How can I check to see if a Python script was started interactively?

I'd like for a script of mine to have 2 behaviours, one when started as a scheduled task, and another if started manually. How could I test for interactiveness?

EDIT: this could either be a cron job, or started by a windows batch file, through the scheduled tasks.

From stackoverflow

• If you want to know if you're reading from a terminal (not clear if that is enough of a distinction, please clarify) you can use

  sys.stdin.isatty()
  

• You should simply add a command-line switch in the scheduled task, and check for it in your script, modifying the behavior as appropriate. Explicit is better than implicit.

  One benefit to this design: you'll be able to test both behaviors, regardless of how you actually invoked the script.

  scvalex : Agreed. Run the script normally with awesomeApp and as a batch job with awesomeApp --batch.

• I'd just add a command line switch when you're calling it with cron:

  python yourscript.py -scheduled

  then in your program

  import sys
  
  if "-scheduled" in sys.argv:
      #--non-interactive code--
  else: 
      #--interactive code--
  

  Gregg Lind : at least use the conventional "--scheduled"