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- from pip._internal.utils.typing import MYPY_CHECK_RUNNING
- if MYPY_CHECK_RUNNING:
- from typing import Optional
- from pip._internal.models.format_control import FormatControl
- class SelectionPreferences(object):
- """
- Encapsulates the candidate selection preferences for downloading
- and installing files.
- """
- __slots__ = ['allow_yanked', 'allow_all_prereleases', 'format_control',
- 'prefer_binary', 'ignore_requires_python']
- # Don't include an allow_yanked default value to make sure each call
- # site considers whether yanked releases are allowed. This also causes
- # that decision to be made explicit in the calling code, which helps
- # people when reading the code.
- def __init__(
- self,
- allow_yanked, # type: bool
- allow_all_prereleases=False, # type: bool
- format_control=None, # type: Optional[FormatControl]
- prefer_binary=False, # type: bool
- ignore_requires_python=None, # type: Optional[bool]
- ):
- # type: (...) -> None
- """Create a SelectionPreferences object.
- :param allow_yanked: Whether files marked as yanked (in the sense
- of PEP 592) are permitted to be candidates for install.
- :param format_control: A FormatControl object or None. Used to control
- the selection of source packages / binary packages when consulting
- the index and links.
- :param prefer_binary: Whether to prefer an old, but valid, binary
- dist over a new source dist.
- :param ignore_requires_python: Whether to ignore incompatible
- "Requires-Python" values in links. Defaults to False.
- """
- if ignore_requires_python is None:
- ignore_requires_python = False
- self.allow_yanked = allow_yanked
- self.allow_all_prereleases = allow_all_prereleases
- self.format_control = format_control
- self.prefer_binary = prefer_binary
- self.ignore_requires_python = ignore_requires_python
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