Map is a powerful function that not only gives us new ways to transform data, but also aids us in reducing our code to just a few efficient lines in s

How to Use Python Map()

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2021-07-26 08:30:03

Map is a powerful function that not only gives us new ways to transform data, but also aids us in reducing our code to just a few efficient lines in some select cases.

We will be looking at using Python built-in functions as well as custom functions in Python as an argument to the map function and the reader is therefore expected to also have written at least a few simple functions using Python.

The code in this example has been tested using Python 3.8.8 though the map function has been around much longer. The code hence will work with earlier versions of Python as well.

Map is an important function in the functional programming paradigm of Python. In functional programming, a function/set of functions operate on a piece of data to transform it. map is an excellent function to learn, to cut down on the amount of code that for loops take up.

If the data was a set of integers, examples of transformation on this data could include squaring the numbers, calculating their factorials, a Fibonacci sequence, etc. If the data were a set of sentences, we might consider stripping these sentences of punctuation. If the data were a set of words, we could capitalize the first letter of each word, etc.

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