How Can I Break Long Lines of Python Code for Better Readability?

Continuation in Python

Python has a mechanism known as line break or line continuation, which enables splitting long source code lines into multiple lines for readability. In other words, it allows you to break a line into multiple lines without affecting the logic of your code.

Method Overview

Continuation with Arguments

The most straightforward approach is to place arguments on the next line without adding a special character or symbol. For example, an expression with multiple arguments can be written over multiple lines like this:

a = dostuff(blahblah1, blahblah2, 
            blahblah3, blahblah4, blahblah5, 
            blahblah6, blahblah7)

Explicit Line Break

Another method involves using an explicit line break, indicated by the backslash character (). This line break character allows you to split a line without using parentheses or other symbols. Here's an example:

if a == True and \
   b == False:

Continuation with Parentheses

Using parentheses, you can also write an expression over multiple lines. In this case, the closing parenthesis should be on a new line. For example:

a = ('1' + '2' + '3' +
    '4' + '5')

Comparison and Style

According to the Python Style Guide, implicit continuation with parentheses is preferred. However, it's crucial to consider the context and readability when applying this technique.

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