Question

I have a Python program that consists of several modules. The “main” module creates a file variable log_file for logging the output; all the other modules would need to write to that file as well.

However, I don’t want to import the “main” module into other modules, since it would be a really weird dependency (not to mention it might not even work due to circular dependency).

Where, then, should I store the log_file variable?

EDIT:

Following @pyfunc answer – would this be ok:

--- config.py ---
# does not mention log_file
# unless it's required for syntax reasons; in which case log_file = None
# ...

--- main.py ---
from datetime import datetime
import config.py
log_filename = str(datetime.now()) + '.txt'
config.log_file = open(log_filename, 'w')
# ...

--- another_module.py ---
import config.py
# ...
config.log_file.write(some_stuff)

Answer 1

One way is to take all that code into another module so that you could import it in main file and other modules as well.

Hope you have checked on : http://docs.python.org/library/logging.html