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Functional Python Programming - Second Edition
book

Functional Python Programming - Second Edition

by Steven F. Lott
April 2018
Intermediate to advanced content levelIntermediate to advanced
408 pages
10h 42m
English
Packt Publishing
Content preview from Functional Python Programming - Second Edition

Using map() with multiple sequences

Sometimes, we'll have two collections of data that need to be parallel to each other. In Chapter 4, Working with Collections, we saw how the zip() function can interleave two sequences to create a sequence of pairs. In many cases, we're really trying to do something like the following:

map(function, zip(one_iterable, another_iterable))  

We're creating argument tuples from two (or more) parallel iterables and applying a function to the argument tuple. We can also look at it as follows:

(function(x,y)     for x,y in zip(one_iterable, another_iterable))

Here, we've replaced the map() function with an equivalent generator expression.

We might have the idea of generalizing the whole thing to the following:

def ...
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Functional Python Programming - Third Edition

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Publisher Resources

ISBN: 9781788627061Supplemental Content