import os
import json
import difflib
def test():
    cmd2 = 'E:/Python27/python.exe -c "import keyword;import json;print (json.dumps(keyword.kwlist))"'
    cmd3 = 'C:/Python36/python.exe -c "import keyword;import json;print (json.dumps(keyword.kwlist))"'
    res2 = json.loads(os.popen(cmd2).read())
    res3 = json.loads(os.popen(cmd3).read())
    d = difflib.Differ()
    diff = d.compare(res2, res3)
    print '\n'.join(diff)
if __name__ == '__main__':
    test()