Lambda function that puts a hello-world log message into CloudWatch Logs, just to test connectivity and permissions.

put_one_log_event.py

import json
import boto3
import time

def lambda_handler(event, context):
    LOG_GROUP='awesome-logs'
    LOG_STREAM='test'
    
    logs = boto3.client('logs')
    logs.create_log_stream(logGroupName=LOG_GROUP, logStreamName=LOG_STREAM)
    
    timestamp = int(round(time.time() * 1000))
    
    response = logs.put_log_events(
        logGroupName=LOG_GROUP,
        logStreamName=LOG_STREAM,
        logEvents=[
            {
                'timestamp': timestamp,
                'message': 'Hello world, here is our first log message!'
            }
        ]
    )