matplotlib-users

[Matplotlib-users] matplotlib ignoring .matplotlibrc?

[David B. <db...@ya...>]

I installed the matplotlib-1.52.win32-py2.3 binary on
python23 (Enthought).  I don't want to install a lot
of extra packages so I found the existing
.matplotlibrc in C:\Python23\share\matplotlib and
modified the backend to "backend      : TkAgg".  But
when I try to import matplotlib it appears to be still
looking for the default Gtk backend.  

I noticed that sys.path did not contain
C:\Python23\share\matplotlib so I tried adding it. 
Still no luck.

Here's the error message:

IDLE 1.0      ==== No Subprocess ====
>>> from matplotlib.matlab import *

No module named pygtk
matplotlib requires pygtk-1.99.16 or greater -- trying
anyway.  Please hold on
Traceback (most recent call last):
  File "<pyshell#0>", line 1, in ?
    from matplotlib.matlab import *
  File
"C:\Python23\Lib\site-packages\matplotlib\matlab.py",
line 127, in ?
    from backends import new_figure_manager,
error_msg, \
  File
"C:\Python23\Lib\site-packages\matplotlib\backends\__init__.py",
line 16, in ?
    from backend_gtk import  \
  File
"C:\Python23\Lib\site-packages\matplotlib\backends\backend_gtk.py",
line 13, in ?
    import gobject
ImportError: No module named gobject
>>> 


Any ideas on why this does not work?  Should my python
path contain the path to share\matplotlib ?
-- David

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Re: [Matplotlib-users] matplotlib ignoring .matplotlibrc?

[John H. <jdh...@ac...>]

>>>>> "David" == David Brown <db...@ya...> writes:

    David> I installed the matplotlib-1.52.win32-py2.3 binary on
    David> python23 (Enthought).  I don't want to install a lot of
    David> extra packages so I found the existing .matplotlibrc in
    David> C:\Python23\share\matplotlib and modified the backend to
    David> "backend : TkAgg".  But when I try to import matplotlib it
    David> appears to be still looking for the default Gtk backend.

    David> I noticed that sys.path did not contain
    David> C:\Python23\share\matplotlib so I tried adding it.  Still
    David> no luck.

It has nothing to do with sys.path, so you can safely ignore this.

    David> Here's the error message:

    David> IDLE 1.0 ==== No Subprocess ====
            ^^^

Ahh the golden piece of information.  Todd Miller has reported that
idle does not seem to respect matplotlibrc.  At this point we have no
idea why.  We'll try to get this figured out ASAP!

As a test case, try to run a matplotlib script from the DOS prompt

C:> python somefile.py

and see if TkAgg launches.  If so, we can be fairly sure it's idle.
Probably just double clicking on one of the examples from the zip
distribution will be enough, but you lose the traceback this way if
there is an error.

Let me know,
JDH

Re: [Matplotlib-users] matplotlib ignoring .matplotlibrc?

[John H. <jdh...@ac...>]

>>>>> "John" == John Hunter <jdh...@ac...> writes:

    John> Ahh the golden piece of information.  Todd Miller has
    John> reported that idle does not seem to respect matplotlibrc.
    John> At this point we have no idea why.  We'll try to get this
    John> figured out ASAP!

I found one problem.  IDLE sets the HOME variable, and there is a bug
in the way matplotlib located the rc file.  Basically, if HOME is set,
it expects the rc file to be there.  Here is a fix.

Edit C:\Python23\Lib\site-packages\matplotlib\__init__.py and replace
the function matplotlib_fname with the following

def matplotlib_fname():
    'Return the path to the rc file'
    if os.environ.has_key('MATPLOTLIBRC'):
        path =  os.environ['MATPLOTLIBRC']
        if os.path.exists(path):
            fname = os.path.join(path, '.matplotlibrc')
            if os.path.exists(fname):
                return fname

    if os.environ.has_key('HOME'):
        path =  os.environ['HOME']
        if os.path.exists(path):
            fname = os.path.join(path, '.matplotlibrc')
            if os.path.exists(fname):
                return fname

    path =  get_data_path() # guaranteed to exist or raise
    fname = os.path.join(path, '.matplotlibrc')
    if not os.path.exists(fname):
        print >> sys.stderr, 'Could not find .matplotlibrc; using defaults'
    return fname

I tested this on windows with idle.  Idle now respects matplotlibrc
and loads TkAgg.  However, at least on my system, there is still some
idle bug because the Tk window launches and then freezes without
displaying the figure I suspect Todd, the TkAgg author, will be
looking at this soon.  [Todd, I had this problem with or without
window_focus set in my test].

Sorry for the troubles,
JDH

Re: [Matplotlib-users] matplotlib ignoring .matplotlibrc?

[Todd M. <jm...@st...>]

On Thu, 2004-04-01 at 08:55, John Hunter wrote:
> >>>>> "John" == John Hunter <jdh...@ac...> writes:
> I tested this on windows with idle.  Idle now respects matplotlibrc
> and loads TkAgg.  However, at least on my system, there is still some
> idle bug because the Tk window launches and then freezes without
> displaying the figure I suspect Todd, the TkAgg author, will be
> looking at this soon.  [Todd, I had this problem with or without
> window_focus set in my test].

I googled around on this and got a suggestion having to do with mainloop
handling from an old Guido e-mail.  IDLE has a -n switch which you can
add to the end of the windows shortcut command line (Target:) under the
shortcut properties.  When I did this,  matplotlib is unfrozen.  The
e-mail is a little ominous about using the switch:  I think a failure in
matplotlib could also bring down IDLE and any open windows it might have
lying around (like, say, a plot script!).  Guido also suggests that
running the matplotlib Tkinter mainloop in its own thread to avoid using
-n is a bad idea.  This is looking dicey.  We might want to make a note
that using IDLE with -n can be done but is considered risky.

Here's Guido:
http://aspn.activestate.com/ASPN/Mail/Message/edu-sig/1818398

Regards,
Todd

-- 
Todd Miller <jm...@st...>