def run_example(path):
    """ Returns returncode of example """
    cmd = "{0} {1}".format(sys.executable, path)
    proc = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
    res = proc.communicate()
    if proc.returncode:
        print(res[1].decode())
    return proc.returncode
Returns returncode of example