<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def main():
 """Main function calls the test functs"""


    print("Python version %s" % sys.version)

    print("Testing compatibility for function defined with *args")
    test_func_args(func_old_args)
    test_func_args(func_new)

    print("Testing compatibility for function defined with **kwargs")
    test_func_kwargs(func_old_kwargs)
    test_func_kwargs(func_new)

    print("All tests successful - we can change *args and **kwargs to' \
          ' named args.")
    return 0