Update tempora==5.5.0

lib/jaraco/functools.py

@@ -1,9 +1,10 @@
-import functools
-import time
-import inspect
 import collections
-import types
+import functools
+import inspect
 import itertools
+import operator
+import time
+import types
 import warnings
 
 import more_itertools
@@ -183,8 +184,9 @@ def method_cache(
     # Support cache clear even before cache has been created.
     wrapper.cache_clear = lambda: None  # type: ignore[attr-defined]
 
-    return (  # type: ignore[return-value]
-        _special_method_cache(method, cache_wrapper) or wrapper
+    return (
+        _special_method_cache(method, cache_wrapper)  # type: ignore[return-value]
+        or wrapper
     )
 
 
@@ -554,3 +556,51 @@ def except_(*exceptions, replace=None, use=None):
         return wrapper
 
     return decorate
+
+
+def identity(x):
+    return x
+
+
+def bypass_when(check, *, _op=identity):
+    """
+    Decorate a function to return its parameter when ``check``.
+
+    >>> bypassed = []  # False
+
+    >>> @bypass_when(bypassed)
+    ... def double(x):
+    ...     return x * 2
+    >>> double(2)
+    4
+    >>> bypassed[:] = [object()]  # True
+    >>> double(2)
+    2
+    """
+
+    def decorate(func):
+        @functools.wraps(func)
+        def wrapper(param):
+            return param if _op(check) else func(param)
+
+        return wrapper
+
+    return decorate
+
+
+def bypass_unless(check):
+    """
+    Decorate a function to return its parameter unless ``check``.
+
+    >>> enabled = [object()]  # True
+
+    >>> @bypass_unless(enabled)
+    ... def double(x):
+    ...     return x * 2
+    >>> double(2)
+    4
+    >>> del enabled[:]  # False
+    >>> double(2)
+    2
+    """
+    return bypass_when(check, _op=operator.not_)

lib/more_itertools/__init__.py

@@ -3,4 +3,4 @@
 from .more import *  # noqa
 from .recipes import *  # noqa
 
-__version__ = '9.1.0'
+__version__ = '10.1.0'

lib/more_itertools/more.py

@@ -2,7 +2,7 @@ import warnings
 
 from collections import Counter, defaultdict, deque, abc
 from collections.abc import Sequence
-from functools import partial, reduce, wraps
+from functools import cached_property, partial, reduce, wraps
 from heapq import heapify, heapreplace, heappop
 from itertools import (
     chain,
@@ -17,6 +17,7 @@ from itertools import (
     takewhile,
     tee,
     zip_longest,
+    product,
 )
 from math import exp, factorial, floor, log
 from queue import Empty, Queue
@@ -36,6 +37,7 @@ from .recipes import (
     take,
     unique_everseen,
     all_equal,
+    batched,
 )
 
 __all__ = [
@@ -53,6 +55,7 @@ __all__ = [
     'circular_shifts',
     'collapse',
     'combination_index',
+    'combination_with_replacement_index',
     'consecutive_groups',
     'constrained_batches',
     'consumer',
@@ -93,10 +96,13 @@ __all__ = [
     'nth_or_last',
     'nth_permutation',
     'nth_product',
+    'nth_combination_with_replacement',
     'numeric_range',
     'one',
     'only',
+    'outer_product',
     'padded',
+    'partial_product',
     'partitions',
     'peekable',
     'permutation_index',
@@ -125,6 +131,7 @@ __all__ = [
     'strictly_n',
     'substrings',
     'substrings_indexes',
+    'takewhile_inclusive',
     'time_limited',
     'unique_in_window',
     'unique_to_each',
@@ -472,7 +479,10 @@ def iterate(func, start):
     """
     while True:
         yield start
-        start = func(start)
+        try:
+            start = func(start)
+        except StopIteration:
+            break
 
 
 def with_iter(context_manager):
@@ -2069,7 +2079,6 @@ class numeric_range(abc.Sequence, abc.Hashable):
         if self._step == self._zero:
             raise ValueError('numeric_range() arg 3 must not be zero')
         self._growing = self._step > self._zero
-        self._init_len()
 
     def __bool__(self):
         if self._growing:
@@ -2145,7 +2154,8 @@ class numeric_range(abc.Sequence, abc.Hashable):
     def __len__(self):
         return self._len
 
-    def _init_len(self):
+    @cached_property
+    def _len(self):
         if self._growing:
             start = self._start
             stop = self._stop
@@ -2156,10 +2166,10 @@ class numeric_range(abc.Sequence, abc.Hashable):
             step = -self._step
         distance = stop - start
         if distance <= self._zero:
-            self._len = 0
+            return 0
         else:  # distance > 0 and step > 0: regular euclidean division
             q, r = divmod(distance, step)
-            self._len = int(q) + int(r != self._zero)
+            return int(q) + int(r != self._zero)
 
     def __reduce__(self):
         return numeric_range, (self._start, self._stop, self._step)
@@ -2699,6 +2709,9 @@ class seekable:
         >>> it.seek(10)
         >>> next(it)
         '10'
+        >>> it.relative_seek(-2)  # Seeking relative to the current position
+        >>> next(it)
+        '9'
         >>> it.seek(20)  # Seeking past the end of the source isn't a problem
         >>> list(it)
         []
@@ -2812,6 +2825,10 @@ class seekable:
         if remainder > 0:
             consume(self, remainder)
 
+    def relative_seek(self, count):
+        index = len(self._cache)
+        self.seek(max(index + count, 0))
+
 
 class run_length:
     """
@@ -3859,6 +3876,54 @@ def nth_permutation(iterable, r, index):
     return tuple(map(pool.pop, result))
 
 
+def nth_combination_with_replacement(iterable, r, index):
+    """Equivalent to
+    ``list(combinations_with_replacement(iterable, r))[index]``.
+
+
+    The subsequences with repetition of *iterable* that are of length *r* can
+    be ordered lexicographically. :func:`nth_combination_with_replacement`
+    computes the subsequence at sort position *index* directly, without
+    computing the previous subsequences with replacement.
+
+        >>> nth_combination_with_replacement(range(5), 3, 5)
+        (0, 1, 1)
+
+    ``ValueError`` will be raised If *r* is negative or greater than the length
+    of *iterable*.
+    ``IndexError`` will be raised if the given *index* is invalid.
+    """
+    pool = tuple(iterable)
+    n = len(pool)
+    if (r < 0) or (r > n):
+        raise ValueError
+
+    c = factorial(n + r - 1) // (factorial(r) * factorial(n - 1))
+
+    if index < 0:
+        index += c
+
+    if (index < 0) or (index >= c):
+        raise IndexError
+
+    result = []
+    i = 0
+    while r:
+        r -= 1
+        while n >= 0:
+            num_combs = factorial(n + r - 1) // (
+                factorial(r) * factorial(n - 1)
+            )
+            if index < num_combs:
+                break
+            n -= 1
+            i += 1
+            index -= num_combs
+        result.append(pool[i])
+
+    return tuple(result)
+
+
 def value_chain(*args):
     """Yield all arguments passed to the function in the same order in which
     they were passed. If an argument itself is iterable then iterate over its
@@ -3955,6 +4020,61 @@ def combination_index(element, iterable):
     return factorial(n + 1) // (factorial(k + 1) * factorial(n - k)) - index
 
 
+def combination_with_replacement_index(element, iterable):
+    """Equivalent to
+    ``list(combinations_with_replacement(iterable, r)).index(element)``
+
+    The subsequences with repetition of *iterable* that are of length *r* can
+    be ordered lexicographically. :func:`combination_with_replacement_index`
+    computes the index of the first *element*, without computing the previous
+    combinations with replacement.
+
+        >>> combination_with_replacement_index('adf', 'abcdefg')
+        20
+
+    ``ValueError`` will be raised if the given *element* isn't one of the
+    combinations with replacement of *iterable*.
+    """
+    element = tuple(element)
+    l = len(element)
+    element = enumerate(element)
+
+    k, y = next(element, (None, None))
+    if k is None:
+        return 0
+
+    indexes = []
+    pool = tuple(iterable)
+    for n, x in enumerate(pool):
+        while x == y:
+            indexes.append(n)
+            tmp, y = next(element, (None, None))
+            if tmp is None:
+                break
+            else:
+                k = tmp
+        if y is None:
+            break
+    else:
+        raise ValueError(
+            'element is not a combination with replacment of iterable'
+        )
+
+    n = len(pool)
+    occupations = [0] * n
+    for p in indexes:
+        occupations[p] += 1
+
+    index = 0
+    for k in range(1, n):
+        j = l + n - 1 - k - sum(occupations[:k])
+        i = n - k
+        if i <= j:
+            index += factorial(j) // (factorial(i) * factorial(j - i))
+
+    return index
+
+
 def permutation_index(element, iterable):
     """Equivalent to ``list(permutations(iterable, r)).index(element)```
 
@@ -4057,26 +4177,20 @@ def _chunked_even_finite(iterable, N, n):
     num_full = N - partial_size * num_lists
     num_partial = num_lists - num_full
 
-    buffer = []
-    iterator = iter(iterable)
-
     # Yield num_full lists of full_size
-    for x in iterator:
-        buffer.append(x)
-        if len(buffer) == full_size:
-            yield buffer
-            buffer = []
-            num_full -= 1
-            if num_full <= 0:
-                break
+    partial_start_idx = num_full * full_size
+    if full_size > 0:
+        for i in range(0, partial_start_idx, full_size):
+            yield list(islice(iterable, i, i + full_size))
 
     # Yield num_partial lists of partial_size
-    for x in iterator:
-        buffer.append(x)
-        if len(buffer) == partial_size:
-            yield buffer
-            buffer = []
-            num_partial -= 1
+    if partial_size > 0:
+        for i in range(
+            partial_start_idx,
+            partial_start_idx + (num_partial * partial_size),
+            partial_size,
+        ):
+            yield list(islice(iterable, i, i + partial_size))
 
 
 def zip_broadcast(*objects, scalar_types=(str, bytes), strict=False):
@@ -4115,30 +4229,23 @@ def zip_broadcast(*objects, scalar_types=(str, bytes), strict=False):
     if not size:
         return
 
+    new_item = [None] * size
     iterables, iterable_positions = [], []
-    scalars, scalar_positions = [], []
     for i, obj in enumerate(objects):
         if is_scalar(obj):
-            scalars.append(obj)
-            scalar_positions.append(i)
+            new_item[i] = obj
         else:
             iterables.append(iter(obj))
             iterable_positions.append(i)
 
-    if len(scalars) == size:
+    if not iterables:
         yield tuple(objects)
         return
 
     zipper = _zip_equal if strict else zip
     for item in zipper(*iterables):
-        new_item = [None] * size
-
-        for i, elem in zip(iterable_positions, item):
-            new_item[i] = elem
-
-        for i, elem in zip(scalar_positions, scalars):
-            new_item[i] = elem
-
+        for i, new_item[i] in zip(iterable_positions, item):
+            pass
         yield tuple(new_item)
 
 
@@ -4163,22 +4270,23 @@ def unique_in_window(iterable, n, key=None):
         raise ValueError('n must be greater than 0')
 
     window = deque(maxlen=n)
-    uniques = set()
+    counts = defaultdict(int)
     use_key = key is not None
 
     for item in iterable:
+        if len(window) == n:
+            to_discard = window[0]
+            if counts[to_discard] == 1:
+                del counts[to_discard]
+            else:
+                counts[to_discard] -= 1
+
         k = key(item) if use_key else item
-        if k in uniques:
-            continue
-
-        if len(uniques) == n:
-            uniques.discard(window[0])
-
-        uniques.add(k)
+        if k not in counts:
+            yield item
+        counts[k] += 1
         window.append(k)
 
-        yield item
-
 
 def duplicates_everseen(iterable, key=None):
     """Yield duplicate elements after their first appearance.
@@ -4221,12 +4329,7 @@ def duplicates_justseen(iterable, key=None):
     This function is analagous to :func:`unique_justseen`.
 
     """
-    return flatten(
-        map(
-            lambda group_tuple: islice_extended(group_tuple[1])[1:],
-            groupby(iterable, key),
-        )
-    )
+    return flatten(g for _, g in groupby(iterable, key) for _ in g)
 
 
 def minmax(iterable_or_value, *others, key=None, default=_marker):
@@ -4390,3 +4493,77 @@ def gray_product(*iterables):
             o[j] = -o[j]
             f[j] = f[j + 1]
             f[j + 1] = j + 1
+
+
+def partial_product(*iterables):
+    """Yields tuples containing one item from each iterator, with subsequent
+    tuples changing a single item at a time by advancing each iterator until it
+    is exhausted. This sequence guarantees every value in each iterable is
+    output at least once without generating all possible combinations.
+
+    This may be useful, for example, when testing an expensive function.
+
+        >>> list(partial_product('AB', 'C', 'DEF'))
+        [('A', 'C', 'D'), ('B', 'C', 'D'), ('B', 'C', 'E'), ('B', 'C', 'F')]
+    """
+
+    iterators = list(map(iter, iterables))
+
+    try:
+        prod = [next(it) for it in iterators]
+    except StopIteration:
+        return
+    yield tuple(prod)
+
+    for i, it in enumerate(iterators):
+        for prod[i] in it:
+            yield tuple(prod)
+
+
+def takewhile_inclusive(predicate, iterable):
+    """A variant of :func:`takewhile` that yields one additional element.
+
+        >>> list(takewhile_inclusive(lambda x: x < 5, [1, 4, 6, 4, 1]))
+        [1, 4, 6]
+
+    :func:`takewhile` would return ``[1, 4]``.
+    """
+    for x in iterable:
+        if predicate(x):
+            yield x
+        else:
+            yield x
+            break
+
+
+def outer_product(func, xs, ys, *args, **kwargs):
+    """A generalized outer product that applies a binary function to all
+    pairs of items. Returns a 2D matrix with ``len(xs)`` rows and ``len(ys)``
+    columns.
+    Also accepts ``*args`` and ``**kwargs`` that are passed to ``func``.
+
+    Multiplication table:
+
+    >>> list(outer_product(mul, range(1, 4), range(1, 6)))
+    [(1, 2, 3, 4, 5), (2, 4, 6, 8, 10), (3, 6, 9, 12, 15)]
+
+    Cross tabulation:
+
+    >>> xs = ['A', 'B', 'A', 'A', 'B', 'B', 'A', 'A', 'B', 'B']
+    >>> ys = ['X', 'X', 'X', 'Y', 'Z', 'Z', 'Y', 'Y', 'Z', 'Z']
+    >>> rows = list(zip(xs, ys))
+    >>> count_rows = lambda x, y: rows.count((x, y))
+    >>> list(outer_product(count_rows, sorted(set(xs)), sorted(set(ys))))
+    [(2, 3, 0), (1, 0, 4)]
+
+    Usage with ``*args`` and ``**kwargs``:
+
+    >>> animals = ['cat', 'wolf', 'mouse']
+    >>> list(outer_product(min, animals, animals, key=len))
+    [('cat', 'cat', 'cat'), ('cat', 'wolf', 'wolf'), ('cat', 'wolf', 'mouse')]
+    """
+    ys = tuple(ys)
+    return batched(
+        starmap(lambda x, y: func(x, y, *args, **kwargs), product(xs, ys)),
+        n=len(ys),
+    )

lib/more_itertools/more.pyi

@@ -440,6 +440,7 @@ class seekable(Generic[_T], Iterator[_T]):
     def peek(self, default: _U) -> _T | _U: ...
     def elements(self) -> SequenceView[_T]: ...
     def seek(self, index: int) -> None: ...
+    def relative_seek(self, count: int) -> None: ...
 
 class run_length:
     @staticmethod
@@ -578,6 +579,9 @@ def all_unique(
     iterable: Iterable[_T], key: Callable[[_T], _U] | None = ...
 ) -> bool: ...
 def nth_product(index: int, *args: Iterable[_T]) -> tuple[_T, ...]: ...
+def nth_combination_with_replacement(
+    iterable: Iterable[_T], r: int, index: int
+) -> tuple[_T, ...]: ...
 def nth_permutation(
     iterable: Iterable[_T], r: int, index: int
 ) -> tuple[_T, ...]: ...
@@ -586,6 +590,9 @@ def product_index(element: Iterable[_T], *args: Iterable[_T]) -> int: ...
 def combination_index(
     element: Iterable[_T], iterable: Iterable[_T]
 ) -> int: ...
+def combination_with_replacement_index(
+    element: Iterable[_T], iterable: Iterable[_T]
+) -> int: ...
 def permutation_index(
     element: Iterable[_T], iterable: Iterable[_T]
 ) -> int: ...
@@ -664,3 +671,14 @@ def constrained_batches(
     strict: bool = ...,
 ) -> Iterator[tuple[_T]]: ...
 def gray_product(*iterables: Iterable[_T]) -> Iterator[tuple[_T, ...]]: ...
+def partial_product(*iterables: Iterable[_T]) -> Iterator[tuple[_T, ...]]: ...
+def takewhile_inclusive(
+    predicate: Callable[[_T], bool], iterable: Iterable[_T]
+) -> Iterator[_T]: ...
+def outer_product(
+    func: Callable[[_T, _U], _V],
+    xs: Iterable[_T],
+    ys: Iterable[_U],
+    *args: Any,
+    **kwargs: Any,
+) -> Iterator[tuple[_V, ...]]: ...

lib/more_itertools/recipes.py

@@ -9,11 +9,10 @@ Some backward-compatible usability improvements have been made.
 """
 import math
 import operator
-import warnings
 
 from collections import deque
 from collections.abc import Sized
-from functools import reduce
+from functools import partial, reduce
 from itertools import (
     chain,
     combinations,
@@ -29,7 +28,6 @@ from itertools import (
     zip_longest,
 )
 from random import randrange, sample, choice
-from sys import hexversion
 
 __all__ = [
     'all_equal',
@@ -52,7 +50,9 @@ __all__ = [
     'pad_none',
     'pairwise',
     'partition',
+    'polynomial_eval',
     'polynomial_from_roots',
+    'polynomial_derivative',
     'powerset',
     'prepend',
     'quantify',
@@ -65,6 +65,7 @@ __all__ = [
     'sieve',
     'sliding_window',
     'subslices',
+    'sum_of_squares',
     'tabulate',
     'tail',
     'take',
@@ -77,6 +78,18 @@ __all__ = [
 _marker = object()
 
 
+# zip with strict is available for Python 3.10+
+try:
+    zip(strict=True)
+except TypeError:
+    _zip_strict = zip
+else:
+    _zip_strict = partial(zip, strict=True)
+
+# math.sumprod is available for Python 3.12+
+_sumprod = getattr(math, 'sumprod', lambda x, y: dotproduct(x, y))
+
+
 def take(n, iterable):
     """Return first *n* items of the iterable as a list.
 
@@ -293,7 +306,7 @@ def _pairwise(iterable):
     """
     a, b = tee(iterable)
     next(b, None)
-    yield from zip(a, b)
+    return zip(a, b)
 
 
 try:
@@ -303,7 +316,7 @@ except ImportError:
 else:
 
     def pairwise(iterable):
-        yield from itertools_pairwise(iterable)
+        return itertools_pairwise(iterable)
 
     pairwise.__doc__ = _pairwise.__doc__
 
@@ -334,13 +347,9 @@ def _zip_equal(*iterables):
         for i, it in enumerate(iterables[1:], 1):
             size = len(it)
             if size != first_size:
-                break
-        else:
-            # If we didn't break out, we can use the built-in zip.
-            return zip(*iterables)
-
-        # If we did break out, there was a mismatch.
-        raise UnequalIterablesError(details=(first_size, i, size))
+                raise UnequalIterablesError(details=(first_size, i, size))
+        # All sizes are equal, we can use the built-in zip.
+        return zip(*iterables)
     # If any one of the iterables didn't have a length, start reading
     # them until one runs out.
     except TypeError:
@@ -433,12 +442,9 @@ def partition(pred, iterable):
     if pred is None:
         pred = bool
 
-    evaluations = ((pred(x), x) for x in iterable)
-    t1, t2 = tee(evaluations)
-    return (
-        (x for (cond, x) in t1 if not cond),
-        (x for (cond, x) in t2 if cond),
-    )
+    t1, t2, p = tee(iterable, 3)
+    p1, p2 = tee(map(pred, p))
+    return (compress(t1, map(operator.not_, p1)), compress(t2, p2))
 
 
 def powerset(iterable):
@@ -712,12 +718,14 @@ def convolve(signal, kernel):
     is immediately consumed and stored.
 
     """
+    # This implementation intentionally doesn't match the one in the itertools
+    # documentation.
     kernel = tuple(kernel)[::-1]
     n = len(kernel)
     window = deque([0], maxlen=n) * n
     for x in chain(signal, repeat(0, n - 1)):
         window.append(x)
-        yield sum(map(operator.mul, kernel, window))
+        yield _sumprod(kernel, window)
 
 
 def before_and_after(predicate, it):
@@ -778,9 +786,7 @@ def sliding_window(iterable, n):
     For a variant with more features, see :func:`windowed`.
     """
     it = iter(iterable)
-    window = deque(islice(it, n), maxlen=n)
-    if len(window) == n:
-        yield tuple(window)
+    window = deque(islice(it, n - 1), maxlen=n)
     for x in it:
         window.append(x)
         yield tuple(window)
@@ -807,12 +813,8 @@ def polynomial_from_roots(roots):
     >>> polynomial_from_roots(roots)  # x^3 - 4 * x^2 - 17 * x + 60
     [1, -4, -17, 60]
     """
-    # Use math.prod for Python 3.8+,
-    prod = getattr(math, 'prod', lambda x: reduce(operator.mul, x, 1))
-    roots = list(map(operator.neg, roots))
-    return [
-        sum(map(prod, combinations(roots, k))) for k in range(len(roots) + 1)
-    ]
+    factors = zip(repeat(1), map(operator.neg, roots))
+    return list(reduce(convolve, factors, [1]))
 
 
 def iter_index(iterable, value, start=0):
@@ -830,9 +832,13 @@ def iter_index(iterable, value, start=0):
     except AttributeError:
         # Slow path for general iterables
         it = islice(iterable, start, None)
-        for i, element in enumerate(it, start):
-            if element is value or element == value:
+        i = start - 1
+        try:
+            while True:
+                i = i + operator.indexOf(it, value) + 1
                 yield i
+        except ValueError:
+            pass
     else:
         # Fast path for sequences
         i = start - 1
@@ -850,43 +856,45 @@ def sieve(n):
     >>> list(sieve(30))
     [2, 3, 5, 7, 11, 13, 17, 19, 23, 29]
     """
-    isqrt = getattr(math, 'isqrt', lambda x: int(math.sqrt(x)))
     data = bytearray((0, 1)) * (n // 2)
     data[:3] = 0, 0, 0
-    limit = isqrt(n) + 1
+    limit = math.isqrt(n) + 1
     for p in compress(range(limit), data):
         data[p * p : n : p + p] = bytes(len(range(p * p, n, p + p)))
     data[2] = 1
     return iter_index(data, 1) if n > 2 else iter([])
 
 
-def batched(iterable, n):
+def _batched(iterable, n):
     """Batch data into lists of length *n*. The last batch may be shorter.
 
     >>> list(batched('ABCDEFG', 3))
-    [['A', 'B', 'C'], ['D', 'E', 'F'], ['G']]
+    [('A', 'B', 'C'), ('D', 'E', 'F'), ('G',)]
 
-    This recipe is from the ``itertools`` docs. This library also provides
-    :func:`chunked`, which has a different implementation.
+    On Python 3.12 and above, this is an alias for :func:`itertools.batched`.
     """
-    if hexversion >= 0x30C00A0:  # Python 3.12.0a0
-        warnings.warn(
-            (
-                'batched will be removed in a future version of '
-                'more-itertools. Use the standard library '
-                'itertools.batched function instead'
-            ),
-            DeprecationWarning,
-        )
-
+    if n < 1:
+        raise ValueError('n must be at least one')
     it = iter(iterable)
     while True:
-        batch = list(islice(it, n))
+        batch = tuple(islice(it, n))
         if not batch:
             break
         yield batch
 
 
+try:
+    from itertools import batched as itertools_batched
+except ImportError:
+    batched = _batched
+else:
+
+    def batched(iterable, n):
+        return itertools_batched(iterable, n)
+
+    batched.__doc__ = _batched.__doc__
+
+
 def transpose(it):
     """Swap the rows and columns of the input.
 
@@ -894,21 +902,21 @@ def transpose(it):
     [(1, 11), (2, 22), (3, 33)]
 
     The caller should ensure that the dimensions of the input are compatible.
+    If the input is empty, no output will be produced.
     """
-    # TODO: when 3.9 goes end-of-life, add stric=True to this.
-    return zip(*it)
+    return _zip_strict(*it)
 
 
 def matmul(m1, m2):
     """Multiply two matrices.
     >>> list(matmul([(7, 5), (3, 5)], [(2, 5), (7, 9)]))
-    [[49, 80], [41, 60]]
+    [(49, 80), (41, 60)]
 
     The caller should ensure that the dimensions of the input matrices are
     compatible with each other.
     """
     n = len(m2[0])
-    return batched(starmap(dotproduct, product(m1, transpose(m2))), n)
+    return batched(starmap(_sumprod, product(m1, transpose(m2))), n)
 
 
 def factor(n):
@@ -916,15 +924,54 @@ def factor(n):
     >>> list(factor(360))
     [2, 2, 2, 3, 3, 5]
     """
-    isqrt = getattr(math, 'isqrt', lambda x: int(math.sqrt(x)))
-    for prime in sieve(isqrt(n) + 1):
+    for prime in sieve(math.isqrt(n) + 1):
         while True:
-            quotient, remainder = divmod(n, prime)
-            if remainder:
+            if n % prime:
                 break
             yield prime
-            n = quotient
+            n //= prime
             if n == 1:
                 return
-    if n >= 2:
+    if n > 1:
         yield n
+
+
+def polynomial_eval(coefficients, x):
+    """Evaluate a polynomial at a specific value.
+
+    Example: evaluating x^3 - 4 * x^2 - 17 * x + 60 at x = 2.5:
+
+    >>> coefficients = [1, -4, -17, 60]
+    >>> x = 2.5
+    >>> polynomial_eval(coefficients, x)
+    8.125
+    """
+    n = len(coefficients)
+    if n == 0:
+        return x * 0  # coerce zero to the type of x
+    powers = map(pow, repeat(x), reversed(range(n)))
+    return _sumprod(coefficients, powers)
+
+
+def sum_of_squares(it):
+    """Return the sum of the squares of the input values.
+
+    >>> sum_of_squares([10, 20, 30])
+    1400
+    """
+    return _sumprod(*tee(it))
+
+
+def polynomial_derivative(coefficients):
+    """Compute the first derivative of a polynomial.
+
+    Example: evaluating the derivative of x^3 - 4 * x^2 - 17 * x + 60
+
+    >>> coefficients = [1, -4, -17, 60]
+    >>> derivative_coefficients = polynomial_derivative(coefficients)
+    >>> derivative_coefficients
+    [3, -8, -17]
+    """
+    n = len(coefficients)
+    powers = reversed(range(1, n))
+    return list(map(operator.mul, coefficients, powers))

lib/more_itertools/recipes.pyi

@@ -21,7 +21,7 @@ def tabulate(
     function: Callable[[int], _T], start: int = ...
 ) -> Iterator[_T]: ...
 def tail(n: int, iterable: Iterable[_T]) -> Iterator[_T]: ...
-def consume(iterator: Iterable[object], n: int | None = ...) -> None: ...
+def consume(iterator: Iterable[_T], n: int | None = ...) -> None: ...
 @overload
 def nth(iterable: Iterable[_T], n: int) -> _T | None: ...
 @overload
@@ -101,7 +101,7 @@ def sliding_window(
     iterable: Iterable[_T], n: int
 ) -> Iterator[tuple[_T, ...]]: ...
 def subslices(iterable: Iterable[_T]) -> Iterator[list[_T]]: ...
-def polynomial_from_roots(roots: Sequence[int]) -> list[int]: ...
+def polynomial_from_roots(roots: Sequence[_T]) -> list[_T]: ...
 def iter_index(
     iterable: Iterable[object],
     value: Any,
@@ -111,9 +111,12 @@ def sieve(n: int) -> Iterator[int]: ...
 def batched(
     iterable: Iterable[_T],
     n: int,
-) -> Iterator[list[_T]]: ...
+) -> Iterator[tuple[_T]]: ...
 def transpose(
     it: Iterable[Iterable[_T]],
-) -> tuple[Iterator[_T], ...]: ...
-def matmul(m1: Sequence[_T], m2: Sequence[_T]) -> Iterator[list[_T]]: ...
+) -> Iterator[tuple[_T, ...]]: ...
+def matmul(m1: Sequence[_T], m2: Sequence[_T]) -> Iterator[tuple[_T]]: ...
 def factor(n: int) -> Iterator[int]: ...
+def polynomial_eval(coefficients: Sequence[_T], x: _U) -> _U: ...
+def sum_of_squares(it: Iterable[_T]) -> _T: ...
+def polynomial_derivative(coefficients: Sequence[_T]) -> list[_T]: ...

lib/pytz/__init__.py

@@ -22,8 +22,8 @@ from pytz.tzfile import build_tzinfo
 
 
 # The IANA (nee Olson) database is updated several times a year.
-OLSON_VERSION = '2022g'
-VERSION = '2022.7.1'  # pip compatible version number.
+OLSON_VERSION = '2023c'
+VERSION = '2023.3'  # pip compatible version number.
 __version__ = VERSION
 
 OLSEN_VERSION = OLSON_VERSION  # Old releases had this misspelling
@@ -1311,7 +1311,6 @@ common_timezones = \
  'America/Whitehorse',
  'America/Winnipeg',
  'America/Yakutat',
- 'America/Yellowknife',
  'Antarctica/Casey',
  'Antarctica/Davis',
  'Antarctica/DumontDUrville',

lib/pytz/zoneinfo/iso3166.tab

@@ -238,7 +238,7 @@ SY	Syria
 SZ	Eswatini (Swaziland)
 TC	Turks & Caicos Is
 TD	Chad
-TF	French Southern Territories
+TF	French S. Terr.
 TG	Togo
 TH	Thailand
 TJ	Tajikistan

lib/pytz/zoneinfo/leapseconds

@@ -72,11 +72,11 @@ Leap	2016	Dec	31	23:59:60	+	S
 # Any additional leap seconds will come after this.
 # This Expires line is commented out for now,
 # so that pre-2020a zic implementations do not reject this file.
-#Expires 2023	Jun	28	00:00:00
+#Expires 2023	Dec	28	00:00:00
 
 # POSIX timestamps for the data in this file:
 #updated 1467936000 (2016-07-08 00:00:00 UTC)
-#expires 1687910400 (2023-06-28 00:00:00 UTC)
+#expires 1703721600 (2023-12-28 00:00:00 UTC)
 
-#	Updated through IERS Bulletin C64
-#	File expires on:  28 June 2023
+#	Updated through IERS Bulletin C65
+#	File expires on:  28 December 2023

lib/pytz/zoneinfo/tzdata.zi

@@ -75,6 +75,8 @@ R K 2014 o - May 15 24 1 S
 R K 2014 o - Jun 26 24 0 -
 R K 2014 o - Jul 31 24 1 S
 R K 2014 o - S lastTh 24 0 -
+R K 2023 ma - Ap lastF 0 1 S
+R K 2023 ma - O lastTh 24 0 -
 Z Africa/Cairo 2:5:9 - LMT 1900 O
 2 K EE%sT
 Z Africa/Bissau -1:2:20 - LMT 1912 Ja 1 1u
@@ -172,7 +174,7 @@ R M 2021 o - May 16 2 0 -
 R M 2022 o - Mar 27 3 -1 -
 R M 2022 o - May 8 2 0 -
 R M 2023 o - Mar 19 3 -1 -
-R M 2023 o - Ap 30 2 0 -
+R M 2023 o - Ap 23 2 0 -
 R M 2024 o - Mar 10 3 -1 -
 R M 2024 o - Ap 14 2 0 -
 R M 2025 o - F 23 3 -1 -
@@ -188,7 +190,7 @@ R M 2029 o - F 18 2 0 -
 R M 2029 o - D 30 3 -1 -
 R M 2030 o - F 10 2 0 -
 R M 2030 o - D 22 3 -1 -
-R M 2031 o - F 2 2 0 -
+R M 2031 o - Ja 26 2 0 -
 R M 2031 o - D 14 3 -1 -
 R M 2032 o - Ja 18 2 0 -
 R M 2032 o - N 28 3 -1 -
@@ -204,7 +206,7 @@ R M 2036 o - N 23 2 0 -
 R M 2037 o - O 4 3 -1 -
 R M 2037 o - N 15 2 0 -
 R M 2038 o - S 26 3 -1 -
-R M 2038 o - N 7 2 0 -
+R M 2038 o - O 31 2 0 -
 R M 2039 o - S 18 3 -1 -
 R M 2039 o - O 23 2 0 -
 R M 2040 o - S 2 3 -1 -
@@ -220,7 +222,7 @@ R M 2044 o - Au 28 2 0 -
 R M 2045 o - Jul 9 3 -1 -
 R M 2045 o - Au 20 2 0 -
 R M 2046 o - Jul 1 3 -1 -
-R M 2046 o - Au 12 2 0 -
+R M 2046 o - Au 5 2 0 -
 R M 2047 o - Jun 23 3 -1 -
 R M 2047 o - Jul 28 2 0 -
 R M 2048 o - Jun 7 3 -1 -
@@ -236,7 +238,7 @@ R M 2052 o - Jun 2 2 0 -
 R M 2053 o - Ap 13 3 -1 -
 R M 2053 o - May 25 2 0 -
 R M 2054 o - Ap 5 3 -1 -
-R M 2054 o - May 17 2 0 -
+R M 2054 o - May 10 2 0 -
 R M 2055 o - Mar 28 3 -1 -
 R M 2055 o - May 2 2 0 -
 R M 2056 o - Mar 12 3 -1 -
@@ -252,7 +254,7 @@ R M 2060 o - Mar 7 2 0 -
 R M 2061 o - Ja 16 3 -1 -
 R M 2061 o - F 27 2 0 -
 R M 2062 o - Ja 8 3 -1 -
-R M 2062 o - F 19 2 0 -
+R M 2062 o - F 12 2 0 -
 R M 2062 o - D 31 3 -1 -
 R M 2063 o - F 4 2 0 -
 R M 2063 o - D 16 3 -1 -
@@ -268,7 +270,7 @@ R M 2067 o - D 11 2 0 -
 R M 2068 o - O 21 3 -1 -
 R M 2068 o - D 2 2 0 -
 R M 2069 o - O 13 3 -1 -
-R M 2069 o - N 24 2 0 -
+R M 2069 o - N 17 2 0 -
 R M 2070 o - O 5 3 -1 -
 R M 2070 o - N 9 2 0 -
 R M 2071 o - S 20 3 -1 -
@@ -284,7 +286,7 @@ R M 2075 o - S 15 2 0 -
 R M 2076 o - Jul 26 3 -1 -
 R M 2076 o - S 6 2 0 -
 R M 2077 o - Jul 18 3 -1 -
-R M 2077 o - Au 29 2 0 -
+R M 2077 o - Au 22 2 0 -
 R M 2078 o - Jul 10 3 -1 -
 R M 2078 o - Au 14 2 0 -
 R M 2079 o - Jun 25 3 -1 -
@@ -294,13 +296,13 @@ R M 2080 o - Jul 21 2 0 -
 R M 2081 o - Jun 1 3 -1 -
 R M 2081 o - Jul 13 2 0 -
 R M 2082 o - May 24 3 -1 -
-R M 2082 o - Jul 5 2 0 -
+R M 2082 o - Jun 28 2 0 -
 R M 2083 o - May 16 3 -1 -
 R M 2083 o - Jun 20 2 0 -
 R M 2084 o - Ap 30 3 -1 -
 R M 2084 o - Jun 11 2 0 -
 R M 2085 o - Ap 22 3 -1 -
-R M 2085 o - Jun 3 2 0 -
+R M 2085 o - May 27 2 0 -
 R M 2086 o - Ap 14 3 -1 -
 R M 2086 o - May 19 2 0 -
 R M 2087 o - Mar 30 3 -1 -
@@ -997,8 +999,86 @@ R P 2020 2021 - Mar Sa<=30 0 1 S
 R P 2020 o - O 24 1 0 -
 R P 2021 o - O 29 1 0 -
 R P 2022 o - Mar 27 0 1 S
-R P 2022 ma - O Sa<=30 2 0 -
-R P 2023 ma - Mar Sa<=30 2 1 S
+R P 2022 2035 - O Sa<=30 2 0 -
+R P 2023 o - Ap 29 2 1 S
+R P 2024 o - Ap 13 2 1 S
+R P 2025 o - Ap 5 2 1 S
+R P 2026 2054 - Mar Sa<=30 2 1 S
+R P 2036 o - O 18 2 0 -
+R P 2037 o - O 10 2 0 -
+R P 2038 o - S 25 2 0 -
+R P 2039 o - S 17 2 0 -
+R P 2039 o - O 22 2 1 S
+R P 2039 2067 - O Sa<=30 2 0 -
+R P 2040 o - S 1 2 0 -
+R P 2040 o - O 13 2 1 S
+R P 2041 o - Au 24 2 0 -
+R P 2041 o - S 28 2 1 S
+R P 2042 o - Au 16 2 0 -
+R P 2042 o - S 20 2 1 S
+R P 2043 o - Au 1 2 0 -
+R P 2043 o - S 12 2 1 S
+R P 2044 o - Jul 23 2 0 -
+R P 2044 o - Au 27 2 1 S
+R P 2045 o - Jul 15 2 0 -
+R P 2045 o - Au 19 2 1 S
+R P 2046 o - Jun 30 2 0 -
+R P 2046 o - Au 11 2 1 S
+R P 2047 o - Jun 22 2 0 -
+R P 2047 o - Jul 27 2 1 S
+R P 2048 o - Jun 6 2 0 -
+R P 2048 o - Jul 18 2 1 S
+R P 2049 o - May 29 2 0 -
+R P 2049 o - Jul 3 2 1 S
+R P 2050 o - May 21 2 0 -
+R P 2050 o - Jun 25 2 1 S
+R P 2051 o - May 6 2 0 -
+R P 2051 o - Jun 17 2 1 S
+R P 2052 o - Ap 27 2 0 -
+R P 2052 o - Jun 1 2 1 S
+R P 2053 o - Ap 12 2 0 -
+R P 2053 o - May 24 2 1 S
+R P 2054 o - Ap 4 2 0 -
+R P 2054 o - May 16 2 1 S
+R P 2055 o - May 1 2 1 S
+R P 2056 o - Ap 22 2 1 S
+R P 2057 o - Ap 7 2 1 S
+R P 2058 ma - Mar Sa<=30 2 1 S
+R P 2068 o - O 20 2 0 -
+R P 2069 o - O 12 2 0 -
+R P 2070 o - O 4 2 0 -
+R P 2071 o - S 19 2 0 -
+R P 2072 o - S 10 2 0 -
+R P 2072 o - O 15 2 1 S
+R P 2073 o - S 2 2 0 -
+R P 2073 o - O 7 2 1 S
+R P 2074 o - Au 18 2 0 -
+R P 2074 o - S 29 2 1 S
+R P 2075 o - Au 10 2 0 -
+R P 2075 o - S 14 2 1 S
+R P 2075 ma - O Sa<=30 2 0 -
+R P 2076 o - Jul 25 2 0 -
+R P 2076 o - S 5 2 1 S
+R P 2077 o - Jul 17 2 0 -
+R P 2077 o - Au 28 2 1 S
+R P 2078 o - Jul 9 2 0 -
+R P 2078 o - Au 13 2 1 S
+R P 2079 o - Jun 24 2 0 -
+R P 2079 o - Au 5 2 1 S
+R P 2080 o - Jun 15 2 0 -
+R P 2080 o - Jul 20 2 1 S
+R P 2081 o - Jun 7 2 0 -
+R P 2081 o - Jul 12 2 1 S
+R P 2082 o - May 23 2 0 -
+R P 2082 o - Jul 4 2 1 S
+R P 2083 o - May 15 2 0 -
+R P 2083 o - Jun 19 2 1 S
+R P 2084 o - Ap 29 2 0 -
+R P 2084 o - Jun 10 2 1 S
+R P 2085 o - Ap 21 2 0 -
+R P 2085 o - Jun 2 2 1 S
+R P 2086 o - Ap 13 2 0 -
+R P 2086 o - May 18 2 1 S
 Z Asia/Gaza 2:17:52 - LMT 1900 O
 2 Z EET/EEST 1948 May 15
 2 K EE%sT 1967 Jun 5
@@ -1754,8 +1834,8 @@ Z America/Scoresbysund -1:27:52 - LMT 1916 Jul 28
 -1 E -01/+00
 Z America/Nuuk -3:26:56 - LMT 1916 Jul 28
 -3 - -03 1980 Ap 6 2
--3 E -03/-02 2023 Mar 25 22
--2 - -02
+-3 E -03/-02 2023 O 29 1u
+-2 E -02/-01
 Z America/Thule -4:35:8 - LMT 1916 Jul 28
 -4 Th A%sT
 Z Europe/Tallinn 1:39 - LMT 1880
@@ -2175,13 +2255,13 @@ Z Europe/Volgograd 2:57:40 - LMT 1920 Ja 3
 3 - +03 1930 Jun 21
 4 - +04 1961 N 11
 4 R +04/+05 1988 Mar 27 2s
-3 R +03/+04 1991 Mar 31 2s
+3 R MSK/MSD 1991 Mar 31 2s
 4 - +04 1992 Mar 29 2s
-3 R +03/+04 2011 Mar 27 2s
-4 - +04 2014 O 26 2s
-3 - +03 2018 O 28 2s
+3 R MSK/MSD 2011 Mar 27 2s
+4 - MSK 2014 O 26 2s
+3 - MSK 2018 O 28 2s
 4 - +04 2020 D 27 2s
-3 - +03
+3 - MSK
 Z Europe/Saratov 3:4:18 - LMT 1919 Jul 1 0u
 3 - +03 1930 Jun 21
 4 R +04/+05 1988 Mar 27 2s
@@ -2194,11 +2274,11 @@ Z Europe/Saratov 3:4:18 - LMT 1919 Jul 1 0u
 Z Europe/Kirov 3:18:48 - LMT 1919 Jul 1 0u
 3 - +03 1930 Jun 21
 4 R +04/+05 1989 Mar 26 2s
-3 R +03/+04 1991 Mar 31 2s
+3 R MSK/MSD 1991 Mar 31 2s
 4 - +04 1992 Mar 29 2s
-3 R +03/+04 2011 Mar 27 2s
-4 - +04 2014 O 26 2s
-3 - +03
+3 R MSK/MSD 2011 Mar 27 2s
+4 - MSK 2014 O 26 2s
+3 - MSK
 Z Europe/Samara 3:20:20 - LMT 1919 Jul 1 0u
 3 - +03 1930 Jun 21
 4 - +04 1935 Ja 27
@@ -3070,9 +3150,6 @@ Z America/Cambridge_Bay 0 - -00 1920
 -5 - EST 2000 N 5
 -6 - CST 2001 Ap 1 3
 -7 C M%sT
-Z America/Yellowknife 0 - -00 1935
--7 Y M%sT 1980
--7 C M%sT
 Z America/Inuvik 0 - -00 1953
 -8 Y P%sT 1979 Ap lastSu 2
 -7 Y M%sT 1980
@@ -4171,6 +4248,7 @@ L America/Argentina/Cordoba America/Rosario
 L America/Tijuana America/Santa_Isabel
 L America/Denver America/Shiprock
 L America/Toronto America/Thunder_Bay
+L America/Edmonton America/Yellowknife
 L Pacific/Auckland Antarctica/South_Pole
 L Asia/Shanghai Asia/Chongqing
 L Asia/Shanghai Asia/Harbin

lib/pytz/zoneinfo/zone.tab

@@ -121,9 +121,8 @@ CA	+744144-0944945	America/Resolute	Central - NU (Resolute)
 CA	+624900-0920459	America/Rankin_Inlet	Central - NU (central)
 CA	+5024-10439	America/Regina	CST - SK (most areas)
 CA	+5017-10750	America/Swift_Current	CST - SK (midwest)
-CA	+5333-11328	America/Edmonton	Mountain - AB; BC (E); SK (W)
+CA	+5333-11328	America/Edmonton	Mountain - AB; BC (E); NT (E); SK (W)
 CA	+690650-1050310	America/Cambridge_Bay	Mountain - NU (west)
-CA	+6227-11421	America/Yellowknife	Mountain - NT (central)
 CA	+682059-1334300	America/Inuvik	Mountain - NT (west)
 CA	+4906-11631	America/Creston	MST - BC (Creston)
 CA	+5546-12014	America/Dawson_Creek	MST - BC (Dawson Cr, Ft St John)
@@ -139,7 +138,7 @@ CG	-0416+01517	Africa/Brazzaville
 CH	+4723+00832	Europe/Zurich
 CI	+0519-00402	Africa/Abidjan
 CK	-2114-15946	Pacific/Rarotonga
-CL	-3327-07040	America/Santiago	Chile (most areas)
+CL	-3327-07040	America/Santiago	most of Chile
 CL	-5309-07055	America/Punta_Arenas	Region of Magallanes
 CL	-2709-10926	Pacific/Easter	Easter Island
 CM	+0403+00942	Africa/Douala
@@ -151,10 +150,10 @@ CU	+2308-08222	America/Havana
 CV	+1455-02331	Atlantic/Cape_Verde
 CW	+1211-06900	America/Curacao
 CX	-1025+10543	Indian/Christmas
-CY	+3510+03322	Asia/Nicosia	Cyprus (most areas)
+CY	+3510+03322	Asia/Nicosia	most of Cyprus
 CY	+3507+03357	Asia/Famagusta	Northern Cyprus
 CZ	+5005+01426	Europe/Prague
-DE	+5230+01322	Europe/Berlin	Germany (most areas)
+DE	+5230+01322	Europe/Berlin	most of Germany
 DE	+4742+00841	Europe/Busingen	Busingen
 DJ	+1136+04309	Africa/Djibouti
 DK	+5540+01235	Europe/Copenhagen
@@ -187,7 +186,7 @@ GF	+0456-05220	America/Cayenne
 GG	+492717-0023210	Europe/Guernsey
 GH	+0533-00013	Africa/Accra
 GI	+3608-00521	Europe/Gibraltar
-GL	+6411-05144	America/Nuuk	Greenland (most areas)
+GL	+6411-05144	America/Nuuk	most of Greenland
 GL	+7646-01840	America/Danmarkshavn	National Park (east coast)
 GL	+7029-02158	America/Scoresbysund	Scoresbysund/Ittoqqortoormiit
 GL	+7634-06847	America/Thule	Thule/Pituffik
@@ -235,7 +234,7 @@ KP	+3901+12545	Asia/Pyongyang
 KR	+3733+12658	Asia/Seoul
 KW	+2920+04759	Asia/Kuwait
 KY	+1918-08123	America/Cayman
-KZ	+4315+07657	Asia/Almaty	Kazakhstan (most areas)
+KZ	+4315+07657	Asia/Almaty	most of Kazakhstan
 KZ	+4448+06528	Asia/Qyzylorda	Qyzylorda/Kyzylorda/Kzyl-Orda
 KZ	+5312+06337	Asia/Qostanay	Qostanay/Kostanay/Kustanay
 KZ	+5017+05710	Asia/Aqtobe	Aqtobe/Aktobe
@@ -259,12 +258,12 @@ MD	+4700+02850	Europe/Chisinau
 ME	+4226+01916	Europe/Podgorica
 MF	+1804-06305	America/Marigot
 MG	-1855+04731	Indian/Antananarivo
-MH	+0709+17112	Pacific/Majuro	Marshall Islands (most areas)
+MH	+0709+17112	Pacific/Majuro	most of Marshall Islands
 MH	+0905+16720	Pacific/Kwajalein	Kwajalein
 MK	+4159+02126	Europe/Skopje
 ML	+1239-00800	Africa/Bamako
 MM	+1647+09610	Asia/Yangon
-MN	+4755+10653	Asia/Ulaanbaatar	Mongolia (most areas)
+MN	+4755+10653	Asia/Ulaanbaatar	most of Mongolia
 MN	+4801+09139	Asia/Hovd	Bayan-Olgiy, Govi-Altai, Hovd, Uvs, Zavkhan
 MN	+4804+11430	Asia/Choibalsan	Dornod, Sukhbaatar
 MO	+221150+1133230	Asia/Macau
@@ -302,7 +301,7 @@ NO	+5955+01045	Europe/Oslo
 NP	+2743+08519	Asia/Kathmandu
 NR	-0031+16655	Pacific/Nauru
 NU	-1901-16955	Pacific/Niue
-NZ	-3652+17446	Pacific/Auckland	New Zealand (most areas)
+NZ	-3652+17446	Pacific/Auckland	most of New Zealand
 NZ	-4357-17633	Pacific/Chatham	Chatham Islands
 OM	+2336+05835	Asia/Muscat
 PA	+0858-07932	America/Panama
@@ -310,7 +309,7 @@ PE	-1203-07703	America/Lima
 PF	-1732-14934	Pacific/Tahiti	Society Islands
 PF	-0900-13930	Pacific/Marquesas	Marquesas Islands
 PF	-2308-13457	Pacific/Gambier	Gambier Islands
-PG	-0930+14710	Pacific/Port_Moresby	Papua New Guinea (most areas)
+PG	-0930+14710	Pacific/Port_Moresby	most of Papua New Guinea
 PG	-0613+15534	Pacific/Bougainville	Bougainville
 PH	+1435+12100	Asia/Manila
 PK	+2452+06703	Asia/Karachi
@@ -356,7 +355,7 @@ RU	+4310+13156	Asia/Vladivostok	MSK+07 - Amur River
 RU	+643337+1431336	Asia/Ust-Nera	MSK+07 - Oymyakonsky
 RU	+5934+15048	Asia/Magadan	MSK+08 - Magadan
 RU	+4658+14242	Asia/Sakhalin	MSK+08 - Sakhalin Island
-RU	+6728+15343	Asia/Srednekolymsk	MSK+08 - Sakha (E); North Kuril Is
+RU	+6728+15343	Asia/Srednekolymsk	MSK+08 - Sakha (E); N Kuril Is
 RU	+5301+15839	Asia/Kamchatka	MSK+09 - Kamchatka
 RU	+6445+17729	Asia/Anadyr	MSK+09 - Bering Sea
 RW	-0157+03004	Africa/Kigali
@@ -397,7 +396,7 @@ TT	+1039-06131	America/Port_of_Spain
 TV	-0831+17913	Pacific/Funafuti
 TW	+2503+12130	Asia/Taipei
 TZ	-0648+03917	Africa/Dar_es_Salaam
-UA	+5026+03031	Europe/Kyiv	Ukraine (most areas)
+UA	+5026+03031	Europe/Kyiv	most of Ukraine
 UG	+0019+03225	Africa/Kampala
 UM	+2813-17722	Pacific/Midway	Midway Islands
 UM	+1917+16637	Pacific/Wake	Wake Island
@@ -420,7 +419,7 @@ US	+465042-1012439	America/North_Dakota/New_Salem	Central - ND (Morton rural)
 US	+471551-1014640	America/North_Dakota/Beulah	Central - ND (Mercer)
 US	+394421-1045903	America/Denver	Mountain (most areas)
 US	+433649-1161209	America/Boise	Mountain - ID (south); OR (east)
-US	+332654-1120424	America/Phoenix	MST - Arizona (except Navajo)
+US	+332654-1120424	America/Phoenix	MST - AZ (except Navajo)
 US	+340308-1181434	America/Los_Angeles	Pacific
 US	+611305-1495401	America/Anchorage	Alaska (most areas)
 US	+581807-1342511	America/Juneau	Alaska - Juneau area
@@ -428,7 +427,7 @@ US	+571035-1351807	America/Sitka	Alaska - Sitka area
 US	+550737-1313435	America/Metlakatla	Alaska - Annette Island
 US	+593249-1394338	America/Yakutat	Alaska - Yakutat
 US	+643004-1652423	America/Nome	Alaska (west)
-US	+515248-1763929	America/Adak	Aleutian Islands
+US	+515248-1763929	America/Adak	Alaska - western Aleutians
 US	+211825-1575130	Pacific/Honolulu	Hawaii
 UY	-345433-0561245	America/Montevideo
 UZ	+3940+06648	Asia/Samarkand	Uzbekistan (west)

lib/pytz/zoneinfo/zone1970.tab

@@ -18,7 +18,10 @@
 #     Please see the theory.html file for how these names are chosen.
 #     If multiple timezones overlap a country, each has a row in the
 #     table, with each column 1 containing the country code.
-# 4.  Comments; present if and only if a country has multiple timezones.
+# 4.  Comments; present if and only if countries have multiple timezones,
+#     and useful only for those countries.  For example, the comments
+#     for the row with countries CH,DE,LI and name Europe/Zurich
+#     are useful only for DE, since CH and LI have no other timezones.
 #
 # If a timezone covers multiple countries, the most-populous city is used,
 # and that country is listed first in column 1; any other countries
@@ -34,7 +37,7 @@
 #country-
 #codes	coordinates	TZ	comments
 AD	+4230+00131	Europe/Andorra
-AE,OM,RE,SC,TF	+2518+05518	Asia/Dubai	UAE, Oman, Réunion, Seychelles, Crozet, Scattered Is
+AE,OM,RE,SC,TF	+2518+05518	Asia/Dubai	Crozet, Scattered Is
 AF	+3431+06912	Asia/Kabul
 AL	+4120+01950	Europe/Tirane
 AM	+4011+04430	Asia/Yerevan
@@ -45,7 +48,7 @@ AQ	-6448-06406	Antarctica/Palmer	Palmer
 AQ	-6734-06808	Antarctica/Rothera	Rothera
 AQ	-720041+0023206	Antarctica/Troll	Troll
 AR	-3436-05827	America/Argentina/Buenos_Aires	Buenos Aires (BA, CF)
-AR	-3124-06411	America/Argentina/Cordoba	Argentina (most areas: CB, CC, CN, ER, FM, MN, SE, SF)
+AR	-3124-06411	America/Argentina/Cordoba	most areas: CB, CC, CN, ER, FM, MN, SE, SF
 AR	-2447-06525	America/Argentina/Salta	Salta (SA, LP, NQ, RN)
 AR	-2411-06518	America/Argentina/Jujuy	Jujuy (JY)
 AR	-2649-06513	America/Argentina/Tucuman	Tucumán (TM)
@@ -56,7 +59,7 @@ AR	-3253-06849	America/Argentina/Mendoza	Mendoza (MZ)
 AR	-3319-06621	America/Argentina/San_Luis	San Luis (SL)
 AR	-5138-06913	America/Argentina/Rio_Gallegos	Santa Cruz (SC)
 AR	-5448-06818	America/Argentina/Ushuaia	Tierra del Fuego (TF)
-AS,UM	-1416-17042	Pacific/Pago_Pago	Samoa, Midway
+AS,UM	-1416-17042	Pacific/Pago_Pago	Midway
 AT	+4813+01620	Europe/Vienna
 AU	-3133+15905	Australia/Lord_Howe	Lord Howe Island
 AU	-5430+15857	Antarctica/Macquarie	Macquarie Island
@@ -101,26 +104,25 @@ CA	+4439-06336	America/Halifax	Atlantic - NS (most areas); PE
 CA	+4612-05957	America/Glace_Bay	Atlantic - NS (Cape Breton)
 CA	+4606-06447	America/Moncton	Atlantic - New Brunswick
 CA	+5320-06025	America/Goose_Bay	Atlantic - Labrador (most areas)
-CA,BS	+4339-07923	America/Toronto	Eastern - ON, QC (most areas), Bahamas
+CA,BS	+4339-07923	America/Toronto	Eastern - ON, QC (most areas)
 CA	+6344-06828	America/Iqaluit	Eastern - NU (most areas)
 CA	+4953-09709	America/Winnipeg	Central - ON (west); Manitoba
 CA	+744144-0944945	America/Resolute	Central - NU (Resolute)
 CA	+624900-0920459	America/Rankin_Inlet	Central - NU (central)
 CA	+5024-10439	America/Regina	CST - SK (most areas)
 CA	+5017-10750	America/Swift_Current	CST - SK (midwest)
-CA	+5333-11328	America/Edmonton	Mountain - AB; BC (E); SK (W)
+CA	+5333-11328	America/Edmonton	Mountain - AB; BC (E); NT (E); SK (W)
 CA	+690650-1050310	America/Cambridge_Bay	Mountain - NU (west)
-CA	+6227-11421	America/Yellowknife	Mountain - NT (central)
 CA	+682059-1334300	America/Inuvik	Mountain - NT (west)
 CA	+5546-12014	America/Dawson_Creek	MST - BC (Dawson Cr, Ft St John)
 CA	+5848-12242	America/Fort_Nelson	MST - BC (Ft Nelson)
 CA	+6043-13503	America/Whitehorse	MST - Yukon (east)
 CA	+6404-13925	America/Dawson	MST - Yukon (west)
 CA	+4916-12307	America/Vancouver	Pacific - BC (most areas)
-CH,DE,LI	+4723+00832	Europe/Zurich	Swiss time
+CH,DE,LI	+4723+00832	Europe/Zurich	Büsingen
 CI,BF,GH,GM,GN,IS,ML,MR,SH,SL,SN,TG	+0519-00402	Africa/Abidjan
 CK	-2114-15946	Pacific/Rarotonga
-CL	-3327-07040	America/Santiago	Chile (most areas)
+CL	-3327-07040	America/Santiago	most of Chile
 CL	-5309-07055	America/Punta_Arenas	Region of Magallanes
 CL	-2709-10926	Pacific/Easter	Easter Island
 CN	+3114+12128	Asia/Shanghai	Beijing Time
@@ -129,10 +131,10 @@ CO	+0436-07405	America/Bogota
 CR	+0956-08405	America/Costa_Rica
 CU	+2308-08222	America/Havana
 CV	+1455-02331	Atlantic/Cape_Verde
-CY	+3510+03322	Asia/Nicosia	Cyprus (most areas)
+CY	+3510+03322	Asia/Nicosia	most of Cyprus
 CY	+3507+03357	Asia/Famagusta	Northern Cyprus
 CZ,SK	+5005+01426	Europe/Prague
-DE,DK,NO,SE,SJ	+5230+01322	Europe/Berlin	Germany (most areas), Scandinavia
+DE,DK,NO,SE,SJ	+5230+01322	Europe/Berlin	most of Germany
 DO	+1828-06954	America/Santo_Domingo
 DZ	+3647+00303	Africa/Algiers
 EC	-0210-07950	America/Guayaquil	Ecuador (mainland)
@@ -153,7 +155,7 @@ GB,GG,IM,JE	+513030-0000731	Europe/London
 GE	+4143+04449	Asia/Tbilisi
 GF	+0456-05220	America/Cayenne
 GI	+3608-00521	Europe/Gibraltar
-GL	+6411-05144	America/Nuuk	Greenland (most areas)
+GL	+6411-05144	America/Nuuk	most of Greenland
 GL	+7646-01840	America/Danmarkshavn	National Park (east coast)
 GL	+7029-02158	America/Scoresbysund	Scoresbysund/Ittoqqortoormiit
 GL	+7634-06847	America/Thule	Thule/Pituffik
@@ -183,12 +185,12 @@ JO	+3157+03556	Asia/Amman
 JP	+353916+1394441	Asia/Tokyo
 KE,DJ,ER,ET,KM,MG,SO,TZ,UG,YT	-0117+03649	Africa/Nairobi
 KG	+4254+07436	Asia/Bishkek
-KI,MH,TV,UM,WF	+0125+17300	Pacific/Tarawa	Gilberts, Marshalls, Tuvalu, Wallis & Futuna, Wake
+KI,MH,TV,UM,WF	+0125+17300	Pacific/Tarawa	Gilberts, Marshalls, Wake
 KI	-0247-17143	Pacific/Kanton	Phoenix Islands
 KI	+0152-15720	Pacific/Kiritimati	Line Islands
 KP	+3901+12545	Asia/Pyongyang
 KR	+3733+12658	Asia/Seoul
-KZ	+4315+07657	Asia/Almaty	Kazakhstan (most areas)
+KZ	+4315+07657	Asia/Almaty	most of Kazakhstan
 KZ	+4448+06528	Asia/Qyzylorda	Qyzylorda/Kyzylorda/Kzyl-Orda
 KZ	+5312+06337	Asia/Qostanay	Qostanay/Kostanay/Kustanay
 KZ	+5017+05710	Asia/Aqtobe	Aqtöbe/Aktobe
@@ -205,14 +207,14 @@ MA	+3339-00735	Africa/Casablanca
 MD	+4700+02850	Europe/Chisinau
 MH	+0905+16720	Pacific/Kwajalein	Kwajalein
 MM,CC	+1647+09610	Asia/Yangon
-MN	+4755+10653	Asia/Ulaanbaatar	Mongolia (most areas)
+MN	+4755+10653	Asia/Ulaanbaatar	most of Mongolia
 MN	+4801+09139	Asia/Hovd	Bayan-Ölgii, Govi-Altai, Hovd, Uvs, Zavkhan
 MN	+4804+11430	Asia/Choibalsan	Dornod, Sükhbaatar
 MO	+221150+1133230	Asia/Macau
 MQ	+1436-06105	America/Martinique
 MT	+3554+01431	Europe/Malta
 MU	-2010+05730	Indian/Mauritius
-MV,TF	+0410+07330	Indian/Maldives	Maldives, Kerguelen, St Paul I, Amsterdam I
+MV,TF	+0410+07330	Indian/Maldives	Kerguelen, St Paul I, Amsterdam I
 MX	+1924-09909	America/Mexico_City	Central Mexico
 MX	+2105-08646	America/Cancun	Quintana Roo
 MX	+2058-08937	America/Merida	Campeche, Yucatán
@@ -225,7 +227,7 @@ MX	+2313-10625	America/Mazatlan	Baja California Sur, Nayarit (most areas), Sinal
 MX	+2048-10515	America/Bahia_Banderas	Bahía de Banderas
 MX	+2904-11058	America/Hermosillo	Sonora
 MX	+3232-11701	America/Tijuana	Baja California
-MY,BN	+0133+11020	Asia/Kuching	Sabah, Sarawak, Brunei
+MY,BN	+0133+11020	Asia/Kuching	Sabah, Sarawak
 MZ,BI,BW,CD,MW,RW,ZM,ZW	-2558+03235	Africa/Maputo	Central Africa Time
 NA	-2234+01706	Africa/Windhoek
 NC	-2216+16627	Pacific/Noumea
@@ -237,7 +239,7 @@ NR	-0031+16655	Pacific/Nauru
 NU	-1901-16955	Pacific/Niue
 NZ,AQ	-3652+17446	Pacific/Auckland	New Zealand time
 NZ	-4357-17633	Pacific/Chatham	Chatham Islands
-PA,CA,KY	+0858-07932	America/Panama	EST - Panama, Cayman, ON (Atikokan), NU (Coral H)
+PA,CA,KY	+0858-07932	America/Panama	EST - ON (Atikokan), NU (Coral H)
 PE	-1203-07703	America/Lima
 PF	-1732-14934	Pacific/Tahiti	Society Islands
 PF	-0900-13930	Pacific/Marquesas	Marquesas Islands
@@ -285,13 +287,13 @@ RU	+4310+13156	Asia/Vladivostok	MSK+07 - Amur River
 RU	+643337+1431336	Asia/Ust-Nera	MSK+07 - Oymyakonsky
 RU	+5934+15048	Asia/Magadan	MSK+08 - Magadan
 RU	+4658+14242	Asia/Sakhalin	MSK+08 - Sakhalin Island
-RU	+6728+15343	Asia/Srednekolymsk	MSK+08 - Sakha (E); North Kuril Is
+RU	+6728+15343	Asia/Srednekolymsk	MSK+08 - Sakha (E); N Kuril Is
 RU	+5301+15839	Asia/Kamchatka	MSK+09 - Kamchatka
 RU	+6445+17729	Asia/Anadyr	MSK+09 - Bering Sea
-SA,AQ,KW,YE	+2438+04643	Asia/Riyadh	Arabia, Syowa
-SB,FM	-0932+16012	Pacific/Guadalcanal	Solomons, Pohnpei
+SA,AQ,KW,YE	+2438+04643	Asia/Riyadh	Syowa
+SB,FM	-0932+16012	Pacific/Guadalcanal	Pohnpei
 SD	+1536+03232	Africa/Khartoum
-SG,MY	+0117+10351	Asia/Singapore	Singapore, peninsular Malaysia
+SG,MY	+0117+10351	Asia/Singapore	peninsular Malaysia
 SR	+0550-05510	America/Paramaribo
 SS	+0451+03137	Africa/Juba
 ST	+0020+00644	Africa/Sao_Tome
@@ -299,7 +301,7 @@ SV	+1342-08912	America/El_Salvador
 SY	+3330+03618	Asia/Damascus
 TC	+2128-07108	America/Grand_Turk
 TD	+1207+01503	Africa/Ndjamena
-TH,CX,KH,LA,VN	+1345+10031	Asia/Bangkok	Indochina (most areas)
+TH,CX,KH,LA,VN	+1345+10031	Asia/Bangkok	north Vietnam
 TJ	+3835+06848	Asia/Dushanbe
 TK	-0922-17114	Pacific/Fakaofo
 TL	-0833+12535	Asia/Dili
@@ -308,7 +310,7 @@ TN	+3648+01011	Africa/Tunis
 TO	-210800-1751200	Pacific/Tongatapu
 TR	+4101+02858	Europe/Istanbul
 TW	+2503+12130	Asia/Taipei
-UA	+5026+03031	Europe/Kyiv	Ukraine (most areas)
+UA	+5026+03031	Europe/Kyiv	most of Ukraine
 US	+404251-0740023	America/New_York	Eastern (most areas)
 US	+421953-0830245	America/Detroit	Eastern - MI (most areas)
 US	+381515-0854534	America/Kentucky/Louisville	Eastern - KY (Louisville area)
@@ -328,7 +330,7 @@ US	+465042-1012439	America/North_Dakota/New_Salem	Central - ND (Morton rural)
 US	+471551-1014640	America/North_Dakota/Beulah	Central - ND (Mercer)
 US	+394421-1045903	America/Denver	Mountain (most areas)
 US	+433649-1161209	America/Boise	Mountain - ID (south); OR (east)
-US,CA	+332654-1120424	America/Phoenix	MST - Arizona (except Navajo), Creston BC
+US,CA	+332654-1120424	America/Phoenix	MST - AZ (most areas), Creston BC
 US	+340308-1181434	America/Los_Angeles	Pacific
 US	+611305-1495401	America/Anchorage	Alaska (most areas)
 US	+581807-1342511	America/Juneau	Alaska - Juneau area
@@ -336,13 +338,13 @@ US	+571035-1351807	America/Sitka	Alaska - Sitka area
 US	+550737-1313435	America/Metlakatla	Alaska - Annette Island
 US	+593249-1394338	America/Yakutat	Alaska - Yakutat
 US	+643004-1652423	America/Nome	Alaska (west)
-US	+515248-1763929	America/Adak	Aleutian Islands
-US,UM	+211825-1575130	Pacific/Honolulu	Hawaii
+US	+515248-1763929	America/Adak	Alaska - western Aleutians
+US	+211825-1575130	Pacific/Honolulu	Hawaii
 UY	-345433-0561245	America/Montevideo
 UZ	+3940+06648	Asia/Samarkand	Uzbekistan (west)
 UZ	+4120+06918	Asia/Tashkent	Uzbekistan (east)
 VE	+1030-06656	America/Caracas
-VN	+1045+10640	Asia/Ho_Chi_Minh	Vietnam (south)
+VN	+1045+10640	Asia/Ho_Chi_Minh	south Vietnam
 VU	-1740+16825	Pacific/Efate
 WS	-1350-17144	Pacific/Apia
 ZA,LS,SZ	-2615+02800	Africa/Johannesburg

lib/tempora/__init__.py

@@ -383,9 +383,9 @@ def parse_timedelta(str):
     Note that months and years strict intervals, not aligned
     to a calendar:
 
-    >>> now = datetime.datetime.now()
-    >>> later = now + parse_timedelta('1 year')
-    >>> diff = later.replace(year=now.year) - now
+    >>> date = datetime.datetime.fromisoformat('2000-01-01')
+    >>> later = date + parse_timedelta('1 year')
+    >>> diff = later.replace(year=date.year) - date
     >>> diff.seconds
     20940
 

lib/tempora/schedule.py

@@ -28,7 +28,7 @@ def now():
     A client may override this function to change the default behavior,
     such as to use local time or timezone-naïve times.
     """
-    return datetime.datetime.utcnow().replace(tzinfo=pytz.utc)
+    return datetime.datetime.now(pytz.utc)
 
 
 def from_timestamp(ts):
@@ -38,7 +38,7 @@ def from_timestamp(ts):
     A client may override this function to change the default behavior,
     such as to use local time or timezone-naïve times.
     """
-    return datetime.datetime.utcfromtimestamp(ts).replace(tzinfo=pytz.utc)
+    return datetime.datetime.fromtimestamp(ts, pytz.utc)
 
 
 class DelayedCommand(datetime.datetime):

lib/tempora/timing.py

@@ -48,20 +48,21 @@ class Stopwatch:
     def reset(self):
         self.elapsed = datetime.timedelta(0)
         with contextlib.suppress(AttributeError):
-            del self.start_time
+            del self._start
+
+    def _diff(self):
+        return datetime.timedelta(seconds=time.monotonic() - self._start)
 
     def start(self):
-        self.start_time = datetime.datetime.utcnow()
+        self._start = time.monotonic()
 
     def stop(self):
-        stop_time = datetime.datetime.utcnow()
-        self.elapsed += stop_time - self.start_time
-        del self.start_time
+        self.elapsed += self._diff()
+        del self._start
         return self.elapsed
 
     def split(self):
-        local_duration = datetime.datetime.utcnow() - self.start_time
-        return self.elapsed + local_duration
+        return self.elapsed + self._diff()
 
     # context manager support
     def __enter__(self):