Conversion of curl to Python Requests


I’m trying to convert the following working request in curl to a python request (using Requests).

curl --data 'query={"tags":["test1","test2"]}'

(I’ve used a fake url but the command does work with the real url)

The receiving end (ran in Flask) does this:

@app.route("/match", methods=['POST'])
def tagmatch():
    query = json.loads(request.form['query'])
    tags = query.get('tags')
    # ... does stuff ...
    return json.dump(stuff)

In curl (7.30), ran on Mac OS X (10.9) the command above properly returns a JSON list that’s filtered using the tag query.

My Python script is as follows, it returns a 400 Bad Request error.

import requests

payload = {"tags":["test1", "test2"]}
# also tried  payload = 'query={"tags":["test1","test2"]}'
url = ''

r =, data=payload)

if __name__=='__main__':
Asked By: zalc



From your code using requests and in Flask, it seems like you don’t post the right data format. The payload should be like this:

payload = {'query': {'tags': ['test1', 'test2']},}

This seems not normal as post data when using So if you have posted the html form here, it may have been more clear to solve the problem.
Here is another similar question: Using Python Requests to pass through a login/password

Answered By: flyer

Your server is expecting JSON, but you aren’t sending it. Try this:

import requests
import json

payload = {'query': json.dumps({"tags":["test1", "test2"]})}
url = ''

r =, data=payload)

if __name__=='__main__':
    print r.text
Answered By: Lukasa

There is an open source cURL to Python Requests conversion helper at It isn’t perfect, but helps out a lot of the time. Especially for converting Chrome "Copy as cURL" commands. There is also a node library if you need to do the conversions programmatically

screenshot of converting the given command to Python

Answered By: Gourneau

I wrote an HTTP client plugin for Sublime Text called Requester, and one of its features is to convert calls to cURL to Requests, and vice versa.

If you’re using Sublime Text this is probably your fastest, easiest option. If not, here’s the code that actually handles the conversion from cURL to Requests. It’s based uncurl, but with various improvements and bug fixes.

import argparse
import json
    from urllib.parse import urlencode, parse_qsl
except ImportError:  # works for Python 2 and 3
    from urllib import urlencode
    from urlparse import parse_qsl

if __name__ == "__main__":
    parser = argparse.ArgumentParser()
    parser.add_argument('-X', '--request', default=None)
    parser.add_argument('-d', '--data', default=None)
    parser.add_argument('-G', '--get', action='store_true', default=False)
    parser.add_argument('-b', '--cookie', default=None)
    parser.add_argument('-H', '--header', action='append', default=[])
    parser.add_argument('-A', '--user-agent', default=None)
    parser.add_argument('--data-binary', default=None)
    parser.add_argument('--compressed', action='store_true')

    parsed_args = parser.parse_args()

    method = 'get'
    if parsed_args.request:
        method = parsed_args.request

    base_indent = ' ' * 4
    post_data = or parsed_args.data_binary or ''
    if post_data:
        if not parsed_args.request:
            method = 'post'
            post_data = json.loads(post_data)
        except ValueError:
                post_data = dict(parse_qsl(post_data))

    cookies_dict = {}

    if parsed_args.cookie:
        cookies = parsed_args.cookie.split(';')
        for cookie in cookies:
            key, value = cookie.strip().split('=')
            cookies_dict[key] = value

    data_arg = 'data'
    headers_dict = {}
    for header in parsed_args.header:
        key, value = header.split(':', 1)
        if key.lower().strip() == 'content-type' and value.lower().strip() == 'application/json':
            data_arg = 'json'

        if key.lower() == 'cookie':
            cookies = value.split(';')
            for cookie in cookies:
                key, value = cookie.strip().split('=')
                cookies_dict[key] = value
            headers_dict[key] = value.strip()
    if parsed_args.user_agent:
        headers_dict['User-Agent'] = parsed_args.user_agent

    qs = ''
    if parsed_args.get:
        method = 'get'
            qs = '?{}'.format(urlencode(post_data))
            qs = '?{}'.format(str(post_data))
        post_data = {}

    result = """requests.{method}('{url}{qs}',{data}n{headers},n{cookies},n)""".format(
        data='n{}{}={},'.format(base_indent, data_arg, post_data) if post_data else '',
        headers='{}headers={}'.format(base_indent, headers_dict),
        cookies='{}cookies={}'.format(base_indent, cookies_dict),

You could make a script with this code, e.g., and call this script from the command line like so. It will work for both Python 2 and Python 3.

python curl -X POST -d 'key2=value2&key1=value1' ''

python curl -X POST -H 'Content-Type: application/json' -d '{"key2": "value2", "key1": "value1"}' ''

python curl -X POST -H 'Content-Type: application/json' -d '[1, 2, 3]' ''

python curl -X POST -H 'Content-Type: application/json' -d '{"name": "Jimbo", "age": 35, "married": false, "hobbies": ["wiki", "pedia"]}' ''

python curl -X GET ''

python curl -X GET -H 'key1: value1' -H 'key2: value2' ''

python curl -X GET -b 'key1=value1;key2=value2' ''
Answered By: kylebebak

try this:

import uncurl

print uncurl.parse("curl '' -H 
'Accept-Encoding: gzip,deflate,sdch'")
Answered By: Pegasus

Save your life

A simpler approach would be:

  1. Open POSTMAN
  2. Click on the “import” tab on the upper left side.
  3. Select the Raw Text option and paste your cURL command.
  4. Hit import and you will have the command in your Postman builder!

Hope this helps!

credit: Onkaar Singh

Answered By: MKRNaqeebi

Try to use uncurl library. It is pretty nice to do its job. I’ve tried it.

u = uncurl.parse(
        "curl -X GET '' -H  'accept: application/json' -H  'Authorization: 1234567890'")

It prints,

        "Authorization": "1234567890",
        "accept": "application/json"
Answered By: snr
Categories: questions Tags: , ,
Answers are sorted by their score. The answer accepted by the question owner as the best is marked with
at the top-right corner.