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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 gen_cartesian_product(*args):
 """ generate cartesian product for lists Args: args (list of list):
 lists to be generated with cartesian product Returns: list: cartesian product in list Examples: [ {'a': 1, 'x': 111, 'y': 112}, {'a': 1, 'x': 121, 'y': 122}, {'a': 2, 'x': 111, 'y': 112}, {'a': 2, 'x': 121, 'y': 122} ] """

    if not args:
        return []
    elif len(args) == 1:
        return args[0]

    product_list = []
    for product_item_tuple in itertools.product(*args):
        product_item_dict = {}
        for item in product_item_tuple:
            product_item_dict.update(item)

        product_list.append(product_item_dict)

    return product_list