#! /usr/bin/env python
# -*- coding: utf-8 -*-
# vi:ts=4:et

import pycurl
try:
    from io import BytesIO
except ImportError:
    from StringIO import StringIO as BytesIO

c = pycurl.Curl()
c.setopt(c.URL, 'https://httpbin.org/put')

c.setopt(c.UPLOAD, 1)
data = '{"json":true}'
# READDATA requires an IO-like object; a string is not accepted
# encode() is necessary for Python 3
buffer = BytesIO(data.encode('utf-8'))
c.setopt(c.READDATA, buffer)

c.perform()
c.close()