Lambda - Bitbucket, change PR description

lambda.py

import json
from botocore.vendored import requests
import os

def lambda_handler(event, context):
    payload = json.loads(event['body'], encoding='utf8')
    title = payload["pullrequest"]["title"]
    description = payload['pullrequest']['description']
    with open('checklist.txt') as f:
        extra_text = f.read()
        description += f'\n  \n{extra_text}'
    # Make request to Bitbucket API
    # /2.0/repositories/{workspace}/{repo_slug}/pullrequests/{pull_request_id}
    apiRoute = payload['pullrequest']['links']['self']['href']
   
    payload = json.dumps({"title": title, "description": description})
    appid = os.environ['bitbucketappid']
    username = os.environ['username']
    headers = {
        'Content-Type': 'application/json'
    }
    auth=requests.auth.HTTPBasicAuth(username, appid)
    response = requests.request("PUT", apiRoute, headers=headers, data = payload, auth=auth)
   
   
    return {"statusCode": 200}