Python HTTP POST with JSON body using api.imgflip.com as example

requests.py

import requests


url = 'https://api.imgflip.com/caption_image'

payload = {
    'username': "imgflip_hubot",
    'password': "imgflip_hubot",
    'template_id': "101470",
    'text1': 'Robots',
}

response = requests.post(url, data=payload)

print response.text

urllib.py

import urllib

url = 'https://api.imgflip.com/caption_image'

payload = {
    'username': "imgflip_hubot",
    'password': "imgflip_hubot",
    'template_id': "101470",
    'text1': 'Robots',
}

data = urllib.urlencode(payload)
response = urllib.urlopen(url, data)

print response.read()

urllib2.py

import urllib2
from urllib import urlencode

import json

url = 'https://api.imgflip.com/caption_image'

payload = {
    'username': "imgflip_hubot",
    'password': "imgflip_hubot",
    'template_id': "101470",
    'text1': 'Robots',
}
data = urlencode(payload)

request = urllib2.Request(url)
request.add_header('User-Agent', "Mozilla/5.0")

response = urllib2.urlopen(request, data)

content = json.loads(response.read())