Spyder: QSocketNotifier: Multiple socket notifiers for same socket and type Read

[pchristian4481]

Description

What steps will reproduce the problem?

url = 'https://raw.githubusercontent.com/jbrownlee/Datasets/master/wine.csv'
df = read_csv(url, header=None)

Versions

• Spyder version: 4.1.4
• Python version: 3.7.7
• Qt version: 5.9.6
• PyQt5 version: 5.9.2
• Operating System: Windows 10

Dependencies

# Mandatory:
atomicwrites >=1.2.0           :  1.4.0 (OK)
chardet >=2.0.0                :  3.0.4 (OK)
cloudpickle >=0.5.0            :  1.4.1 (OK)
diff_match_patch >=20181111    :  20181111 (OK)
intervaltree                   :  None (OK)
IPython >=4.0                  :  7.16.1 (OK)
jedi =0.17.1                   :  0.17.1 (OK)
nbconvert >=4.0                :  5.6.1 (OK)
numpydoc >=0.6.0               :  0.9.2 (OK)
paramiko >=2.4.0               :  2.7.1 (OK)
parso =0.7.0                   :  0.7.0 (OK)
pexpect >=4.4.0                :  4.8.0 (OK)
pickleshare >=0.4              :  0.7.5 (OK)
psutil >=5.3                   :  5.7.0 (OK)
pygments >=2.0                 :  2.6.1 (OK)
pylint >=1.0                   :  2.4.4 (OK)
pyls >=0.34.0;<1.0.0           :  0.34.1 (OK)
qdarkstyle >=2.8               :  2.8.1 (OK)
qtawesome >=0.5.7              :  0.7.0 (OK)
qtconsole >=4.6.0              :  4.7.5 (OK)
qtpy >=1.5.0                   :  1.9.0 (OK)
rtree >=0.8.3                  :  0.9.4 (OK)
sphinx >=0.6.6                 :  3.0.3 (OK)
spyder_kernels >=1.9.2;<1.10.0 :  1.9.2 (OK)
watchdog                       :  None (OK)
zmq >=17                       :  18.1.1 (OK)

# Optional:
cython >=0.21                  :  0.29.17 (OK)
matplotlib >=2.0.0             :  3.1.3 (OK)
numpy >=1.7                    :  1.18.1 (OK)
pandas >=0.13.1                :  1.0.5 (OK)
scipy >=0.17.0                 :  1.5.0 (OK)
sympy >=0.7.3                  :  None (OK)

[goanpeca]

Hi @pchristian4481, thanks for the report.

Where are you seeing these messages/errors? Could you paste the full traceback and provide some context?

Thanks!

[raphaelquast]

I've just installed Spyder 4.1.4 and now i've run into the same warning...

After some checking the quickest way to reproduce it on my side is the following:
... simply execute the following lines in a fresh console (e.g. select all + F9 )

 # try to import something that can NOT be found
import asdfasdf

def somefunction():
    pass

>>> Traceback (most recent call last):
>>> 
>>>   File "<ipython-input-1-d725d5305948>", line 1, in <module>
>>>     import asdfasdf
>>> 
>>> ModuleNotFoundError: No module named 'asdfasdf'
>>> 
>>> 
>>> QSocketNotifier: Multiple socket notifiers for same socket 1948 and type Read
>>> 

[raphaelquast]

ok... I've just realized that there's an even simpler way...
(e.g. it also popps up during normal operations)

start a new console, type 1 and hit enter

[goanpeca]

@impact27 @dalthviz can you reproduce this?

[impact27]

maybe related to https://github.com/vispy/vispy/issues/1787 @raphaelquast do you use vispy?

[raphaelquast]

no, vispy is definitely not part of the environment I'm currently using

by the way... the warning is cumulative... so after 5 minutes I end up having my console flooded with
the same message on and on again...

Can you think of a possible quick-fix? (e.g. can i somehow turn off those warnings?)
(I'd really like to keep using v4.1.4 since it fixes the code-cell issue on separate windows which I tend to use extensively...)

[impact27]

I would use https://python.readthedocs.io/en/latest/library/warnings.html#the-warnings-filter to raise the warning as errors. This would hopefully help us by showing where the warning is raised from.

[ccordoba12]

This is probably a bug that happens on Windows only. I'm taking a look at it right now.

[dalthviz]

Maybe this is related jupyter/qtconsole#332 but now some how the message is being printed in the actual console?

Edit: I was not able to reproduce this (installed spyder 4.1.4 with pip in a new env). As @impact27 said, maybe a way to check where this warning is being triggered could be setting the filtering warnings to error. Something like this should made the change:

import warnings
warnings.filterwarnings("error")

and then the stderr should be printed in the console (hopefully with more information).

[pchristian4481]

Thank you.

From: Carlos Cordoba [e-mail]
Sent: Wednesday, July 15, 2020 11:07 AM
To: spyder-ide/spyder [e-mail]
Cc: pchristian4481 [e-mail]; Mention <
[email protected]>
Subject: Re: [spyder-ide/spyder] QSocketNotifier: Multiple socket
notifiers for same socket 1960 and type Read (#13275)

This is probably a bug that happens on Windows only. I'm taking a look at
it right now.

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[ccordoba12]

I found this was an error in the ipykernel package and submitted ipython/ipykernel#525 to fix it.

@dalthviz, could you test that change locally and let us know if it fixes the problem on your side? Thanks!

[dalthviz]

@ccordoba12 I was not able to reproduce this in the first place so I'm unsure if checking on my side would have any confirmation effect

[ccordoba12]

I was not able to reproduce this in the first place

Sorry, I thought you were. The steps to do it are:

1. Run %gui qt
2. Enter continually 1 in the console (as shown above by @raphaelquast).

[dalthviz]

@ccordoba12 the fix works :+1:

[raphaelquast]

good news 👍 so the way to go is to revert back to v4.1.3 and wait for v4.1.5 ?

[roteiro]

@raphaelquast as a quick fix until the fix is delivered through the updates you can download the fixed file from here: https://github.com/ipython/ipykernel/blob/4a05435220c730605ab454001ac3ecc364299736/ipykernel/eventloops.py
and replace the current file eventloops.py under pathToAnacondaInstallation\envs\yourEnvironment\Lib\site-packagesipykernel
Backup the current file just in case.
That solved it for me.

[ccordoba12]

@raphaelquast, this is not a problem in Spyder but in one of our dependencies (ipykernel). I hope a new release with my fix will be out soon (we don't have control over that, sorry).

[raphaelquast]

@roteiro
... thanks for the suggestion, however I try to avoid manually changing files in the environment if not absolutely necessary
(and in this case v4.1.3 does it's job well enough 😊)

@ccordoba12
OK, thanks for your (always) awesome support, I'll be patient!

[NaderNazemi]

Can't wait for a fix - thank you very much everyone :)

[pchristian4481]

@raphaelquast, nice fix. Thank you.

[raphaelquast]

@pchristian4481 thanks, but the credit should really go to @ccordoba12 and the rest since I haven't done a thing except complaining about the issue 😁

[pchristian4481]

Very good.

From: Raphael Quast [e-mail]
Sent: Monday, August 3, 2020 10:18 AM
To: spyder-ide/spyder [e-mail]
Cc: pchristian4481 [e-mail]; Mention <
[email protected]>
Subject: Re: [spyder-ide/spyder] QSocketNotifier: Multiple socket
notifiers for same socket and type Read (#13275)

@pchristian4481 https://github.com/pchristian4481 thanks, but the credit
should really go to @ccordoba12 https://github.com/ccordoba12 and the
rest since I haven't done a thing except complaining about the issue 😁

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distribution of such confidential information is strictly prohibited
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[raedbsili1991]

Hello,

I am receiving the same flooding warning in Spyder 4.1.5 .
And I sometimes receive 5 messages at the same time.
Shall I downgrade to 4.1.3 ?

[ccordoba12]

Please update the ipykernel package to its 5.3.4 version to get the fix for this issue.