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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 stash_split(fqdn, result, *argl, **argd):
 """Stashes the split between training and testing sets so that it can be used later for automatic scoring of the models in the log. """

    global _splits
    if fqdn == "sklearn.cross_validation.train_test_split":
        key = id(result[1])
        _splits[key] = result

    #We don't actually want to return anything for the analysis; we are using it
    #as a hook to save pointers to the dataset split so that we can easily
    #analyze performance later on.
    return None