How to use Python to execute a cURL command?

I want to execute a curl command in Python.

Usually, I just need to enter the command in the terminal and press the return key. However, I don’t know how it works in Python.

The command shows below:

curl -d @request.json --header "Content-Type: application/json" https://www.googleapis.com/qpxExpress/v1/trips/search?key=mykeyhere

There is a request.json file to be sent to get a response.

I searched a lot and got confused. I tried to write a piece of code, although I could not fully understand it and it didn’t work.

import pycurl
import StringIO

response = StringIO.StringIO()
c = pycurl.Curl()
c.setopt(c.URL, 'https://www.googleapis.com/qpxExpress/v1/trips/search?key=mykeyhere')
c.setopt(c.WRITEFUNCTION, response.write)
c.setopt(c.HTTPHEADER, ['Content-Type: application/json','Accept-Charset: UTF-8'])
c.setopt(c.POSTFIELDS, '@request.json')
c.perform()
c.close()
print response.getvalue()
response.close()

The error message is Parse Error. How to get a response from the server correctly?

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