Amazon Web Services (AWS) Lambda is currently a good alternative until Google Cloud Functions supports Python.
Serverless Cost Calculator estimates the amount that AWS would charge based on Lambda exeuctions, average execution time and memory needed per execution.
Microsoft Azure Functions vs. Google Cloud Functions vs. AWS Lambda gives an overview of these three serverless cloud platforms and compares their current capabilities.
Easily deploy your Python web apps to Digital Ocean's reliable cloud computing platform.
Fix errors in your Python code before your users see them by monitoring with Rollbar.
Scout monitors the performance of your Python apps, identifying slow queries, memory bloat, and more. Free during Tech Preview.