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# encoding: utf-8
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"""
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A simple utility to import something by its string name.
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Authors:
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* Brian Granger
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"""
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#-----------------------------------------------------------------------------
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# Copyright (C) 2008-2011 The IPython Development Team
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#
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# Distributed under the terms of the BSD License. The full license is in
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# the file COPYING, distributed as part of this software.
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#-----------------------------------------------------------------------------
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#-----------------------------------------------------------------------------
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# Functions and classes
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#-----------------------------------------------------------------------------
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def import_item(name):
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"""Import and return bar given the string foo.bar."""
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package = '.'.join(name.split('.')[0:-1])
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obj = name.split('.')[-1]
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# Note: the original code for this was the following. We've left it
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# visible for now in case the new implementation shows any problems down
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# the road, to make it easier on anyone looking for a problem. This code
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# should be removed once we're comfortable we didn't break anything.
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## execString = 'from %s import %s' % (package, obj)
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## try:
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## exec execString
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## except SyntaxError:
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## raise ImportError("Invalid class specification: %s" % name)
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## exec 'temp = %s' % obj
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## return temp
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if package:
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module = __import__(package,fromlist=[obj])
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try:
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pak = module.__dict__[obj]
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except KeyError:
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raise ImportError('No module named %s' % obj)
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return pak
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else:
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return __import__(obj)
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