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One-liner to show the caller of the current function. (Python recipe) by Oren Tirosh
ActiveState Code (http://code.activestate.com/recipes/578422/)

This is a quick one-liner to produce the filename and line number of the caller of the current function.

Python, 1 line
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'{0.f_code.co_filename}:{0.f_lineno}'.format(sys._getframe(1))

This is useful for debugging and logging. It also nicely demonstrates the attribute access feature of the .format() method format string. If you wrap it in a function change the argument to _getframe() to 2.

This line reproduces the format used by exception tracebacks:

'File "{0.f_code.co_filename}", line {0.f_lineno}, in {0.f_code.co_name}'.format(sys._getframe(1))
Tags: _getframe