Particularly: pypy outputs a two-line version string like: Python 2.7.10 (850edf14b2c75573720f59e95767335fb1affe55, Oct 30 2015, 00:18:28) [PyPy 4.0.0 with GCC 4.2.1 Compatible Apple LLVM 7.0.0 (clang-700.1.76)]
Also functools is implemented in python so shows up on the stack.