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hc_python
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python3.8
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pydantic
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Filename :
alias_generators.py
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"""Alias generators for converting between different capitalization conventions.""" import re __all__ = ('to_pascal', 'to_camel', 'to_snake') # TODO: in V3, change the argument names to be more descriptive # Generally, don't only convert from snake_case, or name the functions # more specifically like snake_to_camel. 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. """ # If the string is already in camelCase and does not contain a digit followed # by a lowercase letter, return it as it is if re.match('^[a-z]+[A-Za-z0-9]*$', snake) and not re.search(r'\d[a-z]', snake): return snake 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, camelCase, or kebab-case 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) # Replace hyphens with underscores to handle kebab-case snake = snake.replace('-', '_') return snake.lower()