In a Python script, is there any way to tell if the interpreter is in interactive mode? This would be useful so that, for instance, when you run an interactive Python session and import a module, slightly different code is executed (for example, logging is turned off).
I’ve looked at tell whether python is in -i mode and tried the code there, however, that function only returns true if Python has been invoked with the -i flag and not when the command used to invoke interactive mode is
python with no arguments.
What I mean is something like this:
if __name__=="__main__": #do stuff elif __pythonIsInteractive__: #do other stuff else: exit()
__main__.__file__ doesn’t exist in the interactive interpreter:
import __main__ as main print hasattr(main, '__file__')
This also goes for code run via
python -c, but not
if sys.flags.interactive: #interactive else: #not interactive
From TFM: If no interface option is given, -i is implied, sys.argv is an empty string (“”) and the current directory will be added to the start of sys.path.
If the user invoked the interpreter with
python and no arguments, as you mentioned, you could test this with
if sys.argv == ''. This also returns true if started with
python -i, but according to the docs, they’re functionally the same.
I compared all the methods I found and made a table of results. The best one seems to be this:
If anyone has other scenarios that might differ, comment and I’ll add it
The following works both with and without the -i switch:
#!/usr/bin/python import sys # Set the interpreter bool try: if sys.ps1: interpreter = True except AttributeError: interpreter = False if sys.flags.interactive: interpreter = True # Use the interpreter bool if interpreter: print 'We are in the Interpreter' else: print 'We are running from the command line'
Here’s something that would work. Put the following code snippet in a file, and assign the path to that file to the
PYTHONSTARTUP environment variable.
__pythonIsInteractive__ = None
And then you can use
if __name__=="__main__": #do stuff elif '__pythonIsInteractive__' in globals(): #do other stuff else: exit()