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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 load_feedback():
 """ Open existing feedback file """

    result = {}
    if os.path.exists(_feedback_file):
        f = open(_feedback_file, 'r')
        cont = f.read()
        f.close()
    else:
        cont = '{}'

    try:
        result = json.loads(cont) if cont else {}
    except ValueError as e:
        result = {"result":"crash", "text":"Feedback file has been modified by user !"}
    return result