["python","json","python-requests","cherrypy"]
How can I POST JSON data with Python's Requests library?

I need to POST JSON content from a client to a server. I'm using Python 2.7.1 and simplejson. The client is using Requests. The server is CherryPy. I can GET hard-coded JSON content from the server (the code is not shown), but when I try to POST JSON content to the server, I get "400 Bad Request". Here is my client code: data = {'sender': 'Alice', 'receiver': 'Bob', 'message': 'We did it!'} data_json = simplejson.dumps(data) payload = {'json_payload': data_json} r = requests.post("http://localhost:8080", data=payload) Here is the server code. class Root(object): def __init__(self, content): self.content = content print self.content # This works exposed = True def GET(self): cherrypy.response.headers['Content-Type'] = 'application/json' return simplejson.dumps(self.content) def POST(self): self.content = simplejson.loads(cherrypy.request.body.read()) How can I fix this problem?
Starting with Requests version 2.4.2, you can use the json= parameter (which takes a dictionary) instead of data= (which takes a string) in the call: >>> import requests >>> r = requests.post('http://httpbin.org/post', json={"key": "value"}) >>> r.status_code 200 >>> r.json() {'args': {}, 'data': '{"key": "value"}', 'files': {}, 'form': {}, 'headers': {'Accept': '*/*', 'Accept-Encoding': 'gzip, deflate', 'Connection': 'close', 'Content-Length': '16', 'Content-Type': 'application/json', 'Host': 'httpbin.org', 'User-Agent': 'python-requests/2.4.3 CPython/3.4.0', 'X-Request-Id': 'xx-xx-xx'}, 'json': {'key': 'value'}, 'origin': 'x.x.x.x', 'url': 'http://httpbin.org/post'}