how to write multiple lines in python code example

Example 1: python how to write code over multiple lines

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

Example 2: python make return on multiple lines

# Python return on multiple lines with '()'
# Instead of:
return <something to return> + <something else to return>
# Use:
return (<something to return> +
        <something else to return>)

Example 3: python continue to a new line

a = "This" + " is" + " a" + \
	" multi-line" + " statement"