Update cherrypy==18.9.0

lib/pydantic/alias_generators.py

@@ -0,0 +1,50 @@
+"""Alias generators for converting between different capitalization conventions."""
+import re
+
+__all__ = ('to_pascal', 'to_camel', 'to_snake')
+
+
+def to_pascal(snake: str) -> str:
+    """Convert a snake_case string to PascalCase.
+
+    Args:
+        snake: The string to convert.
+
+    Returns:
+        The PascalCase string.
+    """
+    camel = snake.title()
+    return re.sub('([0-9A-Za-z])_(?=[0-9A-Z])', lambda m: m.group(1), camel)
+
+
+def to_camel(snake: str) -> str:
+    """Convert a snake_case string to camelCase.
+
+    Args:
+        snake: The string to convert.
+
+    Returns:
+        The converted camelCase string.
+    """
+    camel = to_pascal(snake)
+    return re.sub('(^_*[A-Z])', lambda m: m.group(1).lower(), camel)
+
+
+def to_snake(camel: str) -> str:
+    """Convert a PascalCase or camelCase string to snake_case.
+
+    Args:
+        camel: The string to convert.
+
+    Returns:
+        The converted string in snake_case.
+    """
+    # Handle the sequence of uppercase letters followed by a lowercase letter
+    snake = re.sub(r'([A-Z]+)([A-Z][a-z])', lambda m: f'{m.group(1)}_{m.group(2)}', camel)
+    # Insert an underscore between a lowercase letter and an uppercase letter
+    snake = re.sub(r'([a-z])([A-Z])', lambda m: f'{m.group(1)}_{m.group(2)}', snake)
+    # Insert an underscore between a digit and an uppercase letter
+    snake = re.sub(r'([0-9])([A-Z])', lambda m: f'{m.group(1)}_{m.group(2)}', snake)
+    # Insert an underscore between a lowercase letter and a digit
+    snake = re.sub(r'([a-z])([0-9])', lambda m: f'{m.group(1)}_{m.group(2)}', snake)
+    return snake.lower()