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$ lzm q@=qn1h e ? # This file is dual licensed under the terms of the Apache License, Version # 2.0, and the BSD License. See the LICENSE file in the root of this repository # for complete details. """ .. testsetup:: from packaging.specifiers import Specifier, SpecifierSet, InvalidSpecifier from packaging.version import Version """ import abc import itertools import re from typing import ( Callable, Iterable, Iterator, List, Optional, Set, Tuple, TypeVar, Union, ) from .utils import canonicalize_version from .version import Version UnparsedVersion = Union[Version, str] UnparsedVersionVar = TypeVar("UnparsedVersionVar", bound=UnparsedVersion) CallableOperator = Callable[[Version, str], bool] def _coerce_version(version: UnparsedVersion) -> Version: if not isinstance(version, Version): version = Version(version) return version class InvalidSpecifier(ValueError): """ Raised when attempting to create a :class:`Specifier` with a specifier string that is invalid. >>> Specifier("lolwat") Traceback (most recent call last): ... packaging.specifiers.InvalidSpecifier: Invalid specifier: 'lolwat' """ class BaseSpecifier(metaclass=abc.ABCMeta): @abc.abstractmethod def __str__(self) -> str: """ Returns the str representation of this Specifier-like object. This should be representative of the Specifier itself. """ @abc.abstractmethod def __hash__(self) -> int: """ Returns a hash value for this Specifier-like object. """ @abc.abstractmethod def __eq__(self, other: object) -> bool: """ Returns a boolean representing whether or not the two Specifier-like objects are equal. :param other: The other object to check against. """ @property @abc.abstractmethod def prereleases(self) -> Optional[bool]: """Whether or not pre-releases as a whole are allowed. This can be set to either ``True`` or ``False`` to explicitly enable or disable prereleases or it can be set to ``None`` (the default) to use default semantics. """ @prereleases.setter def prereleases(self, value: bool) -> None: """Setter for :attr:`prereleases`. :param value: The value to set. """ @abc.abstractmethod def contains(self, item: str, prereleases: Optional[bool] = None) -> bool: """ Determines if the given item is contained within this specifier. """ @abc.abstractmethod def filter( self, iterable: Iterable[UnparsedVersionVar], prereleases: Optional[bool] = None ) -> Iterator[UnparsedVersionVar]: """ Takes an iterable of items and filters them so that only items which are contained within this specifier are allowed in it. """ class Specifier(BaseSpecifier): """This class abstracts handling of version specifiers. .. tip:: It is generally not required to instantiate this manually. You should instead prefer to work with :class:`SpecifierSet` instead, which can parse comma-separated version specifiers (which is what package metadata contains). """ _operator_regex_str = r""" (?P