How can I do an "if run from ipython" test in Python?

Question

To ease debugging from Ipython, I include the following in the beginning of my scripts

from IPython.Debugger import Tracer debug = Tracer() 

However, if I launch my script from the command line with

$ python myscript.py 

I get an error related to Ipython. Is there a way to do the following

if run_from_ipython():     from IPython.Debugger import Tracer     debug = Tracer() 

This way I only import the Tracer() function when I need it.

Answer 1

This is probably the kind of thing you are looking for:

def run_from_ipython():     try:         __IPYTHON__         return True     except NameError:         return False 

Answer 2

The Python way is to use exceptions. Like:

try:     from IPython.Debugger import Tracer     debug = Tracer() except ImportError:     pass # or set "debug" to something else or whatever