can't import _tkagg

I had to build matplotlib and many of its requirements in my home directory because I lack privileges to put stuff in /usr/local. So I build python-2.6.2, freetype-2.3.9, numpy-1.3.0, tcl-8.5.7, tk-8.5.7, and matplotlib-0.98.5.3. Each of those is in its own subdirectory in /home/gam/packages.

Since these packages are not in /usr/local, I had to alter pathways in certain cases in order to get stuff to build, link, and work together.

Things seem close to working, but matplotlib is unable to load a backend (_tkagg). Here’s what happens:

1655: python

Python 2.6.2 (r262:71600, Aug 5 2009, 09:48:28)

[GCC 3.4.6 20060404 (Red Hat 3.4.6-11)] on linux2

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

import matplotlib.pyplot

Traceback (most recent call last):

File “”, line 1, in

File “/home/gam/packages/Python-2.6.2/lib/python2.6/site-packages/matplotlib/pyplot.py”, line 75, in

new_figure_manager, draw_if_interactive, show = pylab_setup()

File “/home/gam/packages/Python-2.6.2/lib/python2.6/site-packages/matplotlib/backends/init.py”, line 25, in pylab_setup

globals(),locals(),[backend_name])

File “/home/gam/packages/Python-2.6.2/lib/python2.6/site-packages/matplotlib/backends/backend_tkagg.py”, line 8, in

import tkagg # Paint image to Tk photo blitter extension

File “/home/gam/packages/Python-2.6.2/lib/python2.6/site-packages/matplotlib/backends/tkagg.py”, line 1, in

import _tkagg

ImportError: libtk8.5.so: cannot open shared object file: No such file or directory

import sys

sys.path

[’’, ‘/home/gam/packages/Python-2.6.2/lib/python2.6/site-packages’, ‘/home/gam/packages/Python-2.6.2/lib/python26.zip’, ‘/home/gam/packages/Python-2.6.2/lib/python2.6’, ‘/home/gam/packages/Python-2.6.2/lib/python2.6/plat-linux2’, ‘/home/gam/packages/Python-2.6.2/lib/python2.6/lib-tk’, ‘/home/gam/packages/Python-2.6.2/lib/python2.6/lib-old’, ‘/home/gam/packages/Python-2.6.2/lib/python2.6/lib-dynload’, ‘/home/gam/.local/lib/python2.6/site-packages’]

If I understand correctly, _tkagg corresponds to _tkagg.so. Python ought to be able to load that object if it’s in python’s search path. The output above shows the presence of site_packages in sys.path, and that site-packages/matplotlib/backends/backend_tkagg.py does get loaded. _tkagg.so is in the same directory, as shown here:

1654: ls /home/gam/packages/Python-2.6.2/lib/python2.6/site-packages/matplotlib/backends

Matplotlib.nib backend_emf.py backend_gtkcairo.pyc backend_qt4.py backend_tkagg.pyc

init.py backend_emf.pyc backend_macosx.py backend_qt4.pyc backend_wx.py

init.pyc backend_fltkagg.py backend_macosx.pyc backend_qt4agg.py backend_wx.pyc

_backend_agg.so backend_fltkagg.pyc backend_mixed.py backend_qt4agg.pyc backend_wxagg.py

_tkagg.so backend_gdk.py backend_mixed.pyc backend_qtagg.py backend_wxagg.pyc

backend_agg.py backend_gdk.pyc backend_pdf.py backend_qtagg.pyc tkagg.py

backend_agg.pyc backend_gtk.py backend_pdf.pyc backend_svg.py tkagg.pyc

backend_cairo.py backend_gtk.pyc backend_ps.py backend_svg.pyc

backend_cairo.pyc backend_gtkagg.py backend_ps.pyc backend_template.py

backend_cocoaagg.py backend_gtkagg.pyc backend_qt.py backend_template.pyc

backend_cocoaagg.pyc backend_gtkcairo.py backend_qt.pyc backend_tkagg.py

I have tried clean rebuilds and reinstalls from the ground up but end with the same result.

Help!

Thanks.

Here’s information about my system and build:

1626: uname -a

Linux ccscs4.lanl.gov 2.6.9-67.0.7.ELsmp #1 SMP Wed Feb 27 04:48:20 EST 2008 i686 i686 i386 GNU/Linux

matplotlib version: 0.98.5.3

1630: diff setup.cfg setup.cfg.template

60c60

< #tkagg = True

···

#tkagg = False

76d75

< #backend = TkAgg

1631: diff setupext.py setupext.py.orig

50,51c50,51

< ‘linux2’ : [’/usr/local’, ‘/usr’, ‘/home/gam/packages’],

< ‘linux’ : [’/usr/local’, ‘/usr’, ‘/home/gam/packages’],


'linux2' : ['/usr/local', '/usr'],
'linux'  : ['/usr/local', '/usr',],

950,959c950,953

< #gam

< tcl_inc = “/home/gam/packages/tcl8.5.7/include”

< tcl_lib = “/home/gam/packages/tcl8.5.7/lib”

< tk_inc = “/home/gam/packages/tcl8.5.7/include”

< tk_lib = “/home/gam/packages/tcl8.5.7/lib”

< #tcl_inc = “/usr/local/include”

< #tk_inc = “/usr/local/include”

< #tcl_lib = “/usr/local/lib”

< #tk_lib = “/usr/local/lib”

< #mag


tcl_inc = "/usr/local/include"
tk_inc = "/usr/local/include"
tcl_lib = "/usr/local/lib"
tk_lib = "/usr/local/lib"

1063,1065d1056

< #gam

< tk_ver = tcl_ver = ‘8.5’

< #mag

1633: python setup.py build

============================================================================

BUILDING MATPLOTLIB

        matplotlib: 0.98.5.3

            python: 2.6.2 (r262:71600, Aug  5 2009, 09:48:28)  [GCC

                    3.4.6 20060404 (Red Hat 3.4.6-11)]

          platform: linux2

REQUIRED DEPENDENCIES

             numpy: 1.3.0

         freetype2: 9.7.3

OPTIONAL BACKEND DEPENDENCIES

            libpng: 1.2.7

           Tkinter: Tkinter: 70220, Tk: 8.5, Tcl: 8.5

                    * Guessing the library and include directories for

                    * Tcl and Tk because the tclConfig.sh and

                    * tkConfig.sh could not be found and/or parsed.

          wxPython: no

                    * wxPython not found

              Gtk+: no

                    * Building for Gtk+ requires pygtk; you must be able

                    * to "import gtk" in your build/install environment

   Mac OS X native: no

                Qt: no

               Qt4: no

             Cairo: no

OPTIONAL DATE/TIMEZONE DEPENDENCIES

          datetime: present, version unknown

          dateutil: matplotlib will provide

              pytz: 2008c

OPTIONAL USETEX DEPENDENCIES

            dvipng: no

       ghostscript: 7.07

             latex: 3.14159

           pdftops: 3.00

1634: gcc --version

gcc (GCC) 3.4.6 20060404 (Red Hat 3.4.6-11)

Copyright © 2006 Free Software Foundation, Inc.

This is free software; see the source for copying conditions. There is NO

warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

==========================

Graham Mark

CCS-3

Information Sciences

Los Alamos National Laboratory

505-667-8147

It appears to be importing _tkagg.so just fine, but it depends on Tcl/Tk itself, notably libtk8.5.so, which it can not find.

You can see what _tkagg.so depends on with ldd, eg.:

> ldd ~/usr/lib/python2.5/site-packages/matplotlib/backends/_tkagg.so
        libtk8.4.so => /usr/lib/libtk8.4.so (0x006c6000)
        libtcl8.4.so => /usr/lib/libtcl8.4.so (0x002ce000)
        libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x005b9000)
        libfreetype.so.6 => /home/mdroe/usr/lib/libfreetype.so.6 (0x00c92000)
        libz.so.1 => /usr/lib/libz.so.1 (0x00111000)
        libm.so.6 => /lib/tls/libm.so.6 (0x00a15000)
        libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x0046b000)
        libpthread.so.0 => /lib/tls/libpthread.so.0 (0x00121000)
        libc.so.6 => /lib/tls/libc.so.6 (0x00133000)
        libX11.so.6 => /usr/X11R6/lib/libX11.so.6 (0x00a7d000)
        libdl.so.2 => /lib/libdl.so.2 (0x00281000)
        /lib/ld-linux.so.2 (0x00bd1000)

You may need to add the path to your libtk8.5.so to your LD_LIBRARY_PATH (since you mention you built it yourself and put it in a custom location) and then run ldconfig to get the dynamic linker to find it.

Cheers,
Mike

Graham Mark wrote:

···

I had to build matplotlib and many of its requirements in my home directory because I lack privileges to put stuff in /usr/local. So I build python-2.6.2, freetype-2.3.9, numpy-1.3.0, tcl-8.5.7, tk-8.5.7, and matplotlib-0.98.5.3. Each of those is in its own subdirectory in /home/gam/packages.

Since these packages are not in /usr/local, I had to alter pathways in certain cases in order to get stuff to build, link, and work together.

Things seem close to working, but matplotlib is unable to load a backend (_tkagg). Here's what happens:

1655: python
Python 2.6.2 (r262:71600, Aug 5 2009, 09:48:28) [GCC 3.4.6 20060404 (Red Hat 3.4.6-11)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import matplotlib.pyplot
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/gam/packages/Python-2.6.2/lib/python2.6/site-packages/matplotlib/pyplot.py", line 75, in <module>
    new_figure_manager, draw_if_interactive, show = pylab_setup()
  File "/home/gam/packages/Python-2.6.2/lib/python2.6/site-packages/matplotlib/backends/__init__.py", line 25, in pylab_setup
    globals(),locals(),[backend_name])
  File "/home/gam/packages/Python-2.6.2/lib/python2.6/site-packages/matplotlib/backends/backend_tkagg.py", line 8, in <module>
    import tkagg # Paint image to Tk photo blitter extension
  File "/home/gam/packages/Python-2.6.2/lib/python2.6/site-packages/matplotlib/backends/tkagg.py", line 1, in <module>
    import _tkagg
ImportError: libtk8.5.so: cannot open shared object file: No such file or directory
>>> import sys
>>> sys.path
['', '/home/gam/packages/Python-2.6.2/lib/python2.6/site-packages', '/home/gam/packages/Python-2.6.2/lib/python26.zip', '/home/gam/packages/Python-2.6.2/lib/python2.6', '/home/gam/packages/Python-2.6.2/lib/python2.6/plat-linux2', '/home/gam/packages/Python-2.6.2/lib/python2.6/lib-tk', '/home/gam/packages/Python-2.6.2/lib/python2.6/lib-old', '/home/gam/packages/Python-2.6.2/lib/python2.6/lib-dynload', '/home/gam/.local/lib/python2.6/site-packages']
>>>

If I understand correctly, _tkagg corresponds to _tkagg.so. Python ought to be able to load that object if it's in python's search path. The output above shows the presence of site_packages in sys.path, and that site-packages/matplotlib/backends/backend_tkagg.py does get loaded. _tkagg.so is in the same directory, as shown here:

1654: ls /home/gam/packages/Python-2.6.2/lib/python2.6/site-packages/matplotlib/backends
Matplotlib.nib backend_emf.py backend_gtkcairo.pyc backend_qt4.py backend_tkagg.pyc
__init__.py backend_emf.pyc backend_macosx.py backend_qt4.pyc backend_wx.py
__init__.pyc backend_fltkagg.py backend_macosx.pyc backend_qt4agg.py backend_wx.pyc
_backend_agg.so backend_fltkagg.pyc backend_mixed.py backend_qt4agg.pyc backend_wxagg.py
_tkagg.so backend_gdk.py backend_mixed.pyc backend_qtagg.py backend_wxagg.pyc
backend_agg.py backend_gdk.pyc backend_pdf.py backend_qtagg.pyc tkagg.py
backend_agg.pyc backend_gtk.py backend_pdf.pyc backend_svg.py tkagg.pyc
backend_cairo.py backend_gtk.pyc backend_ps.py backend_svg.pyc
backend_cairo.pyc backend_gtkagg.py backend_ps.pyc backend_template.py
backend_cocoaagg.py backend_gtkagg.pyc backend_qt.py backend_template.pyc
backend_cocoaagg.pyc backend_gtkcairo.py backend_qt.pyc backend_tkagg.py

I have tried clean rebuilds and reinstalls from the ground up but end with the same result.

Help!

Thanks.

Here's information about my system and build:

1626: uname -a
Linux ccscs4.lanl.gov 2.6.9-67.0.7.ELsmp #1 SMP Wed Feb 27 04:48:20 EST 2008 i686 i686 i386 GNU/Linux

matplotlib version: 0.98.5.3

1630: diff setup.cfg setup.cfg.template 60c60
< #tkagg = True
---
> #tkagg = False
76d75
< #backend = TkAgg

1631: diff setupext.py setupext.py.orig 50,51c50,51
< 'linux2' : ['/usr/local', '/usr', '/home/gam/packages'],
< 'linux' : ['/usr/local', '/usr', '/home/gam/packages'],
---
> 'linux2' : ['/usr/local', '/usr'],
> 'linux' : ['/usr/local', '/usr',],
950,959c950,953
< #gam
< tcl_inc = "/home/gam/packages/tcl8.5.7/include"
< tcl_lib = "/home/gam/packages/tcl8.5.7/lib"
< tk_inc = "/home/gam/packages/tcl8.5.7/include"
< tk_lib = "/home/gam/packages/tcl8.5.7/lib" < #tcl_inc = "/usr/local/include"
< #tk_inc = "/usr/local/include"
< #tcl_lib = "/usr/local/lib"
< #tk_lib = "/usr/local/lib"
< #mag
---
> tcl_inc = "/usr/local/include"
> tk_inc = "/usr/local/include"
> tcl_lib = "/usr/local/lib"
> tk_lib = "/usr/local/lib"
1063,1065d1056
< #gam
< tk_ver = tcl_ver = '8.5'
< #mag

1633: python setup.py build ============================================================================
BUILDING MATPLOTLIB
            matplotlib: 0.98.5.3
                python: 2.6.2 (r262:71600, Aug 5 2009, 09:48:28) [GCC
                        3.4.6 20060404 (Red Hat 3.4.6-11)]
              platform: linux2

REQUIRED DEPENDENCIES
                 numpy: 1.3.0
             freetype2: 9.7.3

OPTIONAL BACKEND DEPENDENCIES
                libpng: 1.2.7
               Tkinter: Tkinter: 70220, Tk: 8.5, Tcl: 8.5
                        * Guessing the library and include directories for
                        * Tcl and Tk because the tclConfig.sh and
                        * tkConfig.sh could not be found and/or parsed.
              wxPython: no
                        * wxPython not found
                  Gtk+: no
                        * Building for Gtk+ requires pygtk; you must be able
                        * to "import gtk" in your build/install environment
       Mac OS X native: no
                    Qt: no
                   Qt4: no
                 Cairo: no

OPTIONAL DATE/TIMEZONE DEPENDENCIES
              datetime: present, version unknown
              dateutil: matplotlib will provide
                  pytz: 2008c

OPTIONAL USETEX DEPENDENCIES
                dvipng: no
           ghostscript: 7.07
                 latex: 3.14159
               pdftops: 3.00

1634: gcc --version
gcc (GCC) 3.4.6 20060404 (Red Hat 3.4.6-11)
Copyright (C) 2006 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

==========================

Graham Mark
CCS-3
Information Sciences
Los Alamos National Laboratory
505-667-8147

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Michael Droettboom
Science Software Branch
Operations and Engineering Division
Space Telescope Science Institute
Operated by AURA for NASA

Yeow! You're right, and thanks a bunch. I saw the line about libtk not being found, of course, but I thought it was a lie. Or at least a mistake.

Thanks again.

···

On Aug 6, 2009, at 10:04 AM, Michael Droettboom wrote:

It appears to be importing _tkagg.so just fine, but it depends on Tcl/Tk itself, notably libtk8.5.so, which it can not find.

You can see what _tkagg.so depends on with ldd, eg.:

> ldd ~/usr/lib/python2.5/site-packages/matplotlib/backends/_tkagg.so
      libtk8.4.so => /usr/lib/libtk8.4.so (0x006c6000)
      libtcl8.4.so => /usr/lib/libtcl8.4.so (0x002ce000)
      libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x005b9000)
      libfreetype.so.6 => /home/mdroe/usr/lib/libfreetype.so.6 (0x00c92000)
      libz.so.1 => /usr/lib/libz.so.1 (0x00111000)
      libm.so.6 => /lib/tls/libm.so.6 (0x00a15000)
      libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x0046b000)
      libpthread.so.0 => /lib/tls/libpthread.so.0 (0x00121000)
      libc.so.6 => /lib/tls/libc.so.6 (0x00133000)
      libX11.so.6 => /usr/X11R6/lib/libX11.so.6 (0x00a7d000)
      libdl.so.2 => /lib/libdl.so.2 (0x00281000)
      /lib/ld-linux.so.2 (0x00bd1000)

You may need to add the path to your libtk8.5.so to your LD_LIBRARY_PATH (since you mention you built it yourself and put it in a custom location) and then run ldconfig to get the dynamic linker to find it.

Cheers,
Mike

==========================

Graham Mark
CCS-3
Information Sciences
Los Alamos National Laboratory
505-667-8147