matplotlib-users Mailing List for matplotlib

import pylab
causes it to try to import numpy
but 'numpy' is not found in numarray or numeric packages!?!
Any ideas?
Chris

Hello,
This is a test message - if you have received this message you may
delete it.
Thank you,
Craig Saffell
NOC Engineer Tier 2

>>>>> "Darren" == Darren Dale <dd...@co...> writes:
 Darren> Any objections to making the backend rc setting
 Darren> case-insensitive?
I think it is a good idea -- just put a .lower() in the relevant
places.
DH

On Wednesday 08 March 2006 15:55, Mitchell, Gary (Gary) wrote:
> John,
> Typo got me TkAgg not TKAgg works. The plot worked as shown below. 
> Thanks for your help I have run the example on page 7 of the
> users_guide_0.83.2.pdf and it looks great!!! Thanks again...
> Gary
Any objections to making the backend rc setting case-insensitive?

Hi,
On Wed, 8 Mar 2006, Mitchell, Gary (Gary) wrote:
> John,
> Typo got me TkAgg not TKAgg works.
Getting the capitalization of the backend wrong happens to me quite
often - would it be (easily?) possible to check for allowed
backends and raise a warning if necessary?
Best, Arnd

John Hunter wrote:
> Perhaps you entered it in wrong -- it should be "TkAgg" as you typed
> above but if you got this error I'm guessing you made a typo in your
> rc file.
You can also put a matplotlib.use("TkAgg") in your script which might be 
an easier way to test different back-ends than editing the rc file:
import matplotlib
matplotlib.use("TkAgg")
from pylab import subplot, show
ax = subplot(111)
ax.plot([1,2,3])
show()
-- 
Christopher Barker, Ph.D.
Oceanographer
 		
NOAA/OR&R/HAZMAT (206) 526-6959 voice
7600 Sand Point Way NE (206) 526-6329 fax
Seattle, WA 98115 (206) 526-6317 main reception
Chr...@no...

John,
Typo got me TkAgg not TKAgg works. The plot worked as shown below. =
Thanks for your help I have run the example on page 7 of the =
users_guide_0.83.2.pdf and it looks great!!!
Thanks again...
Gary
=20
________________________________
From: John Hunter [mailto:jdh...@ni...]
Sent: Wed 3/8/2006 1:43 PM
To: Mitchell, Gary (Gary)
Cc: mat...@li...
Subject: Re: [Matplotlib-users] update to: I can not get matplotlib to =
work on a windows xp professional machine
>>>>> "Mitchell," =3D=3D Mitchell, Gary (Gary) <gm...@ag...> writes:
 Gary> John, I tried using TkAgg as the backend and it raised
 Gary> a value error Unrecognized backend error. The
Perhaps you entered it in wrong -- it should be "TkAgg" as you typed
above but if you got this error I'm guessing you made a typo in your
rc file. Create a simple script
from pylab import subplot, show
ax =3D subplot(111)
ax.plot([1,2,3])
show()
and run it from the command line with
 > python myscript.py --verbose-helpful
This will report information about which backend you've selected
etc... It will also tell you which rc file is loaded. If you
encounter further errors please post this output along with your
explanation.
Sorry for the troubles -- you're almost there!
JDH

On Wednesday 08 March 2006 13:10, Eric Firing wrote:
> John,
>
> John Hunter wrote:
> >>>>>>"Darren" == Darren Dale <dd...@co...> writes:
> >
> > Darren> Thank you for the suggestion. How is it compatible with
> > Darren> Python-2.3? Do you mean we would include the source for
> > Darren> that module in mpl?
> >
> > Yep, just as we include pyparsing, et al.
> >
> > JDH
>
> What about Python-2.2? Do we still need to stay compatible with that?
> I would be happy to see that go, and officially move the requirement up
> to 2.3, if this has not already been done.
I have posted subprocess.py at 
http://staff.chess.cornell.edu/~dale/matplotlib/subprocess.py
running python subprocess.py will execute a test, which I tried with python 
2.2 and 2.3 on linux. They both seemed to work. A successful test includes 
failing to open a bogus file and therefore raising an exception as the last 
step. Would anyone running python-2.3 or 2.2 on windows or mac run this test 
and report the result?
Thanks,
Darren

John,
For some reason I seem to not be able to send email to the list..
Gary
Your message did not reach some or all of the intended recipients.=20
Subject:	 FW: [Matplotlib-users] update to: I can not get matplotlib to =
work on a windows xp professional machine=09
Sent:	 3/8/2006 12:59 PM=09
The following recipient(s) could not be reached:=20
 mat...@li... on 3/8/2006 1:04 PM
 There was a SMTP communication problem with the recipient's email =
server. Please contact your system administrator.
 < -a #5.5.0 SMTP; 550 Don't like your HELO/EHLO. Hostname must contain =
a dot.>=20
________________________________
From: John Hunter [mailto:jdh...@ni...]
Sent: Wed 3/8/2006 1:19 PM
To: Mitchell, Gary (Gary)
Cc: mat...@li...
Subject: Re: [Matplotlib-users] update to: I can not get matplotlib to =
work on a windows xp professional machine
 Gary> John, Thanks for your help! I edited the path and the
 Gary> dlls are found ok. I still get the message: It still
 Gary> gets an error stating the procedure entry point
 Gary> g_assert_warning could not be located in the dynamic
 Gary> link library libglib-2.0-0.dll. After I click ok on the
 Gary> error message the last line of the dump is displayed
 Gary> before it returns to the command line. Any ideas?
 Gary> Regards Gary
You might want to grab "Dependency Walker" and load the gobject.dll
file that is failing. It will tell you what it is trying to link to
and why it is failing. Did you add the bin and lib subdirs of the GTK
install tree to your PATH? If there are spaces in the install path,
it can be tricky to get right on win32.
Also, please keep replies on list since it will be archived for future
reference.
JDH

>>>>> "Mitchell," == Mitchell, Gary (Gary) <gm...@ag...> writes:
 Gary> John, I tried using TkAgg as the backend and it raised
 Gary> a value error Unrecognized backend error. The
Perhaps you entered it in wrong -- it should be "TkAgg" as you typed
above but if you got this error I'm guessing you made a typo in your
rc file. Create a simple script
from pylab import subplot, show
ax = subplot(111)
ax.plot([1,2,3])
show()
and run it from the command line with 
 > python myscript.py --verbose-helpful
This will report information about which backend you've selected
etc... It will also tell you which rc file is loaded. If you
encounter further errors please post this output along with your
explanation.
Sorry for the troubles -- you're almost there!
JDH

John,
I tried using TkAgg as the backend and it raised a value error =
Unrecognized backend error. The backends.html says The windows =
installer comes with TkAgg prebuilt so why do I get the error above? I =
selected PS as the backend and it took that ok. I did add both the =
GTK\bin and the GTK\lib to the sytem path. I will try the dependency =
walker when I can. I guess I am generating more questions...
Regards
Gary=20
________________________________
From: John Hunter [mailto:jdh...@ni...]
Sent: Wed 3/8/2006 1:19 PM
To: Mitchell, Gary (Gary)
Cc: mat...@li...
Subject: Re: [Matplotlib-users] update to: I can not get matplotlib to =
work on a windows xp professional machine
 Gary> John, Thanks for your help! I edited the path and the
 Gary> dlls are found ok. I still get the message: It still
 Gary> gets an error stating the procedure entry point
 Gary> g_assert_warning could not be located in the dynamic
 Gary> link library libglib-2.0-0.dll. After I click ok on the
 Gary> error message the last line of the dump is displayed
 Gary> before it returns to the command line. Any ideas?
 Gary> Regards Gary
You might want to grab "Dependency Walker" and load the gobject.dll
file that is failing. It will tell you what it is trying to link to
and why it is failing. Did you add the bin and lib subdirs of the GTK
install tree to your PATH? If there are spaces in the install path,
it can be tricky to get right on win32.
Also, please keep replies on list since it will be archived for future
reference.
JDH

 Gary> John, Thanks for your help! I edited the path and the
 Gary> dlls are found ok. I still get the message: It still
 Gary> gets an error stating the procedure entry point
 Gary> g_assert_warning could not be located in the dynamic
 Gary> link library libglib-2.0-0.dll. After I click ok on the
 Gary> error message the last line of the dump is displayed
 Gary> before it returns to the command line. Any ideas?
 Gary> Regards Gary
You might want to grab "Dependency Walker" and load the gobject.dll
file that is failing. It will tell you what it is trying to link to
and why it is failing. Did you add the bin and lib subdirs of the GTK
install tree to your PATH? If there are spaces in the install path,
it can be tricky to get right on win32.
Also, please keep replies on list since it will be archived for future
reference.
JDH

>>>>> "David" == David Huard <dav...@gm...> writes:
 David> If you don't want to use Ipython, you could change the
 David> backend to Agg, which is non interactive (figures won't pop
 David> up), save figures to a file and open it with a viewer. For
 David> instance, the following should work from any ide.
Alternatively, you can use the TkAgg backend from the standard python
shell with interactive set to True, as described on
http://matplotlib.sourceforge.net/interactive.html
JDH

Hi Gary,
What python ide are you using ? The interactive usage of matplotlib
only works for certain editors, and it depends on what backend you
use. The editor that most (I think) people use on this list is
ipython, which has been designed to work with matplotlib and has a
number of very useful features. From what I understand, executing
ipython with the -pylab flag tells ipython to import pylab and tells
it how to deal with figure windows popping out.
If you don't want to use Ipython, you could change the backend to Agg,
which is non interactive (figures won't pop up), save figures to a
file and open it with a viewer. For instance, the following should
work from any ide.
from pylab import *
plot([1,2,3])
title('test')
savefig('test')
To use the interactive mode, you'll have to use an editor supporting
matplotlib. This is discussed in the user's guide.
Good luck
David
2006年3月8日, Mitchell, Gary (Gary) <gm...@ag...>:
> Hello,
> I have installed python 2.4.2 with numpy and scipy installed and when I t=
ry to import pylab, I get:
> python.exe has encountered a problem and needs to close. We are sorry for=
 the inconvenience.
>
> Has any one seen this issue? I just started using python so am not sure =
what to do. I installed pygtk and freetype and set the matplotlibrc file t=
o:
>
> #### CONFIGURATION BEGINS HERE
> # the default backend; one of GTK GTKAgg GTKCairo FltkAgg QtAgg TkAgg
> # Agg Cairo GD GDK Paint PS SVG Template
> backend : GTKAgg
> numerix : numpy # numpy, Numeric or numarray
>
> I really would like to use matplotlib but need help solving this problem =
if any one can help it sure would be great!
>
> Regards
>
> Gary Mitchell
>
>
>
>
>
> -------------------------------------------------------
> This SF.Net email is sponsored by xPML, a groundbreaking scripting langua=
ge
> that extends applications into web and mobile media. Attend the live webc=
ast
> and join the prime developer group breaking into this new coding territor=
y!
> http://sel.as-us.falkag.net/sel?cmdlnk&kid=110944&bid1720ドル&dat=121642
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>

>>>>> "Mitchell," == Mitchell, Gary (Gary) <gm...@ag...> writes:
 Mitchell,> I have installed the following versions of packages
 Mitchell,> matplotlib 0.87.1 numpy 0.9.5 scipy 0.4.6 GTK-
 Mitchell,> Runtime-Environment-2.2.4-3 pygtk-2.8.4-1 and python
 Mitchell,> does not exit but I had to go get
 Mitchell,> libglib-2.0-0.dll,iconv.dll and intl.dll when I try to
 Mitchell,> use GTKAgg backend. It still gets an error stating the
 Mitchell,> procedure entry point g_assert_warning could not be
 Mitchell,> located in the dynamic link library libglib-2.0-0.dll.
 Mitchell,> So I seem to be getting further but... does anybody
 Mitchell,> know why python could not find the above dll's and how
 Mitchell,> to they get installed? It would seem I need another
 Mitchell,> package?? Regards Gary
Did you set your PATH to point to the gtk lib and bin subdirs as
described on the gtk installation section of
http://matplotlib.sourceforge.net/backends.html (see the "Windows GTK
Quickstart" section)
Also, this FAQ may help
 http://matplotlib.sourceforge.net/faq.html#GTKPATH
If you get it working, consider posting a short entry in the
matplotlib wiki.
Let us know if you have nay other questions...
JDH

Hey Gary,
I haven't used matplotlib in windows for awhile, but when I did, I had
good success with the TkAgg and WXAgg backends. I don't remember if
the TkAgg had other things I needed to install, but I think if you
have wxPython already installed, then WXAgg works well out-of-the-box
(but my memory could be flaky or things could have changed).
Ryan
On 3/8/06, Mitchell, Gary (Gary) <gm...@ag...> wrote:
> I have installed the following versions of packages
>
> matplotlib 0.87.1
> numpy 0.9.5
> scipy 0.4.6
> GTK- Runtime-Environment-2.2.4-3
> pygtk-2.8.4-1 and python does not exit but I had to go get libglib-2.0-0.=
dll,iconv.dll and intl.dll when I try to use GTKAgg backend. It still gets=
 an error stating the procedure entry point g_assert_warning could not be l=
ocated in the dynamic link library libglib-2.0-0.dll.
> So I seem to be getting further but... does anybody know why python coul=
d not find the above dll's and how to they get installed? It would seem I =
need another package??
> Regards
> Gary
>
>
> ________________________________
>
> From: Mitchell, Gary (Gary)
> Sent: Wed 3/8/2006 10:02 AM
> To: mat...@li...
> Subject: I can not get matplotlib to work on a windows xp professional ma=
chine
>
>
> Hello,
> I have installed python 2.4.2 with numpy and scipy installed and when I t=
ry to import pylab, I get:
> python.exe has encountered a problem and needs to close. We are sorry for=
 the inconvenience.
>
> Has any one seen this issue? I just started using python so am not sure =
what to do. I installed pygtk and freetype and set the matplotlibrc file t=
o:
>
> #### CONFIGURATION BEGINS HERE
> # the default backend; one of GTK GTKAgg GTKCairo FltkAgg QtAgg TkAgg
> # Agg Cairo GD GDK Paint PS SVG Template
> backend : GTKAgg
> numerix : numpy # numpy, Numeric or numarray
>
> I really would like to use matplotlib but need help solving this problem =
if any one can help it sure would be great!
>
> Regards
>
> Gary Mitchell
>
>
>
>
>
> -------------------------------------------------------
> This SF.Net email is sponsored by xPML, a groundbreaking scripting langua=
ge
> that extends applications into web and mobile media. Attend the live webc=
ast
> and join the prime developer group breaking into this new coding territor=
y!
> http://sel.as-us.falkag.net/sel?cmdlnk&kid=110944&bid1720ドル&dat=121642
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>

I have installed the following versions of packages
=20
matplotlib 0.87.1
numpy 0.9.5
scipy 0.4.6
GTK- Runtime-Environment-2.2.4-3
pygtk-2.8.4-1 and python does not exit but I had to go get =
libglib-2.0-0.dll,iconv.dll and intl.dll when I try to use GTKAgg =
backend. It still gets an error stating the procedure entry point =
g_assert_warning could not be located in the dynamic link library =
libglib-2.0-0.dll.
So I seem to be getting further but... does anybody know why python =
could not find the above dll's and how to they get installed? It would =
seem I need another package??
Regards
Gary
=20
________________________________
From: Mitchell, Gary (Gary)
Sent: Wed 3/8/2006 10:02 AM
To: mat...@li...
Subject: I can not get matplotlib to work on a windows xp professional =
machine
Hello,
I have installed python 2.4.2 with numpy and scipy installed and when I =
try to import pylab, I get:=20
python.exe has encountered a problem and needs to close. We are sorry =
for the inconvenience.
Has any one seen this issue? I just started using python so am not sure =
what to do. I installed pygtk and freetype and set the matplotlibrc =
file to:
#### CONFIGURATION BEGINS HERE
# the default backend; one of GTK GTKAgg GTKCairo FltkAgg QtAgg TkAgg=20
# Agg Cairo GD GDK Paint PS SVG Template
backend : GTKAgg=20
numerix : numpy # numpy, Numeric or numarray
I really would like to use matplotlib but need help solving this problem =
if any one can help it sure would be great!
Regards
Gary Mitchell
=20

John,
John Hunter wrote:
>>>>>>"Darren" == Darren Dale <dd...@co...> writes:
> 
> Darren> Thank you for the suggestion. How is it compatible with
> Darren> Python-2.3? Do you mean we would include the source for
> Darren> that module in mpl?
> 
> Yep, just as we include pyparsing, et al.
> 
> JDH
What about Python-2.2? Do we still need to stay compatible with that? 
I would be happy to see that go, and officially move the requirement up 
to 2.3, if this has not already been done.
Eric

Ryan, does it make any sense to send me your code offline?
In return, I'll send you something I have that uses Tkinter, vpython, 
and threading (but no MPL). We might not be able to crack each 
other's logic, but we both might learn something.
Hmm... I might have some stuff left over from when I was trying to use 
vpython and MPL for realtime plotting. IIRC, it worked but was slow.
BTW, I ended up using Pmw.Blt for reatime plotting. It works ok and 
is fast, but is a bit scary because development has been moribund (some 
recent signs of activity).
-Gary
Ryan Krauss wrote:
>I am trying to combine matplotlib and vpython (the visual module) and
>I am running into a threading issue (I think that is the issue). I am
>basically trying to create a virtual demo for a feedback controls
>course. I show an animation of a pendulum with different controls (P,
>PD, PID, ...) and then after a few seconds of demo, the visual
>animation loop calls a function that plots the step response of the
>system with pylab. This all works great the first time, and after I
>close the pylab window, the animation starts back up again as I think
>it should. But I can't get additional plot windows to work correctly.
> At first I just called show() at the end of the plot loop. When I
>did that, the first time plotting worked correctly, the second time
>did nothing and the third showed an empty plot (I manually closed the
>plot window each time to resume the annimation thread). Later I added
>a pylab.close('all') after pylab.show() as an attempt to clean up
>after the window closing. Now the first plot is still good, but all
>the rest don't seem to do anything.
>
>Does anyone have any experience making vpython/visual play well with matplotlib?
>
>I am using the TkAgg backend.
>
>Thanks,
>
>Ryan
>
>
>-------------------------------------------------------
>This SF.Net email is sponsored by xPML, a groundbreaking scripting language
>that extends applications into web and mobile media. Attend the live webcast
>and join the prime developer group breaking into this new coding territory!
>http://sel.as-us.falkag.net/sel?cmd=k&kid0944&bid1720ドル&dat1642
>_______________________________________________
>Matplotlib-users mailing list
>Mat...@li...
>https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>
> 
>

Darren Dale wrote:
>On Wednesday 08 March 2006 12:07, you wrote:
> 
>
>>Hi Darren,
>>
>> 
>>
>>>Does anyone know how to catch exit status using os.popen and friends?
>>> 
>>>
>>You may want to switch to subprocess.py. It comes with Python 2.4, but
>>it's backwards compatible with Python2.3 (maybe older). 
>> 
>>
>
>Thank you for the suggestion. How is it compatible with Python-2.3? Do you 
>mean we would include the source for that module in mpl?
> 
>
Yes, exactly.

>>>>> "Darren" == Darren Dale <dd...@co...> writes:
 Darren> Thank you for the suggestion. How is it compatible with
 Darren> Python-2.3? Do you mean we would include the source for
 Darren> that module in mpl?
Yep, just as we include pyparsing, et al.
JDH

On Wednesday 08 March 2006 12:07, you wrote:
> Hi Darren,
>
> >Does anyone know how to catch exit status using os.popen and friends?
>
> You may want to switch to subprocess.py. It comes with Python 2.4, but
> it's backwards compatible with Python2.3 (maybe older). 
Thank you for the suggestion. How is it compatible with Python-2.3? Do you 
mean we would include the source for that module in mpl?

John Hunter wrote:
> The downside of having to use kwargs like this is that you have to
> know about them in advance.
Quite true.
> We could support
> 
> ax.xlim = 0,1
> 
> Simply by defining the appropriate __getattr__ and __setattr__
> functions with the existing code base in just a few lines of code.
> If you want to take a stab at this, I think it would be preferable
> to writing "another interface". Better to improve the OO interface we
> have....
I totally agree. The few things that might be nice would be some of 
pylab's figure, etc. management, with an OO style, but at the moment, 
I'm not even sure what those would be. I guess I need to wait until I 
find I need something, and then worry about it.
My goal had been to write another interface, with the idea that, if you 
liked it, it could get rolled into the main code, but as you seem to be 
interested, there's no reason not to just start rolling it in now.
> The heavy reliance on setters and getters dates to the fact that I was
> a C++ programmer before I was a python programmer
I suspected as much ;-)
Indeed, I've used a fair number of set_this() methods myself, even 
though Python is my first OO language. I'm changing my style more after 
reading "Python is not Java"
> Since there
> is a lot of code built around them at this point (particularly for
> those doing a lot of OO matplotlib including yours truly) I am
> hesitant to completely break it. 
Of course. A major refactor is not the least bit necessary.
> My inclination at this point is to take the path of least resistance
> and simply make properties out of the existing setters and getters.
That sounds good to me. I'm still unclear on what traits buys you. maybe 
I need to look at it again.
> think we could use python properties for this or do our own
> getattr/setattr magic.
I'd just go with properties -- that's what they are for, and it would 
take very little code.
At some point I need to just shut up and write some code (and some 
docs). But there are so many things I want to do!
-Chris
-- 
Christopher Barker, Ph.D.
Oceanographer
 		
NOAA/OR&R/HAZMAT (206) 526-6959 voice
7600 Sand Point Way NE (206) 526-6329 fax
Seattle, WA 98115 (206) 526-6317 main reception
Chr...@no...

Hi Darren,
>Does anyone know how to catch exit status using os.popen and friends?
>
You may want to switch to subprocess.py. It comes with Python 2.4, but
it's backwards compatible with Python2.3 (maybe older). We could just
include it alongside the modules that want to use it. It's pretty easy
to use and is meant to unify all the various ways of executing a subprocess.
Here's an example from some other code of mine (a recursive build tool
that seeks out directories with setup.py and builds them with
setuptools). It should be a good example of using subprocess.
 args = [sys.executable,'-c',"import setuptools; execfile('setup.py')"]
 args.extend(commands)
 
 print dir,':',' '.join(args)
 sub = subprocess.Popen(args,
 cwd=dir,
 stdout=subprocess.PIPE,
 stderr=subprocess.PIPE,
 )
 sub.wait()
 if sub.returncode != 0:
 print '-='*20
 print '*** The following call failed:'
 print args
 stdout = sub.stdout.read()
 if len(stdout):
 print '*** stdout was:'
 print stdout
 stderr = sub.stderr.read()
 if len(stderr):
 print '*** stderr was:'
 print stderr
 print '-='*20
 sys.exit( sub.returncode )

Hello,
I have installed python 2.4.2 with numpy and scipy installed and when I =
try to import pylab, I get:=20
python.exe has encountered a problem and needs to close. We are sorry =
for the inconvenience.
Has any one seen this issue? I just started using python so am not sure =
what to do. I installed pygtk and freetype and set the matplotlibrc =
file to:
#### CONFIGURATION BEGINS HERE
# the default backend; one of GTK GTKAgg GTKCairo FltkAgg QtAgg TkAgg=20
# Agg Cairo GD GDK Paint PS SVG Template
backend : GTKAgg=20
numerix : numpy # numpy, Numeric or numarray
I really would like to use matplotlib but need help solving this problem =
if any one can help it sure would be great!
Regards
Gary Mitchell
=20