How to get filename of the __main__ module in Python?

python python-module
Roman Starkov picture Roman Starkov · Mar 3, 2009 · Viewed 50.7k times · Source

Suppose I have two modules:

a.py:

import b
print __name__, __file__

b.py:

print __name__, __file__

I run the "a.py" file. This prints:

b        C:\path\to\code\b.py
__main__ C:\path\to\code\a.py

Question: how do I obtain the path to the __main__ module ("a.py" in this case) from within the "b.py" library?

Answer

ironfroggy picture ironfroggy · Mar 3, 2009 
import __main__
print __main__.__file__

Related questions

What does if __name__ == "__main__": do?

Given the following code, what does the if __name__ == "__main__": do? # Threading example import time, thread def myfunction(string, sleeptime, lock, *args): while True: lock.acquire() time.sleep(sleeptime) lock.release() time.sleep(sleeptime) if __name__ == "__main__": lock = thread.allocate_…

Read More
How to import other Python files?

How do I import other files in Python? How exactly can I import a specific python file like import file.py? How can I import a folder instead of a specific file? I want to load a Python file dynamically …

Read More
How to import a module given the full path?

How can I load a Python module given its full path? Note that the file can be anywhere in the filesystem, as it is a configuration option.

Read More