How Can I Apply a Function to Every Element in a Python List?

Mapping Functions over List Elements

Given a list, a common task is to apply a function to each element. For instance, consider the list:

mylis = ['this is test', 'another test']

To convert each element to uppercase, we could use str.upper. How do we achieve this for all elements in the list?

Using List Comprehension

One efficient method is to employ a list comprehension:

[item.upper() for item in mylis]

This comprehension iterates through each element in mylis and applies str.upper, resulting in a new list with the transformed elements:

['THIS IS TEST', 'ANOTHER TEST']

By leveraging list comprehension, we can conveniently and concisely perform operations on each element of a list.

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