/usr/lib/python2.7/dist-packages/ipapython/install/typing.py is in python-ipalib 4.7.0~pre1+git20180411-2ubuntu2.
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# Copyright (C) 2016 FreeIPA Contributors see COPYING for license
#
import weakref
import six
_cache = weakref.WeakValueDictionary()
class ListMeta(type):
def __getitem__(cls, key):
if not isinstance(key, type):
raise TypeError("Parameters to generic types must be types. "
"Got {!r}.".format(key))
t = ListMeta(
cls.__name__,
cls.__bases__,
{
'__parameters__': (key,),
'__init__': cls.__init__,
}
)
return _cache.get(key, t)
class List(six.with_metaclass(ListMeta, list)):
__parameters__ = ()
def __init__(self, *_args, **_kwargs):
raise TypeError("Type List cannot be instantiated; use list() instead")
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