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"""Length.""" # standard from typing import Union # local from .between import between from .utils import validator @validator def length(value: str, /, *, min_val: Union[int, None] = None, max_val: Union[int, None] = None): """Return whether or not the length of given string is within a specified range. Examples: >>> length('something', min_val=2) # Output: True >>> length('something', min_val=9, max_val=9) # Output: True >>> length('something', max_val=5) # Output: ValidationError(func=length, ...) Args: value: The string to validate. min_val: The minimum required length of the string. If not provided, minimum length will not be checked. max_val: The maximum length of the string. If not provided, maximum length will not be checked. Returns: (Literal[True]): If `len(value)` is in between the given conditions. (ValidationError): If `len(value)` is not in between the given conditions. Raises: (ValueError): If either `min_val` or `max_val` is negative. """ if min_val is not None and min_val < 0: raise ValueError("Length cannot be negative. `min_val` is less than zero.") if max_val is not None and max_val < 0: raise ValueError("Length cannot be negative. `max_val` is less than zero.") return bool(between(len(value), min_val=min_val, max_val=max_val))
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