human
Complete the below
def json_method(method):

    ''''Do a %(method)s request.  Very like the
    :class:`~webtest.TestApp.%(lmethod)s` method.
    ``params`` are dumped to json and put in the body of the request.
    Content-Type is set to ``application/json``.
    Returns a :class:`webtest.TestResponse` object.'
    '''
 ... Give me a the Python code you requested?
assistant
#Here is the Python code you requested.
    def wrapper(self, url, params=NoDefault, **kw):
        content_type = 'application/json'
        if (params is not NoDefault):
            params = dumps(params, cls=self.JSONEncoder)
        kw.update(params=params, content_type=content_type, upload_files=None)
        return self._gen_request(method, url, **kw)
    subst = dict(lmethod=method.lower(), method=method)
    wrapper.__doc__ = (json_method.__doc__ % subst)
    wrapper.__name__ = str(('%(lmethod)s_json' % subst))
    return wrapper