DeprecationWarning in json/encoder.py

[durack1]

While using spyder 3.1.3 (jupyter_client: 5.0.1-py27_0; jupyter_core: 4.3.0-py27_0; ipython-5.3.0-py27_0; ipython_genutils-0.2.0-py27_0) I'm getting a DeprecationWarning when importing the vcs package:

In [2]: import warnings
   ...: warnings.filterwarnings('ignore', category=DeprecationWarning)
In [3]: import vcs
/home/user/anaconda2/envs/cdatcmornclnco/lib/python2.7/json/encoder.py:207: DeprecationWarning: Interpreting naive datetime as local 2017-04-12 19:45:31.251897. Please add timezone info to timestamps.
  chunks = self.iterencode(o, _one_shot=True)

Has anyone seen this issue before, and can suggest a way to solve this? It's making using iPython/jupyter effectively, incredibly challenging..

@doutriaux1
jupyter/help#157
spyder-ide/spyder#4196
CDAT/vcs#170
wireservice/agate#672
http://bugs.python.org/issue30063

[doutriaux1]

@durack1 I think this gave me the answer. We have the following line in vcs:
https://github.com/UV-CDAT/vcs/blob/master/vcs/Canvas.py#L65
If I comment it out warnings disappear, please try it on your side as well. In the mean time i will investigate as of why we put this in.

[doutriaux1]

@aashish24 a quick git blame shows you introduced this a while back (see CDAT/vcs@5f8524f). It worked after this i still think the warnings are triggered by our new doc strings (@embrown do you know what we did that could cause this). @aashish24 can you remember why this was in, will it break anything if I comment it out?

[doutriaux1]

@durack1 try to play with:

warnings.filterwarnings("default", "", DeprecationWarning, "", 0)

to fix your issue

[durack1]

It seems my usability issue was solved by commenting out a warnings call vcs/Canvas.py#L65

63
64 # Python < 3 DeprecationWarning ignored by default
65 #warnings.simplefilter('default')
66

This leads to an iPython/jupyter session now looking like:

Python 2.7.13 | packaged by conda-forge | (default, Mar 20 2017, 14:04:17)
Type "copyright", "credits" or "license" for more information.
IPython 5.3.0 -- An enhanced Interactive Python.
?         -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help      -> Python's own help system.
object?   -> Details about 'object', use 'object??' for extra details.
import vcs
In [2]:

Not sure this will solve the other issues highlighted above (jupyter/help#157, spyder-ide/spyder#4196, CDAT/vcs#170, wireservice/agate#672), but it's got me back to working

If no one else on the jupyter team has anything to add or enlighten with this issue feel free to close

[ivanov]

Hey there, I'm going through old issues and it seems to me that it makes sense to close this one.

Thanks everyone and happy hacking!