python request 发送form-data 格式数据

# !/usr/bin/env python
# -*- coding: utf-8 -*-
import sys
reload(sys)
sys.path.append('./python2.7/site-packages')
sys.path.append('./python2.7/site-packages/requests_toolbelt-0.8.0-py2.7.egg')
print sys.path
import urllib2
import urllib
import cookielib
import json
import httplib
import re
import requests
import random
from requests_toolbelt import MultipartEncoder
if len(sys.argv) != 7:
    print sys.argv[0] + ' ' +'deploy_name'+' '+ 'apk_name' + ' ' + 'promptInfo' + ' ' + 'versionDesc' + ' ' + 'versionLargeNumber' +' '+'applications.id'
    sys.exit()
deploy_name=sys.argv[1]
apk_name=sys.argv[2]
promptInfo=sys.argv[3]
vers