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# encoding: utf-8

"""

A simple utility to import something by its string name.

Authors:

* Brian Granger

"""

#-----------------------------------------------------------------------------

# Copyright (C) 2008-2011 The IPython Development Team

#

# Distributed under the terms of the BSD License. The full license is in

# the file COPYING, distributed as part of this software.

#-----------------------------------------------------------------------------

#-----------------------------------------------------------------------------

# Functions and classes

#-----------------------------------------------------------------------------

def import_item(name):

"""Import and return bar given the string foo.bar."""

package = '.'.join(name.split('.')[0:-1])

obj = name.split('.')[-1]

# Note: the original code for this was the following. We've left it

# visible for now in case the new implementation shows any problems down

# the road, to make it easier on anyone looking for a problem. This code

# should be removed once we're comfortable we didn't break anything.

## execString = 'from %s import %s' % (package, obj)

## try:

## exec execString

## except SyntaxError:

## raise ImportError("Invalid class specification: %s" % name)

## exec 'temp = %s' % obj

## return temp

if package:

module = __import__(package,fromlist=[obj])

try:

pak = module.__dict__[obj]

except KeyError:

raise ImportError('No module named %s' % obj)

return pak

else:

return __import__(obj)