The semantics of augmented assignment are (slightly) different than normal assignment:<p><a href="https:&#x2F;&#x2F;docs.python.org&#x2F;3.4&#x2F;reference&#x2F;simple_stmts.html#grammar-token-augmented_assignment_stmt" rel="nofollow">https:&#x2F;&#x2F;docs.python.org&#x2F;3.4&#x2F;reference&#x2F;simple_stmts.html#gram...</a>