Form Value Won't Post/Submit

[SuperMetroid]

The html code of the form, and my code are below. I can't get the
value to post/submit.. instead I get an error. Can anyone help?

HTML Code of Form:
<form method='post' autocomplete='off'>
    <input type='hidden' name='action' value='grant-revoke' />
    <input type='hidden' name='creator_badge_index' value='1' />

    <input type='hidden' name='token'
value='92dcd92a8bc16f73f330d118ae1ed891' />
    <input type='hidden' name='do-grant' value='1' />
    <div id='grant-div'><span class='label'>Grant badge: </span><input
type='text' id='grant-userid' name='grant-userid' value='userid /
avatar name' /><input type='submit' value='Grant!' /></div>
</form>

My Code:
opener = urllib.request.build_opener()
cj = http.cookiejar.MozillaCookieJar()
cj.load('C:/Users/Alison/Documents/moz_cookies.txt')
opener = urllib.request.build_opener(urllib.request.HTTPCookieProcessor
(cj))

params = urllib.parse.urlencode({'grant-userid' : 'Guest_xLolKittyx'})
form = urllib.request.OpenerDirector.open('http://www.imvu.com/catalog/
web_manage_badges.php?action=grant-revoke&creator_badge_index=1',
params)
data = form.read()
form.close()
print(data)

Error Message:
Traceback (most recent call last):
  File "C:\Python31\htmlparser.py", line 34, in <module>
    form = urllib.request.OpenerDirector.open('http://www.imvu.com/
catalog/web_manage_badges.php?action=grant-
revoke&creator_badge_index=1', params)
  File "C:\Python31\lib\urllib\request.py", line 332, in open
    req = Request(fullurl, data)
  File "C:\Python31\lib\urllib\request.py", line 174, in __init__
    self._parse()
  File "C:\Python31\lib\urllib\request.py", line 179, in _parse
    raise ValueError("unknown url type: %s" % self.full_url)
ValueError: unknown url type: grant-userid=Guest_xLolKittyx