Tell if Python is in interactive mode
__main__.__file__ doesn't exist in the interactive interpreter:
import __main__ as mainprint hasattr(main, '__file__')This also goes for code run via python -c, but not python -m.
I compared all the methods I found and made a table of results. The best one seems to be this:
hasattr(sys, 'ps1')
If anyone has other scenarios that might differ, comment and I'll add it