Confirming problem with matplotlib.pyplot.show()

Community matplotlib-users
1

Hello all
I am seeing a problem similar to that seen by Jorge Scandaliaris.
When I run python or ipython -pylab, show() apparently hangs. When I enter
CTRL-C, the cursor re-appars, but show() now gives an error message, until I
call figure(). This behaviour is repeatable. See trace below.
Matplotlib version 1.0.0 from openSUSE RPMs. Other versions:

libpython2_6-1_0-2.6.2-6.5.1.x86_64
libpython2_6-1_0-32bit-2.6.2-6.5.1.x86_64
python-2.6.2-6.5.1.x86_64
python-base-2.6.2-6.5.1.x86_64
python-matplotlib-1.0.0-5.1.x86_64
python-matplotlib-tk-1.0.0-5.1.x86_64
python-matplotlib-wx-1.0.0-5.1.x86_64
python-numpy-1.5.0-17.1.x86_64
python-scipy-0.8.0-12.1.x86_64
python-tk-2.6.2-6.5.1.x86_64
tk-8.5.7-3.1.x86_64

Best, Paul

Python 2.6.2 (r262:71600, Jun 17 2010, 13:37:45)
[GCC 4.4.1 [gcc-4_4-branch revision 150839]] on linux2
Type "help", "copyright", "credits" or "license" for more information.

import matplotlib.pyplot as plt
fig=plt.figure()
plt.show()

^CTraceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib64/python2.6/site-
packages/matplotlib/backends/backend_tkagg.py", line 74, in show
    Tk.mainloop()
  File "/usr/lib64/python2.6/lib-tk/Tkinter.py", line 325, in mainloop
    _default_root.tk.mainloop(n)
KeyboardInterrupt

plt.show()

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib64/python2.6/site-
packages/matplotlib/backends/backend_tkagg.py", line 74, in show
    Tk.mainloop()
  File "/usr/lib64/python2.6/lib-tk/Tkinter.py", line 325, in mainloop
    _default_root.tk.mainloop(n)
AttributeError: 'NoneType' object has no attribute 'tk'

fig=plt.figure()
plt.show()

^CTraceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib64/python2.6/site-
packages/matplotlib/backends/backend_tkagg.py", line 74, in show
    Tk.mainloop()
  File "/usr/lib64/python2.6/lib-tk/Tkinter.py", line 325, in mainloop
    _default_root.tk.mainloop(n)
KeyboardInterrupt

import matplotlib
matplotlib.__version__

'1.0.0'

2

I downgraded from matplotlib 1.0.0 to matplotlib 0.99 and my original problem
no longer appears:

leopardi@...3314...:~/src/Working/Working-0.5.1/glucat/pyclical> rpm -q -a |
grep matplotlib | sort
python-matplotlib-0.99.1.1-0.pm.1.8.x86_64
leopardi@...3314...:~/src/Working/Working-0.5.1/glucat/pyclical> ipython -pylab
Your PyGtk has set_interactive(), so you can use the
more stable single-threaded Gtk mode.
See Bug #270856 “IPython hangs with PyGTK” : Bugs : IPython
Python 2.6.2 (r262:71600, Jun 17 2010, 13:37:45)
Type "copyright", "credits" or "license" for more information.

IPython 0.10 -- 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.

  Welcome to pylab, a matplotlib-based Python environment.
  For more information, type 'help(pylab)'.

In [1]: from mpl_toolkits.mplot3d import Axes3D

In [2]: import matplotlib.pyplot as plt

In [3]: fig=plt.figure()
/usr/lib64/python2.6/site-packages/matplotlib/backends/backend_gtk.py:621:
DeprecationWarning: Use the new widget gtk.Tooltip
  self.tooltips = gtk.Tooltips()

In [4]: ax=Axes3D(fig)

In [5]: plt.show()

In [6]: quit()
Do you really want to exit ([y]/n)? y
Closing threads... Done.

After upgrading to Matplotlib 0.99:

leopardi@...3314...:~/src/Working/Working-0.5.1/glucat/pyclical> rpm -q -a |
grep matplotlib | sort
python-matplotlib-1.0.0-9.2.x86_64
python-matplotlib-tk-1.0.0-9.2.x86_64
python-matplotlib-wx-1.0.0-9.2.x86_64

leopardi@...3314...:~/src/Working/Working-0.5.1/glucat/pyclical> ipython -pylab
Python 2.6.2 (r262:71600, Jun 17 2010, 13:37:45)
Type "copyright", "credits" or "license" for more information.

IPython 0.10 -- 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.

  Welcome to pylab, a matplotlib-based Python environment.
  For more information, type 'help(pylab)'.

In [1]: from mpl_toolkits.mplot3d import Axes3D

In [2]: import matplotlib.pyplot as plt

In [3]: fig=plt.figure()

In [4]: ax=Axes3D(fig)

In [5]: plt.show()
^CERROR: An unexpected error occurred while tokenizing input
The following traceback may be corrupted or invalid
The error message is: ('EOF in multi-line statement', (206, 0))

···

On Saturday 09 October 2010 22:58:04 Paul Leopardi wrote:

Hello all
I am seeing a problem similar to that seen by Jorge Scandaliaris.

---------------------------------------------------------------------------
KeyboardInterrupt Traceback (most recent call last)

/home/leopardi/src/Working/Working-0.5.1/glucat/pyclical/<ipython console> in
<module>()

/usr/lib64/python2.6/site-packages/matplotlib/backends/backend_tkagg.pyc in
show()
     72 for manager in Gcf.get_all_fig_managers():
     73 manager.show()
---> 74 Tk.mainloop()
     75
     76 def new_figure_manager(num, *args, **kwargs):

/usr/lib64/python2.6/lib-tk/Tkinter.pyc in mainloop(n)
    323 def mainloop(n=0):
    324 """Run the main loop of Tcl."""
--> 325 _default_root.tk.mainloop(n)
    326
    327 getint = int

KeyboardInterrupt:

In [6]:
In [6]: quit()
Do you really want to exit ([y]/n)? y

3

I believe this was a known issue that came about from some fixes made to the behavior of show() for the 1.0 release. It was patched shortly thereafter and the maintenance branch was also patched. As a workaround, I believe you can try one of the other backends or install matplotlib from source.

Does anybody know who maintains the packages for OpenSUSE? It would probably be prudent to poke them to update.

Ben Root

···

On Sat, Oct 9, 2010 at 7:41 AM, Paul Leopardi <paul.leopardi@…3313…> wrote:

On Saturday 09 October 2010 22:58:04 Paul Leopardi wrote:

Hello all

I am seeing a problem similar to that seen by Jorge Scandaliaris.

I downgraded from matplotlib 1.0.0 to matplotlib 0.99 and my original problem

no longer appears:

leopardi@…3314…:~/src/Working/Working-0.5.1/glucat/pyclical> rpm -q -a |

grep matplotlib | sort

python-matplotlib-0.99.1.1-0.pm.1.8.x86_64

leopardi@…3314…:~/src/Working/Working-0.5.1/glucat/pyclical> ipython -pylab

Your PyGtk has set_interactive(), so you can use the

more stable single-threaded Gtk mode.

See https://bugs.launchpad.net/ipython/+bug/270856
Python 2.6.2 (r262:71600, Jun 17 2010, 13:37:45)

Type “copyright”, “credits” or “license” for more information.

IPython 0.10 – 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.

Welcome to pylab, a matplotlib-based Python environment.

For more information, type ‘help(pylab)’.

In [1]: from mpl_toolkits.mplot3d import Axes3D

In [2]: import matplotlib.pyplot as plt

In [3]: fig=plt.figure()

/usr/lib64/python2.6/site-packages/matplotlib/backends/backend_gtk.py:621:

DeprecationWarning: Use the new widget gtk.Tooltip

self.tooltips = gtk.Tooltips()

In [4]: ax=Axes3D(fig)

In [5]: plt.show()

In [6]: quit()

Do you really want to exit ([y]/n)? y

Closing threads… Done.

After upgrading to Matplotlib 0.99:

leopardi@…3314…:~/src/Working/Working-0.5.1/glucat/pyclical> rpm -q -a |

grep matplotlib | sort

python-matplotlib-1.0.0-9.2.x86_64

python-matplotlib-tk-1.0.0-9.2.x86_64

python-matplotlib-wx-1.0.0-9.2.x86_64

leopardi@…3314…:~/src/Working/Working-0.5.1/glucat/pyclical> ipython -pylab
Python 2.6.2 (r262:71600, Jun 17 2010, 13:37:45)

Type “copyright”, “credits” or “license” for more information.

IPython 0.10 – 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.

Welcome to pylab, a matplotlib-based Python environment.

For more information, type ‘help(pylab)’.

In [1]: from mpl_toolkits.mplot3d import Axes3D

In [2]: import matplotlib.pyplot as plt

In [3]: fig=plt.figure()

In [4]: ax=Axes3D(fig)

In [5]: plt.show()

^CERROR: An unexpected error occurred while tokenizing input

The following traceback may be corrupted or invalid

The error message is: (‘EOF in multi-line statement’, (206, 0))

KeyboardInterrupt Traceback (most recent call last)

/home/leopardi/src/Working/Working-0.5.1/glucat/pyclical/ in

()

/usr/lib64/python2.6/site-packages/matplotlib/backends/backend_tkagg.pyc in

show()

 72     for manager in Gcf.get_all_fig_managers():

 73         manager.show()

—> 74 Tk.mainloop()

 75

 76 def new_figure_manager(num, *args, **kwargs):

/usr/lib64/python2.6/lib-tk/Tkinter.pyc in mainloop(n)

323 def mainloop(n=0):

324     """Run the main loop of Tcl."""

→ 325 _default_root.tk.mainloop(n)

326

327 getint = int

KeyboardInterrupt:

In [6]:

In [6]: quit()

Do you really want to exit ([y]/n)? y

4

Hello All,
I am running into same issue except mine won’t go away even when I went back to matplotlib 0.99.
Also, something curious I noticed - when I run the examples, I don’t get this error message. Please let me know if you have any suggestions.
Thanks!
Pradyumna

···

Benjamin Root-2 wrote:

On Sat, Oct 9, 2010 at 7:41 AM, Paul Leopardi > wrote:

On Saturday 09 October 2010 22:58:04 Paul Leopardi wrote:

Hello all
I am seeing a problem similar to that seen by Jorge Scandaliaris.

I downgraded from matplotlib 1.0.0 to matplotlib 0.99 and my original
problem
no longer appears:

leopardi@…3314…:~/src/Working/Working-0.5.1/glucat/pyclical> rpm -q -a |
grep matplotlib | sort
python-matplotlib-0.99.1.1-0.pm.1.8.x86_64
leopardi@…3314…:~/src/Working/Working-0.5.1/glucat/pyclical> ipython
-pylab
Your PyGtk has set_interactive(), so you can use the
more stable single-threaded Gtk mode.
See Bug #270856 “IPython hangs with PyGTK” : Bugs : IPython
Python 2.6.2 (r262:71600, Jun 17 2010, 13:37:45)
Type “copyright”, “credits” or “license” for more information.

IPython 0.10 – 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.

Welcome to pylab, a matplotlib-based Python environment.
For more information, type ‘help(pylab)’.

In [1]: from mpl_toolkits.mplot3d import Axes3D

In [2]: import matplotlib.pyplot as plt

In [3]: fig=plt.figure()
/usr/lib64/python2.6/site-packages/matplotlib/backends/backend_gtk.py:621:
DeprecationWarning: Use the new widget gtk.Tooltip
self.tooltips = gtk.Tooltips()

In [4]: ax=Axes3D(fig)

In [5]: plt.show()

In [6]: quit()
Do you really want to exit ([y]/n)? y
Closing threads… Done.

After upgrading to Matplotlib 0.99:

leopardi@…3314…:~/src/Working/Working-0.5.1/glucat/pyclical> rpm -q -a |
grep matplotlib | sort
python-matplotlib-1.0.0-9.2.x86_64
python-matplotlib-tk-1.0.0-9.2.x86_64
python-matplotlib-wx-1.0.0-9.2.x86_64

leopardi@…3314…:~/src/Working/Working-0.5.1/glucat/pyclical> ipython
-pylab
Python 2.6.2 (r262:71600, Jun 17 2010, 13:37:45)
Type “copyright”, “credits” or “license” for more information.

IPython 0.10 – 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.

Welcome to pylab, a matplotlib-based Python environment.
For more information, type ‘help(pylab)’.

In [1]: from mpl_toolkits.mplot3d import Axes3D

In [2]: import matplotlib.pyplot as plt

In [3]: fig=plt.figure()

In [4]: ax=Axes3D(fig)

In [5]: plt.show()
^CERROR: An unexpected error occurred while tokenizing input
The following traceback may be corrupted or invalid
The error message is: (‘EOF in multi-line statement’, (206, 0))

KeyboardInterrupt Traceback (most recent call last)

/home/leopardi/src/Working/Working-0.5.1/glucat/pyclical/
in

()

/usr/lib64/python2.6/site-packages/matplotlib/backends/backend_tkagg.pyc in
show()
72 for manager in Gcf.get_all_fig_managers():
73 manager.show()
—> 74 Tk.mainloop()
75
76 def new_figure_manager(num, *args, **kwargs):

/usr/lib64/python2.6/lib-tk/Tkinter.pyc in mainloop(n)
323 def mainloop(n=0):
324 “”“Run the main loop of Tcl.”“”
→ 325 _default_root.tk.mainloop(n)
326
327 getint = int

KeyboardInterrupt:

In [6]:
In [6]: quit()
Do you really want to exit ([y]/n)? y

I believe this was a known issue that came about from some fixes made to the
behavior of show() for the 1.0 release. It was patched shortly thereafter
and the maintenance branch was also patched. As a workaround, I believe you
can try one of the other backends or install matplotlib from source.
Does anybody know who maintains the packages for OpenSUSE? It would
probably be prudent to poke them to update.
Ben Root

Beautiful is writing same markup. Internet Explorer 9 supports
standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 & L3.
Spend less time writing and rewriting code and more time creating great
experiences on the web. Be a part of the beta today.
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View this message in context: Re: Confirming problem with matplotlib.pyplot.show()

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5

What was the error message? The message in your email was garbled.

Ben Root

···

On Thursday, October 28, 2010, Pradyumna <pvd103@...211...> wrote:

Hello All,

I am running into same issue except mine won't go away even when I went back to matplotlib 0.99.

Also, something curious I noticed - when I run the examples, I don't get this error message.

Please let me know if you have any suggestions.

Thanks!
Pradyumna

Benjamin Root-2 wrote:

On Sat, Oct 9, 2010 at 7:41 AM, Paul Leopardi wrote:

On Saturday 09 October 2010 22:58:04 Paul Leopardi wrote:
> Hello all
> I am seeing a problem similar to that seen by Jorge Scandaliaris.

I downgraded from matplotlib 1.0.0 to matplotlib 0.99 and my original
problem
no longer appears:

leopardi@...3314...:~/src/Working/Working-0.5.1/glucat/pyclical> rpm -q -a |
grep matplotlib | sort
python-matplotlib-0.99.1.1-0.pm.1.8.x86_64
leopardi@...3314...:~/src/Working/Working-0.5.1/glucat/pyclical> ipython
-pylab
Your PyGtk has set_interactive(), so you can use the
more stable single-threaded Gtk mode.
See Bug #270856 “IPython hangs with PyGTK” : Bugs : IPython
Python 2.6.2 (r262:71600, Jun 17 2010, 13:37:45)
Type "copyright", "credits" or "license" for more information.

IPython 0.10 -- 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.

Welcome to pylab, a matplotlib-based Python environment.
For more information, type 'help(pylab)'.

In [1]: from mpl_toolkits.mplot3d import Axes3D

In [2]: import matplotlib.pyplot as plt

In [3]: fig=plt.figure()
/usr/lib64/python2.6/site-packages/matplotlib/backends/backend_gtk.py:621:
DeprecationWarning: Use the new widget gtk.Tooltip
self.tooltips = gtk.Tooltips()

In [4]: ax=Axes3D(fig)

In [5]: plt.show()

In [6]: quit()
Do you really want to exit ([y]/n)? y
Closing threads... Done.

After upgrading to Matplotlib 0.99:

leopardi@...3314...:~/src/Working/Working-0.5.1/glucat/pyclical> rpm -q -a |
grep matplotlib | sort
python-matplotlib-1.0.0-9.2.x86_64
python-matplotlib-tk-1.0.0-9.2.x86_64
python-matplotlib-wx-1.0.0-9.2.x86_64

leopardi@...3314...:~/src/Working/Working-0.5.1/glucat/pyclical> ipython
-pylab
Python 2.6.2 (r262:71600, Jun 17 2010, 13:37:45)
Type "copyright", "credits" or "license" for more information.

IPython 0.10 -- 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.

Welcome to pylab, a matplotlib-based Python environment.
For more information, type 'help(pylab)'.

In [1]: from mpl_toolkits.mplot3d import Axes3D

In [2]: import matplotlib.pyplot as plt

In [3]: fig=plt.figure()

In [4]: ax=Axes3D(fig)

In [5]: plt.show()
^CERROR: An unexpected error occurred while tokenizing input
The following traceback may be corrupted or invalid
The error message is: ('EOF in multi-line statement', (206, 0))

---------------------------------------------------------------------------
KeyboardInterrupt Traceback (most recent call last)

/home/leopardi/src/Working/Working-0.5.1/glucat/pyclical/
in
()

/usr/lib64/python2.6/site-packages/matplotlib/backends/backend_tkagg.pyc in
show()
    72 for manager in Gcf.get_all_fig_managers():
    73 manager.show()
---> 74 Tk.mainloop()
    75
    76 def new_figure_manager(num, *args, **kwargs):

/usr/lib64/python2.6/lib-tk/Tkinter.pyc in mainloop(n)
   323 def mainloop(n=0):
   324 """Run the main loop of Tcl."""
--> 325 _default_root.tk.mainloop(n)
   326
   327 getint = int

KeyboardInterrupt:

In [6]:
In [6]: quit()
Do you really want to exit ([y]/n)? y

I believe this was a known issue that came about from some fixes made to the
behavior of show() for the 1.0 release. It was patched shortly thereafter
and the maintenance branch was also patched. As a workaround, I believe you
can try one of the other backends or install matplotlib from source.

Does anybody know who maintains the packages for OpenSUSE? It would
probably be prudent to poke them to update.

Ben Root

------------------------------------------------------------------------------
Beautiful is writing same markup. Internet Explorer 9 supports
standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 & L3.
Spend less time writing and rewriting code and more time creating great
experiences on the web. Be a part of the beta today.
http://p.sf.net/sfu/beautyoftheweb
_______________________________________________
Matplotlib-users mailing list
Matplotlib-users@lists.sourceforge.net
matplotlib-users List Signup and Options

View this message in context: Re: Confirming problem with matplotlib.pyplot.show() <http://old.nabble.com/Confirming-problem-with-matplotlib.pyplot.show()-tp29922229p30080049.html&gt;
Sent from the matplotlib - users mailing list archive <http://old.nabble.com/matplotlib---users-f2906.html&gt; at Nabble.com.