What is the difference between __file__ and "source.py"

Question

In this code:
https://code.sololearn.com/cCyj9p4Ny07R/?ref=app
I find that __file__ & "source.py" have same data
But "__file__=='source.py' " returns False

Answer 1

__file__ is a string which refers to the file "source.py" from the disk as "C:\Compiler\....\source.py"

While "source.py" is a string which refers to the same file from the current folder.

You performed basic string comparison on strings "C:\Compiler\....\source.py" and "string.py", that's why False was returned.

Answer 2

https://code.sololearn.com/cTF75EKiTl9j/?ref=app