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8d43b8ea39
Also updates: - importlib-metadata-0.7 - jaraco-windows - jaraco.classes-1.5 - jaraco.collections-1.6.0 - jaraco.functools-1.20 - jaraco.structures-1.1.2 - jaraco.text-1.10.1 - jaraco.ui-1.6 - more-itertools-4.3.0 - path.py-11.5.0 - six-1.12.0
75 lines
1.5 KiB
Python
75 lines
1.5 KiB
Python
"""
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Routines for obtaining the class names
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of an object and its parent classes.
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"""
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from __future__ import unicode_literals
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def all_bases(c):
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"""
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return a tuple of all base classes the class c has as a parent.
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>>> object in all_bases(list)
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True
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"""
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return c.mro()[1:]
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def all_classes(c):
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"""
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return a tuple of all classes to which c belongs
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>>> list in all_classes(list)
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True
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"""
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return c.mro()
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# borrowed from
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# http://code.activestate.com/recipes/576949-find-all-subclasses-of-a-given-class/
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def iter_subclasses(cls, _seen=None):
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"""
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Generator over all subclasses of a given class, in depth-first order.
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>>> bool in list(iter_subclasses(int))
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True
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>>> class A(object): pass
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>>> class B(A): pass
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>>> class C(A): pass
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>>> class D(B,C): pass
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>>> class E(D): pass
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>>>
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>>> for cls in iter_subclasses(A):
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... print(cls.__name__)
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B
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D
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E
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C
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>>> # get ALL (new-style) classes currently defined
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>>> res = [cls.__name__ for cls in iter_subclasses(object)]
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>>> 'type' in res
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True
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>>> 'tuple' in res
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True
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>>> len(res) > 100
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True
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"""
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if not isinstance(cls, type):
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raise TypeError(
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'iter_subclasses must be called with '
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'new-style classes, not %.100r' % cls
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)
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if _seen is None:
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_seen = set()
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try:
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subs = cls.__subclasses__()
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except TypeError: # fails only when cls is type
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subs = cls.__subclasses__(cls)
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for sub in subs:
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if sub in _seen:
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continue
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_seen.add(sub)
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yield sub
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for sub in iter_subclasses(sub, _seen):
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yield sub
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