webhooks.py

import requests
import json

USER_TOKEN = 'token'
API_BASE = 'https://discordapp.com/api'

class Embeds:
    def __init__(self, data):
        basic_keys = ('title', 'type', 'description', 'url', 'timestamp', 'color',
                      'footer', 'image', 'thumbnail', 'provider', 'author')
        for key in basic_keys:
            setattr(self, key, data.get(key))

        self.fields = data.get('fields', [])

class User:
    def __init__(self, data):
        self.username = data['username']
        self.discriminator = data['discriminator']
        self.id = int(data['id'])
        self.avatar = data['avatar']

class Webhook:
    def __init__(self, data):
        self.name = data['name']
        self.channel_id = int(data['channel_id'])
        self.guild_id = int(data['guild_id'])
        self.id = int(data['id'])
        self.avatar = data['avatar']
        self.token = data['token']
        self.user = User(data['user'])

    def execute(self, content, **kwargs):
        payload = {
            'content': content,
            'username': kwargs.get('username')
        }

        headers = {
            'Authorization': USER_TOKEN
        }

        url = '%s/webhooks/%s/%s' % (API_BASE, self.id, self.token)
        r = requests.post(url, json=payload, headers=headers)
        r.raise_for_status()


def create_channel_webhook(channel_id, *, name: str):
    payload = {
        'name': name,
        'avatar': None
    }

    headers = {
        'Authorization': USER_TOKEN
    }
    url = '%s/channels/%s/webhooks' % (API_BASE, channel_id)
    resp = requests.post(url, json=payload, headers=headers)
    resp.raise_for_status()
    return Webhook(resp.json())

if __name__ == '__main__':
    thing = create_channel_webhook(84319995256905728, name='testing')
    print(thing.__dict__)
    thing.execute(content='hello')