How to get the line number in python

lineno_demo.py

# coding: utf-8

# Originally from a tweet by Ned Batchelder @nedbat
import inspect
def __line__():
    """ Return the current line number. """
    return inspect.currentframe().f_back.f_lineno
    
if __name__ == "__main__":
    print(f"At {__line__()} of {__file__}")