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Edit File : requirements.py \| Size : 2.88 KB
# 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. from __future__ import annotations from typing import Any, Iterator from ._parser import parse_requirement as _parse_requirement from ._tokenizer import ParserSyntaxError from .markers import Marker, _normalize_extra_values from .specifiers import SpecifierSet from .utils import canonicalize_name class InvalidRequirement(ValueError): """ An invalid requirement was found, users should refer to PEP 508. """ class Requirement: """Parse a requirement. Parse a given requirement string into its parts, such as name, specifier, URL, and extras. Raises InvalidRequirement on a badly-formed requirement string. """ # TODO: Can we test whether something is contained within a requirement? # If so how do we do that? Do we need to test against the _name_ of # the thing as well as the version? What about the markers? # TODO: Can we normalize the name and extra name? def __init__(self, requirement_string: str) -> None: try: parsed = _parse_requirement(requirement_string) except ParserSyntaxError as e: raise InvalidRequirement(str(e)) from e self.name: str = parsed.name self.url: str \| None = parsed.url or None self.extras: set[str] = set(parsed.extras or []) self.specifier: SpecifierSet = SpecifierSet(parsed.specifier) self.marker: Marker \| None = None if parsed.marker is not None: self.marker = Marker.__new__(Marker) self.marker._markers = _normalize_extra_values(parsed.marker) def _iter_parts(self, name: str) -> Iterator[str]: yield name if self.extras: formatted_extras = ",".join(sorted(self.extras)) yield f"[{formatted_extras}]" if self.specifier: yield str(self.specifier) if self.url: yield f"@ {self.url}" if self.marker: yield " " if self.marker: yield f"; {self.marker}" def __str__(self) -> str: return "".join(self._iter_parts(self.name)) def __repr__(self) -> str: return f"<Requirement('{self}')>" def __hash__(self) -> int: return hash( ( self.__class__.__name__, *self._iter_parts(canonicalize_name(self.name)), ) ) def __eq__(self, other: Any) -> bool: if not isinstance(other, Requirement): return NotImplemented return ( canonicalize_name(self.name) == canonicalize_name(other.name) and self.extras == other.extras and self.specifier == other.specifier and self.url == other.url and self.marker == other.marker ) Back

Edit File : requirements.py | Size : 2.88 KB

# 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.
from __future__ import annotations

from typing import Any, Iterator

from ._parser import parse_requirement as _parse_requirement
from ._tokenizer import ParserSyntaxError
from .markers import Marker, _normalize_extra_values
from .specifiers import SpecifierSet
from .utils import canonicalize_name

class InvalidRequirement(ValueError):
    """
    An invalid requirement was found, users should refer to PEP 508.
    """

class Requirement:
    """Parse a requirement.

Parse a given requirement string into its parts, such as name, specifier,
    URL, and extras. Raises InvalidRequirement on a badly-formed requirement
    string.
    """

# TODO: Can we test whether something is contained within a requirement?
    #       If so how do we do that? Do we need to test against the _name_ of
    #       the thing as well as the version? What about the markers?
    # TODO: Can we normalize the name and extra name?

def __init__(self, requirement_string: str) -> None:
        try:
            parsed = _parse_requirement(requirement_string)
        except ParserSyntaxError as e:
            raise InvalidRequirement(str(e)) from e

self.name: str = parsed.name
        self.url: str | None = parsed.url or None
        self.extras: set[str] = set(parsed.extras or [])
        self.specifier: SpecifierSet = SpecifierSet(parsed.specifier)
        self.marker: Marker | None = None
        if parsed.marker is not None:
            self.marker = Marker.__new__(Marker)
            self.marker._markers = _normalize_extra_values(parsed.marker)

def _iter_parts(self, name: str) -> Iterator[str]:
        yield name

if self.extras:
            formatted_extras = ",".join(sorted(self.extras))
            yield f"[{formatted_extras}]"

if self.specifier:
            yield str(self.specifier)

if self.url:
            yield f"@ {self.url}"
            if self.marker:
                yield " "

if self.marker:
            yield f"; {self.marker}"

def __str__(self) -> str:
        return "".join(self._iter_parts(self.name))

def __repr__(self) -> str:
        return f"<Requirement('{self}')>"

def __hash__(self) -> int:
        return hash(
            (
                self.__class__.__name__,
                *self._iter_parts(canonicalize_name(self.name)),
            )
        )

def __eq__(self, other: Any) -> bool:
        if not isinstance(other, Requirement):
            return NotImplemented

return (
            canonicalize_name(self.name) == canonicalize_name(other.name)
            and self.extras == other.extras
            and self.specifier == other.specifier
            and self.url == other.url
            and self.marker == other.marker
        )

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