def create_range(start_version_string, end_version_string):
start = UnboundedVersionSpecifier()
end = UnboundedVersionSpecifier()
if start_version_string is not None:
start = VersionSpecifier.from_version_string(start_version_string)
if end_version_string is not None:
end = VersionSpecifier.from_version_string(end_version_string)
return VersionRange(start=start, end=end)
def _sanitize_version(cls, version):
version = [
v if isinstance(v, VersionSpecifier) else
VersionSpecifier.from_version_string(v)
for v in cls.version_to_list(version)
]
return version or [UnboundedVersionSpecifier()]