Source line number for log purpose (newbie)

[T. C. Mits]

In c there was a way to get the current source line number via a macro,
__LINE__.

I need to be able to do the same thing.  I created a logger class that uses
a level setting.  At high levels I want to
log the source line number where the inline log.prtl( level, msg) method
call appears.

I'm sure this is easy but am getting lost digging through the Python source
and docs.

Thanks.....