python3.x上post发送json数据

eg:
import json
str = json.dumps({'userid':'381fccbd776c4deb'})

eg:

import http.client,urllib.parse
import json

str = json.dumps({'userid':'381fccbd776c4deb'})
print(str)

#下面注释部分这样做是不行的
#pararms = urllib.parse.urlencode({'userid':'381fccbd776c4deb'}).encode(encoding='UTF8')
headers = {"Content-type": "application/x-www-form-urlencoded","Accept": "text/plain"}
conn = http.client.HTTPConnection("10.3.93.216",8080)
conn.request('POST', '/ippinte/api/scene/getall', str, headers)
response = conn.getresponse()
print(response.status, response.reason)
data = response.read().decode('utf-8')
print(data)
conn.close()