The second idea is that Django unlikely uses stdin/stdout operations, but instead creates some intermediate objects. Maybe there is an option how to create such objects.

If the problem is your “print” statement - fight it there, in the “print” statement, not at the system/platform level.

Just remember that your terminal is a file-like object, you cann’t put unicode objects into it, only byte-encoded streams. If you happen to work with unicode objects, you have to encode it to byte stream before putting it into any file, socket or simply output somewhere outside your application. Python is not well suited for guessing required encoding, so it uses ASCII as default encoding - “when facing ambiguity, refuse to guess”. You have to know the required encoding before producing output.