pypy-lib 5.1.2+dfsg-1~16.04 (amd64 binary) in ubuntu xenial

 The PyPy standard library. This is a combination of modules, copied directly
 from cpython, modified cpython modules, and modules entirely re-implemented
 (usually in pure Python, where they are C extensions in cpython).
 .
 PyPy is a fast, compliant alternative implementation of the Python language
 (2.7).