__future__

Understanding Python's __future__ module

This is an easy language-knowledge question that tests familiarity with Python's standard library and how the language evolves. It appears in Python interview screens, particularly at firms that maintain large codebases or work across multiple Python versions.

The question probes whether you understand how Python introduces new language features while maintaining backward compatibility. Candidates should be able to explain the mechanism, recognise common use cases in real code, and understand why a program might import from this module at the top of a file.

• Language versioning and deprecation cycles
• Enabling experimental or future syntax in current Python versions
• How imports affect parser and runtime behaviour