Byte String Spanning More Than One Line

I need to parse byte string which spans more than one line in the source code. Like this self.file.write(b'#compdef %s\n\n' '_arguments -s -A '-*' \\\n' % (self

Solution 1:

You are fine to use multiple string literals, but they need to be of the same type. You are missing the b prefix on the second line:

self.file.write(b'#compdef %s\n\n'
                b'_arguments -s -A "-*" \\\n' % (self.cmdName,))

Only when using string literals of the same type will the python parser merge these into one longer bytes string object.

It worked on Python 2 because the b prefix is a no-op; b'..' and '..' produce the same type of object. The b prefix only exists in Python 2 to make it easier to write code for both Python 2 and 3 in the same codebase (polyglot).