Re: [ferret_users] PyFerret in Mac OSX Catalina

[Karl Smith - NOAA Affiliate <karl.smith@xxxxxxxx>]

Thanks to the message from Tony, and his checking my changes, there is a simple solution to this problem that also gets rid of the warning messages produced in earlier Mac OS X versions.

I will work on getting an update out in conda that includes this change, but for those comfortable "tweaking" Python scripts, the change is to add

try:

    import multiprocessing

    multiprocessing.set_start_method('spawn')

except:

    pass

somewhere near the beginning of $FER_DIR/lib/python3.7/site-packages/pyferret/__init__.py

This initialization of the multiprocessing package tells it to use "spawn" instead of "fork" to create new processes.

Best regards,

Karl

On Fri, Oct 11, 2019 at 7:17 PM Jian Ma <Jian.Ma@xxxxxxxxxxx> wrote:

Thanks. I think this is a problem once appear before.

I guess I will wait for you for a while until I have to work with ferret. If still not resolved, maybe I have to roll back the system with time machine. Hope that will not happen.

Thanks anyway,

Tony

**************************************
Jian Ma

T-T Associate Professor

Enlightening Young Scholar
School of Oceanography
Shanghai Jiao Tong University

1954 Huashan Road
Xuhui, Shanghai 200030, China
Tel: +86-131-2240-7690
E-mail: Jian.Ma@xxxxxxxxxxx
**************************************

On Oct 12, 2019, at 10:12 AM, Karl Smith - NOAA Affiliate <karl.smith@xxxxxxxx> wrote:

Yes, that is a problem that cannot be easily fixed.  I will have to think about what to do, but it is going to take awhile.

So at this point you can only use it with the -nodisplay command-line option, which means no displayed windows (does not use Qt).  To see a plot you would have to save the image to file with the FRAME command and then use something else to view the image file.  So not very friendly.

Best regards,

Karl

On Fri, Oct 11, 2019 at 6:35 PM Jian Ma <Jian.Ma@xxxxxxxxxxx> wrote:

Dear Karl,

This method does remove the errors before, but ended with a freeze…

yes? fill/n=1 hur[m=@ave,l=@ave,z=10000:100000@ave]

The process has forked and you cannot use this CoreFoundation functionality safely. You MUST exec().

Break on __THE_PROCESS_HAS_FORKED_AND_YOU_CANNOT_USE_THIS_COREFOUNDATION_FUNCTIONALITY___YOU_MUST_EXEC__() to debug.

:-(

Tony

**************************************
Jian Ma

T-T Associate Professor

Enlightening Young Scholar
School of Oceanography
Shanghai Jiao Tong University

1954 Huashan Road
Xuhui, Shanghai 200030, China
Tel: +86-131-2240-7690
E-mail: Jian.Ma@xxxxxxxxxxx
**************************************

On Oct 12, 2019, at 5:25 AM, Karl Smith - NOAA Affiliate <karl.smith@xxxxxxxx> wrote:

I now remember some update of conda removed the sip package.  I had updated my python code some time ago to remove the use of that package.  (It is no longer needed with python 3.)   But those updates in my code have yet to be pushed out to a conda release.

So, for the time being, please reinstall the sip package:

   $ conda install -n FERRET sip

(replace "FERRET" with name of the conda environment containing PyFerret)

My apologies that I did not see this earlier.  I hope this solves the problem.  From a web search, it appears there are still some issues with using Qt under Catalina; the question is whether my code manages to avoid those issues.

Best regards,

Karl

On Fri, Oct 11, 2019 at 12:00 AM Jian Ma <Jian.Ma@xxxxxxxxxxx> wrote:

Dear Karl,

It did not work. Pls see the screen output:

Last login: Fri Oct 11 14:20:16 on ttys000

(base) VectorSigma@Cybertron-3 ~ % conda activate FERRET 

(FERRET) VectorSigma@Cybertron-3 ~ % python3

Python 3.7.3 | packaged by conda-forge | (default, Jul  1 2019, 14:38:56) 

[Clang 4.0.1 (tags/RELEASE_401/final)] :: Anaconda, Inc. on darwin

Type "help", "copyright", "credits" or "license" for more information.

>>> import PyQt5

>>> exit()

(FERRET) VectorSigma@Cybertron-3 ~ % ferret

  NOAA/PMEL TMAP

  PyFerret v7.5 (optimized)

  Darwin 17.7.0 - 09/03/19

  11-Oct-19 14:52     

yes? set w 1

grdelWindowCreate: error when calling createWindow in pyferret.graphbind: The PQ viewers requires PyQt5 or PyQt4

FGD_GACWK: null windowobj

FGD_GSCR: null windowobj

FGD_GSCR: null windowobj

FGD_GSCR: null windowobj

FGD_GSCR: null windowobj

FGD_GSCR: null windowobj

FGD_GSCR: null windowobj

FGD_GSPLR: null windowobj

FGD_GSPLR: null windowobj

FGD_GSPLR: null windowobj

FGD_GSPLR: null windowobj

FGD_GSPLR: null windowobj

FGD_GSPLR: null windowobj

FGD_GSPLR: null windowobj

FGD_GSPLR: null windowobj

FGD_GSPLR: null windowobj

FGD_GSPLR: null windowobj

FGD_GSPLR: null windowobj

FGD_GSPLR: null windowobj

FGD_GSPLR: null windowobj

FGD_GSPLR: null windowobj

FGD_GSPLR: null windowobj

FGD_GSPLR: null windowobj

FGD_GSPLR: null windowobj

FGD_GSPLR: null windowobj

FGD_GQDSP: null windowobj

 **ERROR: value out of legal range: The implied size in pixels is too small

yes? 

Any idea?

Tony

Sent from my iPhone

On Oct 11, 2019, at 12:51 AM, Karl Smith - NOAA Affiliate <karl.smith@xxxxxxxx> wrote:



I have not tested at all with this brand-new version of Mac OS X.  Many third-party vendors (including Adobe) are recommending holding off on upgrading as their software does not yet work under Catalina.  So I am not surprised to hear there are problems with PyQt (probably Qt) and Catalina.

That being said, the message you show arises when both the "import PyQt5" and "import PyQt4" python commands fail.  I doubt it will help, but attempting to run these import commands might give more information about the problem.  So something like the following commands ("$" prompt are shell commands, ">>>" prompt are python commands, replace "FERRET" with whatever environment name you used for PyFerret):

    $ conda activate FERRET

    $ python3

    >>> import PyQt5

    >>> exit()

Kind regards,

Karl

On Thu, Oct 10, 2019 at 12:05 AM Jian (Tony) Ma <tonyj.ma@xxxxxxxxx> wrote:

Dear ferreters,

I upgraded my Mac and found I need to reinstall miniconda and pyferret. But after that, the figure window cannot be opened with the following message:

grdelWindowCreate: error when calling createWindow in pyferret.graphbind: The PQ viewers requires PyQt5 or PyQt4

I checked that pyqt5 is installed. Any solution for that?

Thanks,
Tony

Sent from my iPhone

--

Karl M. Smith, Ph.D.
JISAO Univ. Wash. and PMEL NOAA
"The contents of this message are mine personally and do
not necessarily reflect any position of the Government
or the National Oceanic and Atmospheric Administration."

--

Karl M. Smith, Ph.D.
JISAO Univ. Wash. and PMEL NOAA
"The contents of this message are mine personally and do
not necessarily reflect any position of the Government
or the National Oceanic and Atmospheric Administration."

--

Karl M. Smith, Ph.D.
JISAO Univ. Wash. and PMEL NOAA
"The contents of this message are mine personally and do
not necessarily reflect any position of the Government
or the National Oceanic and Atmospheric Administration."

--

Karl M. Smith, Ph.D.
JISAO Univ. Wash. and PMEL NOAA
"The contents of this message are mine personally and do
not necessarily reflect any position of the Government
or the National Oceanic and Atmospheric Administration."