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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 get_stack(method_name):
 """ Returns the stack trace to hash to identify a call descriptor :param str method_name: The calling method. :rtype str: """

    global test_suite
    trace_string      = method_name + " "
    for f in inspect.stack():
        module_name = os.path.basename(f[1])
        method_name = f[3]
        trace_string = trace_string + "%s %s " % (module_name, method_name)
        if test_suite and module_name == test_suite or (module_name == 'patch.py' and method_name == 'patched_test'):
            return trace_string
    return trace_string