Message5176

From where I'm standing this looks like a bug in the gdata API. CPython
does intern these kinds of strings, but there are no guarantees in
Python as a language that this kind of interning will be done. The 'is'
comparator is an identity equals comparator, nothing else. And interning
of strings that look like identifiers is a performance optimization in
CPython, any code comparing strings with 'is'/'is not' when identity
equality isn't what they are after (this is almost never the case with
strings) is faulty.