Hhh... a high-rep user complained why someone's "no research effort" question being downvoted, with a reason: this site is not a professional site unlike SO, no need to downvote...
Google Colaboratory is neat; nothing fancy, just a no-hassle way to work with Jupyter notebooks which are stored in Google Drive, with all up-to-date sciency Python things. Except... Python 2.7 :/
user315433
The interface reliably connects to runtime, which is more than I can say about CoCalc