From andy at voelkel.us  Thu Feb  6 20:41:32 2020
From: andy at voelkel.us (jandyman)
Date: Thu, 6 Feb 2020 18:41:32 -0700 (MST)
Subject: [Matplotlib-users] Can't get interactive plots working on OSX
 (Catalina)
Message-ID: <1581039692375-0.post@n5.nabble.com>

Hi,

I've spent several hours trying to figure out how to get interactive plots
to work on MacOS Catalina (plots which don't block program execution). I got
fairly excited when I found instructions in the Matplotlib docs for using
python as a framework and then using the macosx backend, but it doesn't seem
to help. I'm operating in debug mode from Visual Studio Code, which
otherwise seems to work well. Here's the code:

import matplotlib.pyplot as plt
import matplotlib
import numpy as np

matplotlib.use("macosx")
plt.ion()
x = np.linspace(0, 20, 100)  # Create a list of evenly-spaced numbers over
the range
plt.plot(x, np.sin(x))       # Plot the sine of each x point
plt.show() 
# put a breakpoint on this next line 
y = 5

If I omit the call to plt.ion(), I get a plot that blocks program execution
until I close the plot window, so I don't hit the breakpoint until the plot
is gone. If I leave the call to plot.ion() in, I hit the breakpoint, but no
plot is shown.

Does anyone know if is possible to get this to work, and if so, how? I've
got this sort of thing to work before with Spyder, but it is hinky, and I've
got other issues with Spyder. I'm just chasing the sort of user experience I
used to have with Matlab, only with Python, which I like better as a
language.

A lot of folks seems to use Jupyter for this sort of thing, and Jupyter is
great for what it does, but it isn't what I'm trying to do.



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From tcaswell at gmail.com  Fri Feb  7 11:31:55 2020
From: tcaswell at gmail.com (Thomas Caswell)
Date: Fri, 7 Feb 2020 11:31:55 -0500
Subject: [Matplotlib-users] Can't get interactive plots working on OSX
 (Catalina)
In-Reply-To: <1581039692375-0.post@n5.nabble.com>
References: <1581039692375-0.post@n5.nabble.com>
Message-ID: <CAA48SF95s+TZEK-XtAgYQ+NbgBMgzbu5XwZdiwNHf08Wmcm5EQ@mail.gmail.com>

Jandyman,

 The short answer: something has to run the GUI event loop while the prompt
is waiting for user input.  This is typically called an "input hook".

For a long answer see https://github.com/matplotlib/matplotlib/pull/4779 .

Unfortunately I am not familiar enough with vscode's debug mode to provide
any guidance on how to configure it in that context.

Tom

On Thu, Feb 6, 2020 at 8:41 PM jandyman <andy at voelkel.us> wrote:

> Hi,
>
> I've spent several hours trying to figure out how to get interactive plots
> to work on MacOS Catalina (plots which don't block program execution). I
> got
> fairly excited when I found instructions in the Matplotlib docs for using
> python as a framework and then using the macosx backend, but it doesn't
> seem
> to help. I'm operating in debug mode from Visual Studio Code, which
> otherwise seems to work well. Here's the code:
>
> import matplotlib.pyplot as plt
> import matplotlib
> import numpy as np
>
> matplotlib.use("macosx")
> plt.ion()
> x = np.linspace(0, 20, 100)  # Create a list of evenly-spaced numbers over
> the range
> plt.plot(x, np.sin(x))       # Plot the sine of each x point
> plt.show()
> # put a breakpoint on this next line
> y = 5
>
> If I omit the call to plt.ion(), I get a plot that blocks program execution
> until I close the plot window, so I don't hit the breakpoint until the plot
> is gone. If I leave the call to plot.ion() in, I hit the breakpoint, but no
> plot is shown.
>
> Does anyone know if is possible to get this to work, and if so, how? I've
> got this sort of thing to work before with Spyder, but it is hinky, and
> I've
> got other issues with Spyder. I'm just chasing the sort of user experience
> I
> used to have with Matlab, only with Python, which I like better as a
> language.
>
> A lot of folks seems to use Jupyter for this sort of thing, and Jupyter is
> great for what it does, but it isn't what I'm trying to do.
>
>
>
> --
> Sent from:
> http://matplotlib.1069221.n5.nabble.com/matplotlib-users-f3.html
> _______________________________________________
> Matplotlib-users mailing list
> Matplotlib-users at python.org
> https://mail.python.org/mailman/listinfo/matplotlib-users
>


-- 
Thomas Caswell
tcaswell at gmail.com
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From andy at voelkel.us  Fri Feb  7 12:09:14 2020
From: andy at voelkel.us (jandyman)
Date: Fri, 7 Feb 2020 10:09:14 -0700 (MST)
Subject: [Matplotlib-users] Can't get interactive plots working on OSX
 (Catalina)
In-Reply-To: <CAA48SF95s+TZEK-XtAgYQ+NbgBMgzbu5XwZdiwNHf08Wmcm5EQ@mail.gmail.com>
References: <1581039692375-0.post@n5.nabble.com>
 <CAA48SF95s+TZEK-XtAgYQ+NbgBMgzbu5XwZdiwNHf08Wmcm5EQ@mail.gmail.com>
Message-ID: <1581095354140-0.post@n5.nabble.com>

Yes, I'm aware of the event loop issue. I thought that was the point of
installing python "as a framework" and then using the macosx backend. I
guess not. The description in the matplotlib docs was misleading.

But thanks, I'll see if I can find a vs-code forum to ask this question.



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From pmhobson at gmail.com  Fri Feb  7 12:19:36 2020
From: pmhobson at gmail.com (Paul Hobson)
Date: Fri, 7 Feb 2020 09:19:36 -0800
Subject: [Matplotlib-users] Can't get interactive plots working on OSX
 (Catalina)
In-Reply-To: <1581095354140-0.post@n5.nabble.com>
References: <1581039692375-0.post@n5.nabble.com>
 <CAA48SF95s+TZEK-XtAgYQ+NbgBMgzbu5XwZdiwNHf08Wmcm5EQ@mail.gmail.com>
 <1581095354140-0.post@n5.nabble.com>
Message-ID: <CADT3MEDFJx_L70VbFhXqS=3ikwuW_JgBWttsb5RyHN_+c_ndUA@mail.gmail.com>

Hey Andy,

Could you point us to where you feel the docs were misleading?
Documentation is a difficult, on-going task. So specific and concrete
feedback goes a long way towards keeping it useful.
-p

On Fri, Feb 7, 2020 at 9:09 AM jandyman <andy at voelkel.us> wrote:

> Yes, I'm aware of the event loop issue. I thought that was the point of
> installing python "as a framework" and then using the macosx backend. I
> guess not. The description in the matplotlib docs was misleading.
>
> But thanks, I'll see if I can find a vs-code forum to ask this question.
>
>
>
> --
> Sent from:
> http://matplotlib.1069221.n5.nabble.com/matplotlib-users-f3.html
> _______________________________________________
> Matplotlib-users mailing list
> Matplotlib-users at python.org
> https://mail.python.org/mailman/listinfo/matplotlib-users
>
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From andy at voelkel.us  Fri Feb  7 12:43:55 2020
From: andy at voelkel.us (jandyman)
Date: Fri, 7 Feb 2020 10:43:55 -0700 (MST)
Subject: [Matplotlib-users] Can't get interactive plots working on OSX
 (Catalina)
In-Reply-To: <CADT3MEDFJx_L70VbFhXqS=3ikwuW_JgBWttsb5RyHN_+c_ndUA@mail.gmail.com>
References: <1581039692375-0.post@n5.nabble.com>
 <CAA48SF95s+TZEK-XtAgYQ+NbgBMgzbu5XwZdiwNHf08Wmcm5EQ@mail.gmail.com>
 <1581095354140-0.post@n5.nabble.com>
 <CADT3MEDFJx_L70VbFhXqS=3ikwuW_JgBWttsb5RyHN_+c_ndUA@mail.gmail.com>
Message-ID: <1581097435491-0.post@n5.nabble.com>

At this link:  https://matplotlib.org/faq/usage_faq.html#what-is-a-backend

Under the section talking about what an interactive plot is, I see this:

"Assuming you are running version 1.0.1 or higher, and you have an
interactive backend installed and selected by default, you should see a
plot, and your terminal prompt should also be active; you can type
additional commands such as:"

That sounds like exactly what I want. 

Then, at this link: https://matplotlib.org/3.1.0/faq/osx_framework.html

There is a description of using macosx as a framework. So I thought I'd be
good to go.

As a general comment, I didn't really see a good description on the GUI main
loop issue and how various systems deal with it. That would be really handy
to understand when trying to troubleshoot this sort of thing



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From tcaswell at gmail.com  Fri Feb  7 13:08:27 2020
From: tcaswell at gmail.com (Thomas Caswell)
Date: Fri, 7 Feb 2020 13:08:27 -0500
Subject: [Matplotlib-users] Can't get interactive plots working on OSX
 (Catalina)
In-Reply-To: <1581097435491-0.post@n5.nabble.com>
References: <1581039692375-0.post@n5.nabble.com>
 <CAA48SF95s+TZEK-XtAgYQ+NbgBMgzbu5XwZdiwNHf08Wmcm5EQ@mail.gmail.com>
 <1581095354140-0.post@n5.nabble.com>
 <CADT3MEDFJx_L70VbFhXqS=3ikwuW_JgBWttsb5RyHN_+c_ndUA@mail.gmail.com>
 <1581097435491-0.post@n5.nabble.com>
Message-ID: <CAA48SF_GWUJnby98O7OoK1VfLKk2KFCky4dLii__phRbXHcu9A@mail.gmail.com>

That section assumes the prompt is either the plain python or IPython
shell, both of which have machinery to hook up the input_hook below
Matplotlib (which is required to have the figure to "be alive") and we
install hooks to trigger re-draws when needed.

In your case you are inside of an input loop in the debugger.  For the
figure to be live in that context something would need to be registered on
the vscode side for the input hook.

It is my understanding that "framework build" in this context refers to how
the linking to the system libraries is done.

Tom

On Fri, Feb 7, 2020 at 12:44 PM jandyman <andy at voelkel.us> wrote:

> At this link:  https://matplotlib.org/faq/usage_faq.html#what-is-a-backend
>
> Under the section talking about what an interactive plot is, I see this:
>
> "Assuming you are running version 1.0.1 or higher, and you have an
> interactive backend installed and selected by default, you should see a
> plot, and your terminal prompt should also be active; you can type
> additional commands such as:"
>
> That sounds like exactly what I want.
>
> Then, at this link: https://matplotlib.org/3.1.0/faq/osx_framework.html
>
> There is a description of using macosx as a framework. So I thought I'd be
> good to go.
>
> As a general comment, I didn't really see a good description on the GUI
> main
> loop issue and how various systems deal with it. That would be really handy
> to understand when trying to troubleshoot this sort of thing
>
>
>
> --
> Sent from:
> http://matplotlib.1069221.n5.nabble.com/matplotlib-users-f3.html
> _______________________________________________
> Matplotlib-users mailing list
> Matplotlib-users at python.org
> https://mail.python.org/mailman/listinfo/matplotlib-users
>


-- 
Thomas Caswell
tcaswell at gmail.com
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From andy at voelkel.us  Fri Feb  7 15:34:47 2020
From: andy at voelkel.us (jandyman)
Date: Fri, 7 Feb 2020 13:34:47 -0700 (MST)
Subject: [Matplotlib-users] Can't get interactive plots working on OSX
 (Catalina)
In-Reply-To: <CAA48SF_GWUJnby98O7OoK1VfLKk2KFCky4dLii__phRbXHcu9A@mail.gmail.com>
References: <1581039692375-0.post@n5.nabble.com>
 <CAA48SF95s+TZEK-XtAgYQ+NbgBMgzbu5XwZdiwNHf08Wmcm5EQ@mail.gmail.com>
 <1581095354140-0.post@n5.nabble.com>
 <CADT3MEDFJx_L70VbFhXqS=3ikwuW_JgBWttsb5RyHN_+c_ndUA@mail.gmail.com>
 <1581097435491-0.post@n5.nabble.com>
 <CAA48SF_GWUJnby98O7OoK1VfLKk2KFCky4dLii__phRbXHcu9A@mail.gmail.com>
Message-ID: <1581107687615-0.post@n5.nabble.com>

That is super handy information. It would be great if even those sentences
were included in the docs at the first link I sent:

https://matplotlib.org/faq/usage_faq.html#what-is-a-backend




--
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From petercohen8877 at gmail.com  Sat Feb  8 16:13:52 2020
From: petercohen8877 at gmail.com (new_matplotlib_user)
Date: Sat, 8 Feb 2020 14:13:52 -0700 (MST)
Subject: [Matplotlib-users] Called with incorrect property value and Text
 input context does not respond to _valueForTIProperty message
Message-ID: <1581196432325-0.post@n5.nabble.com>

Hi, I am new to matplotlib. I installed Anacronda Navigator 1.9.7 on a Mac
running Catalina 10.15.3

On a xterm, I went ipython and typed:

[python]
%matplotlib
import matplotlib.pyplot as pat
import numpy as np
fig = plt.figure()
[/python]

Whenever I click on the figure window or some other windows on my desktop, I
got the following messages.
Could you please let me know how to get rid of them? Thanks


In [32]: 2020-02-08 16:12:10.308 python[1036:20026]
imkxpc_getApplicationProperty:reply: called with incorrect property value 4,
bailing.
2020-02-08 16:12:10.308 python[1036:20026] Text input context does not
respond to _valueForTIProperty:
2020-02-08 16:12:10.309 python[1036:20026]
imkxpc_getApplicationProperty:reply: called with incorrect property value 4,
bailing.
2020-02-08 16:12:10.309 python[1036:20026] Text input context does not
respond to _valueForTIProperty:
2020-02-08 16:12:10.309 python[1036:20026]
imkxpc_getApplicationProperty:reply: called with incorrect property value 4,
bailing.
2020-02-08 16:12:10.309 python[1036:20026] Text input context does not
respond to _valueForTIProperty:
2020-02-08 16:12:10.309 python[1036:20026]
imkxpc_getApplicationProperty:reply: called with incorrect property value 4,
bailing.
2020-02-08 16:12:10.309 python[1036:20026] Text input context does not
respond to _valueForTIProperty:




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From selasley at icloud.com  Sat Feb  8 17:18:42 2020
From: selasley at icloud.com (Scott Lasley)
Date: Sat, 8 Feb 2020 17:18:42 -0500
Subject: [Matplotlib-users] Called with incorrect property value and
 Text input context does not respond to _valueForTIProperty message
In-Reply-To: <1581196432325-0.post@n5.nabble.com>
References: <1581196432325-0.post@n5.nabble.com>
Message-ID: <FF1EE416-7D63-4D07-B4AB-84707258D7B5@icloud.com>

I ran Anaconda Navigator 1.9.7 under macOS 10.15.3 and I don't see the same behavior.  I set up a snowflakes environment with python 3.7 as described in the Navigator getting started docs
https://docs.anaconda.com/anaconda/navigator/getting-started/
then installed matplotlib and ipython and ran the commands you listed after clicking on the arrow next to the environment name and selecting Open Terminal

$ python --version
Python 3.7.6
$ ipython3        
Python 3.7.6 (default, Jan  8 2020, 13:42:34) 
Type 'copyright', 'credits' or 'license' for more information
IPython 7.12.0 -- An enhanced Interactive Python. Type '?' for help.

In [1]: %matplotlib                                                                                                                                                                                    
Using matplotlib backend: MacOSX

In [2]: import matplotlib.pyplot as plt                                                                                                                                                                 

In [3]: import numpy                                                                                                                                                                                   

In [4]: plt.figure()                                                                                                                                                                                   
Out[4]: <Figure size 1280x960 with 0 Axes>

Clicking in the plot window or any other window does not produce the messages you are seeing.

When I created the snowflakes environment the default python version selected was 2.7.  Make sure you are using python 3.6 or higher in your environment - https://matplotlib.org/users/installing.html#dependencies

Hth,
Scott

> On Feb 8, 2020, at 4:13 PM, new_matplotlib_user <petercohen8877 at gmail.com> wrote:
> 
> Hi, I am new to matplotlib. I installed Anacronda Navigator 1.9.7 on a Mac
> running Catalina 10.15.3
> 
> On a xterm, I went ipython and typed:
> 
> [python]
> %matplotlib
> import matplotlib.pyplot as pat
> import numpy as np
> fig = plt.figure()
> [/python]
> 
> Whenever I click on the figure window or some other windows on my desktop, I
> got the following messages.
> Could you please let me know how to get rid of them? Thanks
> 
> 
> In [32]: 2020-02-08 16:12:10.308 python[1036:20026]
> imkxpc_getApplicationProperty:reply: called with incorrect property value 4,
> bailing.
> 2020-02-08 16:12:10.308 python[1036:20026] Text input context does not
> respond to _valueForTIProperty:
> 2020-02-08 16:12:10.309 python[1036:20026]
> imkxpc_getApplicationProperty:reply: called with incorrect property value 4,
> bailing.
> 2020-02-08 16:12:10.309 python[1036:20026] Text input context does not
> respond to _valueForTIProperty:
> 2020-02-08 16:12:10.309 python[1036:20026]
> imkxpc_getApplicationProperty:reply: called with incorrect property value 4,
> bailing.
> 2020-02-08 16:12:10.309 python[1036:20026] Text input context does not
> respond to _valueForTIProperty:
> 2020-02-08 16:12:10.309 python[1036:20026]
> imkxpc_getApplicationProperty:reply: called with incorrect property value 4,
> bailing.
> 2020-02-08 16:12:10.309 python[1036:20026] Text input context does not
> respond to _valueForTIProperty:
> 
> 
> 
> 
> --
> Sent from: http://matplotlib.1069221.n5.nabble.com/matplotlib-users-f3.html
> _______________________________________________
> Matplotlib-users mailing list
> Matplotlib-users at python.org
> https://mail.python.org/mailman/listinfo/matplotlib-users


From petercohen8877 at gmail.com  Sat Feb  8 23:10:19 2020
From: petercohen8877 at gmail.com (new_matplotlib_user)
Date: Sat, 8 Feb 2020 21:10:19 -0700 (MST)
Subject: [Matplotlib-users] Called with incorrect property value and
 Text input context does not respond to _valueForTIProperty message
In-Reply-To: <1581196432325-0.post@n5.nabble.com>
References: <1581196432325-0.post@n5.nabble.com>
Message-ID: <1581221419402-0.post@n5.nabble.com>

Hi Scott, I checked the python and ipython versions. They they are same as
yours.

When I typed plt.figure(), a figure window showed up in front of my xterm
window. When I moved the cursor to title of the figure window, those
messages showed up. Clicking the title of the xterm window also caused those
messages to show up.



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From newville at cars.uchicago.edu  Sun Feb  9 11:55:38 2020
From: newville at cars.uchicago.edu (Matt Newville)
Date: Sun, 9 Feb 2020 10:55:38 -0600
Subject: [Matplotlib-users] Can't get interactive plots working on OSX
 (Catalina)
In-Reply-To: <1581039692375-0.post@n5.nabble.com>
References: <1581039692375-0.post@n5.nabble.com>
Message-ID: <CA+7ESbo5WHce382Q+KUqwjBXJZEetBkS2yKks-M62Y+nmdigyg@mail.gmail.com>

Hi Jandyman,


On Thu, Feb 6, 2020 at 7:41 PM jandyman <andy at voelkel.us> wrote:

> Hi,
>
> I've spent several hours trying to figure out how to get interactive plots
> to work on MacOS Catalina (plots which don't block program execution). I
> got
> fairly excited when I found instructions in the Matplotlib docs for using
> python as a framework and then using the macosx backend, but it doesn't
> seem
> to help.


I also find the 'macosx' backend to be challenging for interactive work.
 It seems you have to keep hitting return in the main python REPL  for the
'macosx' event loop to process.  The other backends do not need this. In
particular, the 'qt5agg' and 'tkagg' backends will do what (I think) you
are looking for:  `pyplot.ion()` will make `pyplot.plot()` draw to the
screen immediately with a responsive plot window and not block the REPL.
 The 'wxagg' backend should be able to do this, but it appears that
`pyplot.ion()` does not actually work as it does for 'qt5agg' and 'tkagg'
-  I don't know why that it is.

You might find `wxmplot` (https://newville.github.io/wxmplot/ -- I am the
author of this) useful for interactive work from the Python REPL (or from
IPython for that matter).  With this, you would do something like:

    >>> import numpy as np
    >>> from wxmplot.interactive import plot
    >>> x = np.linspace(0, 20, 100)
    >>> pd = plot(x, np.sin(x))

This will immediately bring up a separate plot window and returning control
to the REPL.  The window is highly interactive: you can zoom in, save
images, and alter nearly every aspect of the plot (colors, themes,
linewidths, styles, markers, text labels, margins, legend display, log
scales, etc) from a configuration panel.  You can also easily plot to
multiple window frames, say with

    >>> pd2 = plot(x, np.cos(x), win=2)

Of course, not every aspect of matplotlib is exposed in `wxmplot`. The
return value from `plot` has a `panel.axes` attribute that is the
`matplotlib.axes`, which can be used for more complicated plot components.

There is also a `wxmplot.interactive.imshow` for showing false-color images
from 2-d arrays that also has many interactive options (color tables,
contrast, smoothing, etc).  `wxmplot` can be installed with `pip install
wxmplot`.

There is a nasty problem with Anaconda Python on MacOS that `python` is not
a framework build and so the wxPython module cannot draw to the screen, and
trying to do so exits python.  Instead, one needs to use `pythonw` (from
the `python.app` conda package) to use wxPython with Anaconda Python on
MacOS.   I do not know why this is.  This is merely irritating for running
scripts or applications, but is particularly problematic when using IDEs
such as Spyder or Idle, as they embed a Python interpreter that has been
launched with `python`, not `pythonw`.   For me, VSCode works fine as it
uses python from Python.org which does not have this problem.

Hope that helps,

--Matt Newville
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From apuroopa.rao1 at gmail.com  Thu Feb 20 02:42:14 2020
From: apuroopa.rao1 at gmail.com (apu)
Date: Thu, 20 Feb 2020 07:42:14 -0000
Subject: [Matplotlib-users] Connect plot in Contourf when there are missing
 values(nan)
Message-ID: <1582184535596-0.post@n5.nabble.com>

I am plotting x, y, z values using contourf plots. However I have some
missing z values (nan). All these regions are shown as blanks and the graph
looks diconnected.

Is there a way for the plot to have connected gaps? Plotly has an option to
connect gaps with smooth transitions?
https://plot.ly/python/contour-plots/#connect-the-gaps-between-none-values-in-the-z-matrix

Do we have an equivalent of this in matlotlib contourf plots?



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