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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.
"""
# 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