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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_name(modulename, name=None):
 """ Import identifier ``name`` from module ``modulename``. If ``name`` is omitted, ``modulename`` must contain the name after the module path, delimited by a colon. Parameters: modulename (str):
 Fully qualified module name, e.g. ``x.y.z``. name (str):
 Name to import from ``modulename``. Returns: object: Requested object. """

    if name is None:
        modulename, name = modulename.rsplit(':', 1)
    module = __import__(modulename, globals(), {}, [name])
    return getattr(module, name)