Python and PHP communication garble problem solution

It is useless to encode STR. Decode (" cp936 "). Encode (" utf-8 ") before urlencode. Later query manual found a urllib.quote() function, with this method successfully solved!
Python side:

str = " Chinese "
str = urllib.quote(str.decode("cp936").encode("utf-8"))
postData = {}
postData['str'] = str
...post Request sending code ...

The PHP side:

$str = urldecode($_POST['str'])
echo $str;

Perfect solution to the problem of garbled code!