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"""A shim module for deprecated imports
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"""
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# Copyright (c) IPython Development Team.
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# Distributed under the terms of the Modified BSD License.
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import sys
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import types
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class ShimModule(types.ModuleType):
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def __init__(self, *args, **kwargs):
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self._mirror = kwargs.pop("mirror")
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super(ShimModule, self).__init__(*args, **kwargs)
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if sys.version_info >= (3,4):
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self.__spec__ = __import__(self._mirror).__spec__
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def __getattr__(self, key):
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# Use the equivalent of import_item(name), see below
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name = "%s.%s" % (self._mirror, key)
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# NOTE: the code below was copied *verbatim* from
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# importstring.import_item. For some very strange reason that makes no
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# sense to me, if we call it *as a function*, it doesn't work. This
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# has something to do with the deep bowels of the import machinery and
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# I couldn't find a way to make the code work as a standard function
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# call. But at least since it's an unmodified copy of import_item,
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# which is used extensively and has a test suite, we can be reasonably
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# confident this is OK. If anyone finds how to call the function, all
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# the below could be replaced simply with:
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#
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# from IPython.utils.importstring import import_item
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# return import_item('MIRROR.' + key)
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parts = name.rsplit('.', 1)
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if len(parts) == 2:
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# called with 'foo.bar....'
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package, obj = parts
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module = __import__(package, fromlist=[obj])
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return getattr(module, obj)
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else:
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# called with un-dotted string
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return __import__(parts[0])
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