'Write data to facebook
**Example**::
open_facebook.set(\'me/feed\', message=\'testing open facebook\')
:param path:
The path to use for making the API call
:param params:
A dictionary of get params
:param post_data:
The kwargs for posting to facebook
:returns:  dict'

def set(self, path, params=None, version=None, **post_data):

    version = (version or self.version)
    assert self.access_token, 'Write    operations    require    an    access    token'
    if (not params):
        params = {}
    params['method'] = 'post'
    params['version'] = version
    response = self.request(path, post_data=post_data, **params)
    return response
