import requests

url = "http://localhost/wiki/mw-core/api.php"

#Use a session insteadfor persistence

session = requests.Session()
results = session.get(url, params = {
  'format': 'json',
  'action': 'query',
  'meta': 'tokens',
  'type': 'createaccount'
})

print(results.json()['query']['tokens']['createaccounttoken'].encode("utf-8"))

token = results.json()['query']['tokens']['createaccounttoken'].encode("utf-8")

querystring = {
  "action": "createaccount",
  "createreturnurl": "http://localhost",
  "username": "ucheamaka",
  "email": "ucheamaka@example.com",
  "format": "json"
}

payload = {
  "createtoken": token,
  "password": "IlovePython",
  "retype": "IlovePython"
}

response = session.post(url, data = payload, params = querystring)

print(response.text)