|
|
"""A shim module for deprecated imports
|
|
|
"""
|
|
|
# Copyright (c) IPython Development Team.
|
|
|
# Distributed under the terms of the Modified BSD License.
|
|
|
|
|
|
import types
|
|
|
|
|
|
class ShimModule(types.ModuleType):
|
|
|
|
|
|
def __init__(self, *args, **kwargs):
|
|
|
self._mirror = kwargs.pop("mirror")
|
|
|
super(ShimModule, self).__init__(*args, **kwargs)
|
|
|
|
|
|
@property
|
|
|
def __spec__(self):
|
|
|
"""Don't produce __spec__ until requested"""
|
|
|
return __import__(self._mirror).__spec__
|
|
|
|
|
|
def __getattr__(self, key):
|
|
|
# Use the equivalent of import_item(name), see below
|
|
|
name = "%s.%s" % (self._mirror, key)
|
|
|
|
|
|
# NOTE: the code below was copied *verbatim* from
|
|
|
# importstring.import_item. For some very strange reason that makes no
|
|
|
# sense to me, if we call it *as a function*, it doesn't work. This
|
|
|
# has something to do with the deep bowels of the import machinery and
|
|
|
# I couldn't find a way to make the code work as a standard function
|
|
|
# call. But at least since it's an unmodified copy of import_item,
|
|
|
# which is used extensively and has a test suite, we can be reasonably
|
|
|
# confident this is OK. If anyone finds how to call the function, all
|
|
|
# the below could be replaced simply with:
|
|
|
#
|
|
|
# from IPython.utils.importstring import import_item
|
|
|
# return import_item('MIRROR.' + key)
|
|
|
|
|
|
parts = name.rsplit('.', 1)
|
|
|
if len(parts) == 2:
|
|
|
# called with 'foo.bar....'
|
|
|
package, obj = parts
|
|
|
module = __import__(package, fromlist=[obj])
|
|
|
return getattr(module, obj)
|
|
|
else:
|
|
|
# called with un-dotted string
|
|
|
return __import__(parts[0])
|
|
|
|
