Redash: Python query runner cannot use "print" function in 9.0.0-alpha

[bryanyang0528]

Issue Summary

Python version: 3.7.6
Redash version: 9.0.0-a;pha
Python query runner cannot use "print" function in 9.0.0-alpha

Steps to Reproduce

1. export REDASH_ENABLED_QUERY_RUNNERS=redash.query_runner.python
2. Use python query runner
3. print('x') and execute it

Any other info e.g. Why do you consider this to be a bug? What did you expect to happen instead?

• In previous version, if I call print, it will be put in the log section.

• But in the current version, print will not work
  

Technical details:

• Redash Version: 9.0.0-a;pha
• Browser/OS: default Docker
• How did you install Redash: Docker

[sudarshanbasumatary]

Exactly the same issue when self-hosting.

We fixed it by updating the CustomPrint class in Python query runner.
Created a pull request for the same: https://github.com/getredash/redash/pull/4730