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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def send(self):
 """Sends the Slack message This public method sends the Slack message along with any attachments, then clears the attachments array. :return: None :raises: OSError """

        log = logging.getLogger(self.cls_logger + '.send')

        if self.attachments:
            self.payload['attachments'] = self.attachments

        # Encode payload in JSON
        log.debug('Using payload: %s', self.payload)
        try:
            json_payload = json.JSONEncoder().encode(self.payload)
        except(TypeError, ValueError, OverflowError):
            _, ex, trace = sys.exc_info()
            msg = 'There was a problem encoding the JSON payload\n{e}'.format(e=str(ex))
            raise OSError, msg, trace
        else:
            log.debug('JSON payload: %s', json_payload)

        # Post to Slack!
        log.debug('Posting message to Slack...')
        try:
            result = requests.post(url=self.webhook_url, data=json_payload)
        except requests.exceptions.ConnectionError:
            _, ex, trace = sys.exc_info()
            msg = '{n}: There was a problem posting to Slack\n{e}'.format(n=ex.__class__.__name__, e=str(ex))
            raise OSError, msg, trace

        # Check return code
        if result.status_code != 200:
            log.error('Slack post to url {u} failed with code: {c}'.format(c=result.status_code, u=self.webhook_url))
        else:
            log.debug('Posted message to Slack successfully.')

        # Clear out attachments after sending
        self.attachments = []
        self.payload.pop('attachments', None)