90 lines
3.5 KiB
Python
90 lines
3.5 KiB
Python
from typing import Any, Iterable
|
|
from .version import __version__ as internal_version
|
|
|
|
__all__ = ['TorchVersion', 'Version', 'InvalidVersion']
|
|
|
|
class _LazyImport:
|
|
"""Wraps around classes lazy imported from packaging.version
|
|
Output of the function v in following snippets are identical:
|
|
from packaging.version import Version
|
|
def v():
|
|
return Version('1.2.3')
|
|
and
|
|
Version = _LazyImport('Version')
|
|
def v():
|
|
return Version('1.2.3')
|
|
The difference here is that in later example imports
|
|
do not happen until v is called
|
|
"""
|
|
def __init__(self, cls_name: str) -> None:
|
|
self._cls_name = cls_name
|
|
|
|
def get_cls(self):
|
|
try:
|
|
import packaging.version # type: ignore[import]
|
|
except ImportError:
|
|
# If packaging isn't installed, try and use the vendored copy
|
|
# in pkg_resources
|
|
from pkg_resources import packaging # type: ignore[attr-defined, no-redef]
|
|
return getattr(packaging.version, self._cls_name)
|
|
|
|
def __call__(self, *args, **kwargs):
|
|
return self.get_cls()(*args, **kwargs)
|
|
|
|
def __instancecheck__(self, obj):
|
|
return isinstance(obj, self.get_cls())
|
|
|
|
|
|
Version = _LazyImport("Version")
|
|
InvalidVersion = _LazyImport("InvalidVersion")
|
|
|
|
class TorchVersion(str):
|
|
"""A string with magic powers to compare to both Version and iterables!
|
|
Prior to 1.10.0 torch.__version__ was stored as a str and so many did
|
|
comparisons against torch.__version__ as if it were a str. In order to not
|
|
break them we have TorchVersion which masquerades as a str while also
|
|
having the ability to compare against both packaging.version.Version as
|
|
well as tuples of values, eg. (1, 2, 1)
|
|
Examples:
|
|
Comparing a TorchVersion object to a Version object
|
|
TorchVersion('1.10.0a') > Version('1.10.0a')
|
|
Comparing a TorchVersion object to a Tuple object
|
|
TorchVersion('1.10.0a') > (1, 2) # 1.2
|
|
TorchVersion('1.10.0a') > (1, 2, 1) # 1.2.1
|
|
Comparing a TorchVersion object against a string
|
|
TorchVersion('1.10.0a') > '1.2'
|
|
TorchVersion('1.10.0a') > '1.2.1'
|
|
"""
|
|
# fully qualified type names here to appease mypy
|
|
def _convert_to_version(self, inp: Any) -> Any:
|
|
if isinstance(inp, Version.get_cls()):
|
|
return inp
|
|
elif isinstance(inp, str):
|
|
return Version(inp)
|
|
elif isinstance(inp, Iterable):
|
|
# Ideally this should work for most cases by attempting to group
|
|
# the version tuple, assuming the tuple looks (MAJOR, MINOR, ?PATCH)
|
|
# Examples:
|
|
# * (1) -> Version("1")
|
|
# * (1, 20) -> Version("1.20")
|
|
# * (1, 20, 1) -> Version("1.20.1")
|
|
return Version('.'.join(str(item) for item in inp))
|
|
else:
|
|
raise InvalidVersion(inp)
|
|
|
|
def _cmp_wrapper(self, cmp: Any, method: str) -> bool:
|
|
try:
|
|
return getattr(Version(self), method)(self._convert_to_version(cmp))
|
|
except BaseException as e:
|
|
if not isinstance(e, InvalidVersion.get_cls()):
|
|
raise
|
|
# Fall back to regular string comparison if dealing with an invalid
|
|
# version like 'parrot'
|
|
return getattr(super(), method)(cmp)
|
|
|
|
|
|
for cmp_method in ["__gt__", "__lt__", "__eq__", "__ge__", "__le__"]:
|
|
setattr(TorchVersion, cmp_method, lambda x, y, method=cmp_method: x._cmp_wrapper(y, method))
|
|
|
|
__version__ = TorchVersion(internal_version)
|