Finding location in code for numpy RuntimeWarning

Question

I am getting warnings like these when running numpy on reasonably large pipeline.

RuntimeWarning: invalid value encountered in true_divide

RuntimeWarning: invalid value encountered in greater

How do I find where they are occurring in the code besides writing dozens of print statements?

Python 2.7 and numpy 1.8.1

Warren Weckesser · Accepted Answer · 2023-07-25 12:34:49Z

25

One way is to convert the warnings to errors:

import warnings
warnings.simplefilter('error', RuntimeWarning)

Then the traceback will tell you where the error occurred.

Thanks to @Graham501617 for the following tip:

This can be done without code changes using the python cli:

python -Werror my_script.py

See the Python documentation for more information.

answered Feb 16, 2015 at 17:07

Warren Weckesser

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This can be done without code changes using the python cli: python -Werror my_script.py. docs.python.org/3/using/cmdline.html#cmdoption-W