Fixing matplotlib for wxPython 2.8

Development matplotlib-devel
1

It seems that matplotlib needs the following patch for wxPython 2.8
(traceback hard to replicate, as you need to import wx before importing
matplotlib):

Index: lib/matplotlib/backends/backend_wx.py

···

===================================================================
--- lib/matplotlib/backends/backend_wx.py (revision 7250)
+++ lib/matplotlib/backends/backend_wx.py (working copy)
@@ -117,7 +117,7 @@

try:
     wxversion.ensureMinimal('2.8')
-except wxversion.AlreadyImportedError:
+except wxversion.VersionError:
     pass

try:

And, by the way, I just had a brain fart, and sent a stupid e-mail on the
same subject. I am not sure where it went, but please disregard it.

Cheers;

Gaël

2

Gael Varoquaux wrote:

It seems that matplotlib needs the following patch for wxPython 2.8
(traceback hard to replicate, as you need to import wx before importing
matplotlib):

Index: lib/matplotlib/backends/backend_wx.py

--- lib/matplotlib/backends/backend_wx.py (revision 7250)
+++ lib/matplotlib/backends/backend_wx.py (working copy)
@@ -117,7 +117,7 @@
  try:
     wxversion.ensureMinimal('2.8')
-except wxversion.AlreadyImportedError:
+except wxversion.VersionError:
     pass
  try:

No, that is not a good solution:
http://www.mail-archive.com/matplotlib-devel@lists.sourceforge.net/msg05003.html

Eric

···

And, by the way, I just had a brain fart, and sent a stupid e-mail on the
same subject. I am not sure where it went, but please disregard it.

Cheers;

Gaël

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3

OK, but right now MPL is broken with my version of wxversion, which is the
one shipped by default in Ubuntu. So it is broken for a lot of user.

It seems wrong for me to require the users to upgrade wxversion while
there is a solution that works, eventhough it may not be exactly what you
want.

One solution is to do bugware with hasattr(wxversion, 'AlreadyImportedError')

Gaël

···

On Fri, Jul 10, 2009 at 08:12:14AM -1000, Eric Firing wrote:

Gael Varoquaux wrote:

It seems that matplotlib needs the following patch for wxPython 2.8
(traceback hard to replicate, as you need to import wx before importing
matplotlib):

Index: lib/matplotlib/backends/backend_wx.py

--- lib/matplotlib/backends/backend_wx.py (revision 7250)
+++ lib/matplotlib/backends/backend_wx.py (working copy)
@@ -117,7 +117,7 @@
  try:
     wxversion.ensureMinimal('2.8')
-except wxversion.AlreadyImportedError:
+except wxversion.VersionError:
     pass
  try:

No, that is not a good solution:
Re: [matplotlib-devel] Selecting WX2.8 causes problems on wx 2.8.4

4

Gael Varoquaux wrote:

Gael Varoquaux wrote:

It seems that matplotlib needs the following patch for wxPython 2.8
(traceback hard to replicate, as you need to import wx before importing
matplotlib):

Index: lib/matplotlib/backends/backend_wx.py

--- lib/matplotlib/backends/backend_wx.py (revision 7250)
+++ lib/matplotlib/backends/backend_wx.py (working copy)
@@ -117,7 +117,7 @@
  try:
     wxversion.ensureMinimal('2.8')
-except wxversion.AlreadyImportedError:
+except wxversion.VersionError:
     pass
  try:

No, that is not a good solution:
Re: [matplotlib-devel] Selecting WX2.8 causes problems on wx 2.8.4

OK, but right now MPL is broken with my version of wxversion, which is the
one shipped by default in Ubuntu. So it is broken for a lot of user.

Are you sure? Could you be pulling in some other wxversion? The only other person reporting this problem so far is Tony Yu. I am now on jaunty, and my wxversion has AlreadyImportedError. What version of ubuntu are you using, and what is the full wx version that it includes?

It seems wrong for me to require the users to upgrade wxversion while
there is a solution that works, eventhough it may not be exactly what you
want.

The solution you propose doesn't work. It completely defeats the version check.

One solution is to do bugware with hasattr(wxversion, 'AlreadyImportedError')

Committed to svn. Please check it.

Eric

···

On Fri, Jul 10, 2009 at 08:12:14AM -1000, Eric Firing wrote:

Gaël

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5

OK, but right now MPL is broken with my version of wxversion, which is the
one shipped by default in Ubuntu. So it is broken for a lot of user.

Are you sure? Could you be pulling in some other wxversion? The only
other person reporting this problem so far is Tony Yu. I am now on
jaunty, and my wxversion has AlreadyImportedError. What version of
ubuntu are you using, and what is the full wx version that it includes?

Ha, interesting:

$ ipython
Python 2.6.2 (release26-maint, Apr 19 2009, 01:56:41)
Type "copyright", "credits" or "license" for more information.

IPython 0.10.bzr.r1163 -- An enhanced Interactive Python.
? -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help -> Python's own help system.
object? -> Details about 'object'. ?object also works, ?? prints more.

In [1]: import wxversion

In [2]: wxversion.__file__
Out[2]: '/usr/lib/python2.6/dist-packages/wx-2.6-gtk2-unicode/wxversion.pyc'

So, if wx2.6 is installed (I have 2.8 installed too), we run into these
problem.

Also, it is interesting to see that the older wxversion gets imported.
That does defeat the purpose of wxversion :). It means that you can't
have multiple versions of wx installed.

It seems wrong for me to require the users to upgrade wxversion while
there is a solution that works, eventhough it may not be exactly what you
want.

The solution you propose doesn't work. It completely defeats the
version check.

In a way it does. So we can add a check:

"if 'wx' in sys.module:"

to replace the "AlreadyImportedError", it is clearly bug ware.

One solution is to do bugware with hasattr(wxversion, 'AlreadyImportedError')

Committed to svn. Please check it.

Certainly does work betters. Also, the "AlreadyImported" problem is
caught elsewhere if I preimport an older version of wx:

File "/home/varoquau/dev/matplotlib/lib/pylab.py", line 1, in <module>
    from matplotlib.pylab import *
  File "/home/varoquau/dev/matplotlib/lib/matplotlib/pylab.py", line 244,
in <module>
    from matplotlib.pyplot import *
  File "/home/varoquau/dev/matplotlib/lib/matplotlib/pyplot.py", line 76,
in <module>
    new_figure_manager, draw_if_interactive, show = pylab_setup()
  File
"/home/varoquau/dev/matplotlib/lib/matplotlib/backends/__init__.py", line
25, in pylab_setup
    globals(),locals(),[backend_name])
  File
"/home/varoquau/dev/matplotlib/lib/matplotlib/backends/backend_wxagg.py",
line 23, in <module>
    import backend_wx # already uses wxversion.ensureMinimal('2.8')
  File
"/home/varoquau/dev/matplotlib/lib/matplotlib/backends/backend_wx.py",
line 137, in <module>
    raise ImportError(missingwx)
ImportError: Matplotlib backend_wx and backend_wxagg require wxPython >=2.8

Thanks for your fix.

Gaël

···

On Fri, Jul 10, 2009 at 09:41:30AM -1000, Eric Firing wrote:

6

Actually, I beg your pardon, but it does not really work: if you have
2.6 and 2.8 installed, it will still import 2.6, which is not what you
want.

Here is a patch that works a bit better: it does import 2.8 even when 2.6
is installed:

Index: lib/matplotlib/backends/backend_wx.py

···

On Fri, Jul 10, 2009 at 11:05:24PM +0200, Gael Varoquaux wrote:

> Committed to svn. Please check it.

Certainly does work betters.

===================================================================
--- lib/matplotlib/backends/backend_wx.py (revision 7251)
+++ lib/matplotlib/backends/backend_wx.py (working copy)
@@ -124,6 +124,12 @@
else:
     warnings.warn(
             "Update your wxversion.py to one including
AlreadyImportedError")
+ try:
+ wxversion.ensureMinimal('2.8')
+ except wxversion.VersionError:
+ pass
+
+

try:
     import wx

Thanks for your work,

Gaël

7

Gael Varoquaux wrote:

Committed to svn. Please check it.

Certainly does work betters.

Actually, I beg your pardon, but it does not really work: if you have
2.6 and 2.8 installed, it will still import 2.6, which is not what you
want.

Here is a patch that works a bit better: it does import 2.8 even when 2.6
is installed:

Committed, thank you.

Eric

···

On Fri, Jul 10, 2009 at 11:05:24PM +0200, Gael Varoquaux wrote:

Index: lib/matplotlib/backends/backend_wx.py

--- lib/matplotlib/backends/backend_wx.py (revision 7251)
+++ lib/matplotlib/backends/backend_wx.py (working copy)
@@ -124,6 +124,12 @@
else:
     warnings.warn(
             "Update your wxversion.py to one including
AlreadyImportedError")
+ try:
+ wxversion.ensureMinimal('2.8')
+ except wxversion.VersionError:
+ pass
+ +
  try:
     import wx

Thanks for your work,

Gaël

8

I just updated mpl from svn and now get

y:126: UserWarning: Update your wxversion.py to one including
AlreadyImportedError
  "Update your wxversion.py to one including AlreadyImportedError")
backend WXAgg version 2.8.3.0

If I can speak for the typical user, these kinds of warnings are
usually annoying and not that helpful. I am a naive wx user -- I
installed it many moons ago from a binary when I installed python and
haven't thought about it since. I don't know what wxversion is or how
to upgrade it. All I know is mpl was working fine, still works fine,
and now generates an annoying warning. So I am not sure this is
progress, but may help someone who has a complicated wx setup avoid
difficult to trackdown bug. So I would prefer to silence this, but
am not sure what the right solution is. Here is my wx installation

In [6]: wx.__version__
Out[6]: '2.8.3.0'

In [7]: !ls -ld
/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/wx*
drwxrwxr-x 5 root admin 170 Mar 22 2007
/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/wx-2.8-mac-unicode
-rw-r--r-- 1 root admin 18 Mar 22 2007
/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/wx.pth
-rw-r--r-- 1 root admin 1266 Mar 22 2007
/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/wxPython_common-2.8.3.0-py2.5.egg-info
drwxr-xr-x 5 root admin 170 Mar 22 2007
/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/wxaddons
-rw-r--r-- 1 root admin 1259 Mar 22 2007
/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/wxaddons-2.8.3.0-py2.5.egg-info
-rw-r--r-- 1 root admin 17809 Mar 16 2006
/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/wxversion.py
-rw-r--r-- 1 jdhunter admin 15750 Mar 23 20:28
/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/wxversion.pyc

JDH

···

On Fri, Jul 10, 2009 at 4:33 PM, Eric Firing<efiring@...229...> wrote:

Gael Varoquaux wrote:

On Fri, Jul 10, 2009 at 11:05:24PM +0200, Gael Varoquaux wrote:

Committed to svn. Please check it.

Certainly does work betters.

Actually, I beg your pardon, but it does not really work: if you have
2.6 and 2.8 installed, it will still import 2.6, which is not what you
want.

Here is a patch that works a bit better: it does import 2.8 even when 2.6
is installed:

Committed, thank you.

9

I am a bit like you. I believe these warning are not terribly helpful.

Can you do an 'import wxversion; print wxversion.__file__', so that we
understand better why you are getting these warnings.

Cheers,

Gaël

···

On Sat, Jul 11, 2009 at 12:38:13PM -0500, John Hunter wrote:

If I can speak for the typical user, these kinds of warnings are
usually annoying and not that helpful. I am a naive wx user -- I
installed it many moons ago from a binary when I installed python and
haven't thought about it since. I don't know what wxversion is or how
to upgrade it. All I know is mpl was working fine, still works fine,
and now generates an annoying warning. So I am not sure this is
progress, but may help someone who has a complicated wx setup avoid
difficult to trackdown bug. So I would prefer to silence this, but
am not sure what the right solution is. Here is my wx installation

10

In [1]: import wxversion

In [2]: print wxversion.__file__
/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/wxversion.pyc

In [3]: import wx

In [4]: print wx.__version__
2.8.3.0

In [5]: print wx.__file__
/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/wx-2.8-mac-unicode/wx/__init__.pyc

In [6]: wxversion.
wxversion.UPDATE_URL wxversion.__setattr__
wxversion.VersionError wxversion.__str__
wxversion._EM_DEBUG wxversion._find_default
wxversion.__builtins__ wxversion._find_installed
wxversion.__class__ wxversion._get_best_match
wxversion.__delattr__ wxversion._pattern
wxversion.__dict__ wxversion._selected
wxversion.__doc__ wxversion._wxPackageInfo
wxversion.__file__ wxversion.checkInstalled
wxversion.__getattribute__ wxversion.ensureMinimal
wxversion.__hash__ wxversion.fnmatch
wxversion.__init__ wxversion.getInstalled
wxversion.__name__ wxversion.glob
wxversion.__new__ wxversion.os
wxversion.__reduce__ wxversion.re
wxversion.__reduce_ex__ wxversion.select
wxversion.__repr__ wxversion.sys

In [6]: wxversion.getInstalled?
Type: function
Base Class: <type 'function'>
String Form: <function getInstalled at 0xe62e30>
Namespace: Interactive
File: /Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/wxversion.py
Definition: wxversion.getInstalled()
Docstring:
    Returns a list of strings representing the installed wxPython
    versions that are found on the system.

In [7]: wxversion.getInstalled()
Out[7]: ['2.8-mac-unicode']

···

On Sat, Jul 11, 2009 at 12:43 PM, Gael Varoquaux<gael.varoquaux@...427...> wrote:

On Sat, Jul 11, 2009 at 12:38:13PM -0500, John Hunter wrote:

If I can speak for the typical user, these kinds of warnings are
usually annoying and not that helpful. I am a naive wx user -- I
installed it many moons ago from a binary when I installed python and
haven't thought about it since. I don't know what wxversion is or how
to upgrade it. All I know is mpl was working fine, still works fine,
and now generates an annoying warning. So I am not sure this is
progress, but may help someone who has a complicated wx setup avoid
difficult to trackdown bug. So I would prefer to silence this, but
am not sure what the right solution is. Here is my wx installation

I am a bit like you. I believe these warning are not terribly helpful.

Can you do an 'import wxversion; print wxversion.__file__', so that we
understand better why you are getting these warnings.

11

Hell, sorry, I don't understand why you are getting the warning.

Gaël

···

On Sat, Jul 11, 2009 at 12:49:03PM -0500, John Hunter wrote:

> Can you do an 'import wxversion; print wxversion.__file__', so that we
> understand better why you are getting these warnings.

In [1]: import wxversion

In [2]: print wxversion.__file__
/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/wxversion.pyc

12

Gael Varoquaux wrote:

···

On Sat, Jul 11, 2009 at 12:49:03PM -0500, John Hunter wrote:

Can you do an 'import wxversion; print wxversion.__file__', so that we
understand better why you are getting these warnings.

In [1]: import wxversion

In [2]: print wxversion.__file__
/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/wxversion.pyc

Hell, sorry, I don't understand why you are getting the warning.

Gaël

OK, I tried again in svn 7256. I think this is a little cleaner. More diagnostic information could still be added to the exception messages if this is going to be a continuing problem.

Eric

13

It seems to work for me in all the configurations I can think of (and
does raises the error when 2.6 is imported instead of 2.8.). I could be
forgetting configurations, as the combinatory is high.

These things are hard problems, thanks for your work.

Gaël

···

On Sat, Jul 11, 2009 at 08:10:23AM -1000, Eric Firing wrote:

OK, I tried again in svn 7256. I think this is a little cleaner. More
diagnostic information could still be added to the exception messages if
this is going to be a continuing problem.

14

Gael Varoquaux wrote:

···

On Sat, Jul 11, 2009 at 08:10:23AM -1000, Eric Firing wrote:

OK, I tried again in svn 7256. I think this is a little cleaner. More diagnostic information could still be added to the exception messages if this is going to be a continuing problem.

It seems to work for me in all the configurations I can think of (and
does raises the error when 2.6 is imported instead of 2.8.). I could be
forgetting configurations, as the combinatory is high.

These things are hard problems, thanks for your work.

Thank you for the testing and reporting. I don't normally use wx and I am not willing to fiddle with multiple versions of it, so I am working almost blind on this.

Eric

15

This is working for me, and by working I mean not displaying the warning...

Thanks Eric
JDH

···

On Sat, Jul 11, 2009 at 1:18 PM, Eric Firing<efiring@...229...> wrote:

These things are hard problems, thanks for your work.

Thank you for the testing and reporting. I don't normally use wx and I am
not willing to fiddle with multiple versions of it, so I am working almost
blind on this.

16

I use wx a lot, and with MPL embedded in other programs, so I am a good
test bed, and will hopefully catch major problems. However, I of course
cover only the configurations I have installed on the various boxes I
work on.

One of the really nice things with MPL, is that there is a significant
user base working from SVN, and thus catching problems early.

Gaël

···

On Sat, Jul 11, 2009 at 08:18:25AM -1000, Eric Firing wrote:

Thank you for the testing and reporting. I don't normally use wx and I
am not willing to fiddle with multiple versions of it, so I am working
almost blind on this.