AWS Lambda function to control Nissan Leaf climate control

lambda_function.py

import json
import pycarwings2
import time

config = {}

def param(event,key):
    try:
        return event['queryStringParameters'][key]
    except:
        body = json.loads(event['body'])
        return body[key]

def lambda_handler(event, context):
    for p in ['username','password','region','command']:
        try:
            config[p] = param(event,p)
        except Exception:
            return {
                'statusCode': 500,
                'headers': {'Content-Type': 'application/json'},
                'body': json.dumps('Could not get ' + p)
            }

    try:
        s = pycarwings2.Session(config['username'], config['password'], config['region'])
        leaf = s.get_leaf()
    except Exception as e:
        return {
            'statusCode': 500,
            'headers': {'Content-Type': 'application/json'},
            'body': json.dumps(str(e))
        }


    for i in range(0, 5):
        try:
            if config['command'] == 'startclimate':
                msg = "Starting climate control"
                leaf.start_climate_control()

            if config['command'] == 'stopclimate':
                msg = "Stopping climate control"
                leaf.stop_climate_control()
                    
        except Exception:
            time.sleep(2)
            continue
        break

    return {
        'statusCode': 200,
        'body': json.dumps(msg)
    }