Getting these kind of errors on Appveyor which uses mingw/cygwin to run
a Python interpreter:
Native windows Python 3.6 running under cygwin and mingw Python 3.7 running under mingw:
Fatal Python error: _Py_HashRandomization_Init: failed to get random
numbers to initialize Python
Cygwin Python 2.7 running under cygwin:
0 [main] python2.7 496 child_info_fork::abort: address space needed by '_foo.dll' (0x6D0000)
is already occupied