Writing the dict_helper() function

The dict_helper() function is a one-line function, and is less than six lines of documentation. It utilizes the named_tuple data structure, which is passed in as the keys variable and calls the _make() and _asdict() functions to create our ordered dictionary after struct parses the values:

229 def dict_helper(data, format, keys):
230     """
231     The dict_helper function creates an OrderedDictionary from
232     a struct tuple.
233     :param data: The data to be processed with struct.
234     :param format: The struct format string.
235     :param keys: A string of the keys for the values in the struct
236     tuple.
237     :return: An OrderedDictionary with descriptive keys of
238     struct-parsed values.
239     """
240     return keys._asdict(keys._make(struct.unpack(format, data)))

As with most compact one-liners, it's possible to lose the meaning of the function as readability starts to decrease when more functions are called in a single line. We're going to introduce and use the built-in Python debugger to take a look at what is going on.