The itertools.starmap() function is a variation on the map() higher-order function. The map() function applies a function against each item from a sequence. The starmap(f, S) function presumes each item, i, from the sequence, S, is a tuple, and uses f(*i). The number of items in each tuple must match the number of parameters in the given function.
Here's an example:
>>> d = starmap(pow, zip_longest([], range(4), fillvalue=60))
The itertools.zip_longest() function will create a sequence of pairs, such as the following:
[(60, 0), (60, 1), (60, 2), (60, 3)]
It does this because we provided two sequences: the [] brackets and the range(4) parameter. The fillvalue parameter will be used when the shorter sequence runs out of data.
When we use the starmap() function, each pair becomes the argument to the given function. In this case, we provided...
