### Navigation

- index
- modules |
- next |
- previous |
- Python »
- 3.3.4 Documentation »
- The Python Standard Library »
- 28. Python Runtime Services »

# 28.4. `__main__` — Top-level script environment

This module represents the (otherwise anonymous) scope in which the interpreter’s main program executes — commands read either from standard input, from a script file, or from an interactive prompt. It is this environment in which the idiomatic “conditional script” stanza causes a script to run:

    if __name__ == "__main__":
        main()

### Navigation

- index
- modules |
- next |
- previous |
- Python »
- 3.3.4 Documentation »
- The Python Standard Library »
- 28. Python Runtime Services »