It's fixed already in Python 3. Please use Python 3 when teaching to students.
$ python3 Python 3.6.0 (default, Dec 24 2016, 00:01:50) [GCC 4.2.1 Compatible Apple LLVM 8.0.0 (clang-800.0.42.1)] on darwin Type "help", "copyright", "credits" or "license" for more information. >>> True = "foo" File "<stdin>", line 1 SyntaxError: can't assign to keyword -- https://mail.python.org/mailman/listinfo/python-list
