warnings

Silencing warnings in Pandas

Silencing warnings in Pandas Question: When running: mydf = pd.read_csv(p_file, sep=’,’, error_bad_lines=False, index_col=False) I get many lines like the following: … Skipping line 77432: expected 15 fields, saw 16 Skipping line 77497: expected 15 fields, saw 16 Skipping line 77528: expected 15 fields, saw 16 Skipping line 77560: expected 15 fields, saw 16 Skipping line …

Total answers: 1

How do I get warnings.warn to issue a warning and not ignore the line?

How do I get warnings.warn to issue a warning and not ignore the line? Question: I’m trying to raise a DeprecationWarning, with a code snippet based on the example shown in the docs. http://docs.python.org/2/library/warnings.html#warnings.warn Official def deprecation(message): warnings.warn(message, DeprecationWarning, stacklevel=2) Mine import warnings warnings.warn(“This is a warnings.”, DeprecationWarning, stacklevel=2) is None # returns True I’ve …

Total answers: 3

How to find out where a Python Warning is from

How to find out where a Python Warning is from Question: I’m still kinda new with Python, using Pandas, and I’ve got some issues debugging my Python script. I’ve got the following warning message : […]pandascoreindex.py:756: UnicodeWarning: Unicode equal comparison failed to convert both arguments to Unicode – interpreting them as being unequal return self._engine.get_loc(key) …

Total answers: 4

How do I catch a numpy warning like it's an exception (not just for testing)?

How do I catch a numpy warning like it's an exception (not just for testing)? Question: I have to make a Lagrange polynomial in Python for a project I’m doing. I’m doing a barycentric style one to avoid using an explicit for-loop as opposed to a Newton’s divided difference style one. The problem I have …

Total answers: 4

What's the difference between logging.warn and logging.warning in Python?

What's the difference between logging.warn and logging.warning in Python? Question: The samples at http://docs.python.org/2/howto/logging.html use both warn and warning. Asked By: Tallmad || Source Answers: Prior to Python 3.3, they are the same, however warn is deprecated: >>> import logging >>> logging.warn is logging.warning True Answered By: jamylak logging.warn has been deprecated since Python 3.3 …

Total answers: 2

Does python have a "use strict;" and "use warnings;" like in perl?

Does python have a "use strict;" and "use warnings;" like in perl? Question: I am learning perl and python… at the same time, not my by design but it has to be done. Question: In a perl script I use(see below) at the head of my txt. #!/usr/bin/env perl use strict; use warnings; Is there …

Total answers: 6

Python 3: Catching warnings during multiprocessing

Python 3: Catching warnings during multiprocessing Question: Too long; didn’t read The warnings.catch_warnings() context manager is not thread safe. How do I use it in a parallel processing environment? Background The code below solves a maximization problem using parallel processing with Python’s multiprocessing module. It takes a list of (immutable) widgets, partitions them up (see …

Total answers: 3

logging.info doesn't show up on console but warn and error do

logging.info doesn't show up on console but warn and error do Question: When I log an event with logging.info, it doesn’t appear in the Python terminal. import logging logging.info(‘I am info’) # no output In contrast, events logged with logging.warn do appear in the terminal. import logging logging.warn(‘I am warning’) # outputs “I am warning” …

Total answers: 9

Hide all warnings in ipython

Hide all warnings in IPython Question: I need to produce a screencast of an IPython session, and to avoid confusing viewers, I want to disable all warnings emitted by warnings.warn calls from different packages. Is there a way to configure the ipythonrc file to automatically disable all such warnings? Asked By: astrofrog || Source Answers: …

Total answers: 4

In Python, how does one catch warnings as if they were exceptions?

In Python, how does one catch warnings as if they were exceptions? Question: A third-party library (written in C) that I use in my python code is issuing warnings. I want to be able to use the try except syntax to properly handle these warnings. Is there a way to do this? Asked By: Boris …

Total answers: 8