How Can I Break Long Lines of Python Code Without Syntax Errors?

Line Breaks in Python for Long Source Code

Problem "Line breaks (line continuation) in Python 3"

In Python, how can we split a lengthy line of code into multiple lines without violating syntax rules?

Solution

Implicit Continuation with Parentheses or Explicit Line Break

Python offers two options for line continuation:

• Implicit Continuation (Preferred): Arguments or statements can be placed on the next line without any special notation.

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

• Explicit Line Break: Use a backslash at the end of the line to force a line break.

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

Using Parentheses

For expressions that span multiple lines, parentheses can be used for implicit continuation.

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

Note: The style guide recommends using implicit continuation with parentheses, but in specific situations like OP's example, it may not be appropriate.

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