Test on PyPy

[sylvinus]

We could use testing code from https://github.com/commonsearch/gumbocy

[ev1351]

ERROR: Command errored out with exit status 1:
command: /usr/bin/python3 -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-eglzy0ga/urlparse4/setup.py'"'"'; file='"'"'/tmp/pip-install-eglzy0ga/urlparse4/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(file);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, file, '"'"'exec'"'"'))' egg_info --egg-base /tmp/pip-pip-egg-info-jwjpxc_0
cwd: /tmp/pip-install-eglzy0ga/urlparse4/
Complete output (6 lines):
Traceback (most recent call last):
File "", line 1, in
File "/tmp/pip-install-eglzy0ga/urlparse4/setup.py", line 46
print "urlparse4/gurl.cpp not found and Cython failed to run to recreate it. Please install/upgrade Cython and try again."
^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print("urlparse4/gurl.cpp not found and Cython failed to run to recreate it. Please install/upgrade Cython and try again.")?
----------------------------------------
ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.

how to solve this