import requests

with open('test.json') as data:
    headers = {'Authorization': 'Bearer 26lhbngfsybdayabz6afrc6dcd'
               'Content-Type' : 'application/json'}
    r = requests.post('https://api.smartsheet.com/1.1/sheets',
                         headers=headers, data=data)

print r.json

import pycurl

with open('test.json') as json:
    data = json.read()

c = pycurl.Curl()
c.setopt(pycurl.URL, 'https://api.smartsheet.com/1.1/sheets')
c.setopt(pycurl.POST, 1)
c.setopt(pycurl.POSTFIELDS, data)
c.setopt(pycurl.HTTPHEADER, ['Authorization: Bearer 26lhbngfsybdayabz6afrc6dcd',
                             'Content-Type: application/json'])

c.perform()