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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 classify_segmented_recording(recording, result_format=None):
 """Use this function if you are sure you have a single symbol. Parameters recording : string The recording in JSON format Returns ------- list of dictionaries Each dictionary contains the keys 'symbol' and 'probability'. The list is sorted descending by probability. """

    global single_symbol_classifier
    if single_symbol_classifier is None:
        single_symbol_classifier = SingleClassificer()
    return single_symbol_classifier.predict(recording, result_format)