What is difference between
'xaa'? What does the
x part mean? And which chapter of the Python documentation covers this topic?
That’s unicode character escaping. See “Unicode Constructors” on PEP 100
x escape sequence means the next two characters are interpreted as hex digits for the character code, so
chr(16 * 10 + 10) — a small raised lowercase
Escape sequences are documented in a short table here in the Python docs.