param json: json for the body to attach to the request (if files or data is not specified).
:param params: URL parameters to append to the URL. If a dictionary or
    list of tuples ``[(key, value)]`` is provided, form-encoding will
    take place.
:param auth: Auth handler or (user, pass) tuple.
:param cookies: dictionary or CookieJar of cookies to attach to this request.
:param hooks: dictionary of callback hooks, for internal usage.

Usage::

  >>> import requests
  >>> req = requests.Request('GET', 'https://httpbin.org/get')
  >>> req.prepare()
  <PreparedRequest [GET]>
Nc