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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 main(argv=None):
 """Execute each module in the same interpreter. Args: argv: Each item of argv will be treated as a separate module with potential arguments each item may be a string or a sequence of strings. If a given argument is a string, then treat string as shell arguments and split accordingly. If the given argument is a tuple or list, then assume that the given arguments are already parsed. The first item of each argument should be a module or module path """

    if argv is None:
        argv = sys.argv[1:]
    args = _get_parser().parse_args(argv)
    mand(args.module_seq)