how to break a line of code in python code example

Example 1: line break in python code

a = '1' + '2' + '3' + \
    '4' + '5'

#preferred by style guide
a = ('1' + '2' + '3' +
    '4' + '5')

Example 2: break a line python

a = '1' + '2' + '3' + \
    '4' + '5'