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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _import_module(module_name):
 """ Imports the module dynamically _import_module('foo.bar') calls: __import__('foo.bar', globals(), locals(), ['bar', ], 0) """

    fromlist = []
    dot_position = module_name.rfind('.')
    if dot_position > -1:
        fromlist.append(
            module_name[dot_position+1:len(module_name)]
        )

    # Import module
    module = __import__(module_name, globals(), locals(), fromlist, 0)

    return module