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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_gssapi_extension(name):
 """Import a GSSAPI extension module This method imports a GSSAPI extension module based on the name of the extension (not including the 'ext_' prefix). If the extension is not available, the method retuns None. Args: name (str):
 the name of the extension Returns: module: Either the extension module or None """


    try:
        path = 'gssapi.raw.ext_{0}'.format(name)
        __import__(path)
        return sys.modules[path]
    except ImportError:
        return None