How to disable Python warnings? How to disable Python warnings? python python

How to disable Python warnings?

Look at the Temporarily Suppressing Warnings section of the Python docs:

If you are using code that you know will raise a warning, such as a deprecated function, but do not want to see the warning, then it is possible to suppress the warning using the catch_warnings context manager:

import warningsdef fxn():    warnings.warn("deprecated", DeprecationWarning)with warnings.catch_warnings():    warnings.simplefilter("ignore")    fxn()

I don't condone it, but you could just suppress all warnings with this:

import warningswarnings.filterwarnings("ignore")


>>> import warnings>>> def f():...     print('before')...     warnings.warn('you are warned!')...     print('after')...>>> f()before<stdin>:3: UserWarning: you are warned!after>>> warnings.filterwarnings("ignore")>>> f()beforeafter

There's the -W option.

python -W ignore

You can also define an environment variable (new feature in 2010 - i.e. python 2.7)

export PYTHONWARNINGS="ignore"

Test like this: Default

$ export PYTHONWARNINGS="default"$ python>>> import warnings>>> warnings.warn('my warning')__main__:1: UserWarning: my warning>>>

Ignore warnings

$ export PYTHONWARNINGS="ignore"$ python>>> import warnings>>> warnings.warn('my warning')>>> 

For deprecation warnings have a look at how-to-ignore-deprecation-warnings-in-python

Copied here...

From documentation of the warnings module:

 #!/usr/bin/env python -W ignore::DeprecationWarning

If you're on Windows: pass -W ignore::DeprecationWarning as an argument to Python. Better though to resolve the issue, by casting to int.

(Note that in Python 3.2, deprecation warnings are ignored by default.)


import warningswith warnings.catch_warnings():    warnings.filterwarnings("ignore", category=DeprecationWarning)    import md5, shayourcode()

Now you still get all the other DeprecationWarnings, but not the ones caused by:

import md5, sha