Re: [Matplotlib-users] OSError when exporting figure in EPS

[massimo s. <mas...@un...>]

Fernando Perez ha scritto:
> This shows the benefits of 'xmode verbose' :) There's enough info in
> that traceback to understand the problem:

> This is the call that fails.  To confirm this is  the problem, try:
> 
> shutil.move('/tmp/foo','/fat32partition/foo')
> With any valid /tmp/foo file and your actual path to your fat32
> partition.  

Yes, it fails in the same way:

In [5]: xmode verbose
Exception reporting mode: Verbose

In [6]: shutil.move('/tmp/tmp_Tzxny','/users/Massimo/')
---------------------------------------------------------------------------
exceptions.OSError                                   Traceback (most 
recent call last)

/home/massimo/<ipython console>

/usr/lib/python2.4/shutil.py in move(src='/tmp/tmp_Tzxny', 
dst='/users/Massimo/')
     191             rmtree(src)
     192         else:
--> 193             copy2(src,dst)
         global copy2 = <function copy2 at 0xb7d8bb1c>
         src = '/tmp/tmp_Tzxny'
         dst = '/users/Massimo/'
     194             os.unlink(src)
     195

/usr/lib/python2.4/shutil.py in copy2(src='/tmp/tmp_Tzxny', 
dst='/users/Massimo/tmp_Tzxny')
      91         dst = os.path.join(dst, os.path.basename(src))
      92     copyfile(src, dst)
---> 93     copystat(src, dst)
         global copystat = <function copystat at 0xb7d8baac>
         src = '/tmp/tmp_Tzxny'
         dst = '/users/Massimo/tmp_Tzxny'
      94
      95

/usr/lib/python2.4/shutil.py in copystat(src='/tmp/tmp_Tzxny', 
dst='/users/Massimo/tmp_Tzxny')
      66     mode = stat.S_IMODE(st.st_mode)
      67     if hasattr(os, 'utime'):
---> 68         os.utime(dst, (st.st_atime, st.st_mtime))
         global os.utime = <built-in function utime>
         dst = '/users/Massimo/tmp_Tzxny'
         st.st_atime = 1150188691
         st.st_mtime = 1149762561
      69     if hasattr(os, 'chmod'):
      70         os.chmod(dst, mode)

OSError: [Errno 1] Operation not permitted: '/users/Massimo/tmp_Tzxny'


> which in turn tries to call utime():
> 
>> /usr/lib/python2.4/shutil.py in
>> copystat(src='/tmp/caba709a5ee736ae3148af077a1a9a38', dst='prova.eps')
>>       66     mode = stat.S_IMODE(st.st_mode)
>>       67     if hasattr(os, 'utime'):
>> ---> 68         os.utime(dst, (st.st_atime, st.st_mtime))
>>          global os.utime = <built-in function utime>
>>          dst = 'prova.eps'
>>          st.st_atime = 1150101622
>>          st.st_mtime = 1150101622
>>       69     if hasattr(os, 'chmod'):
>>       70         os.chmod(dst, mode)
>>
>> OSError: [Errno 1] Operation not permitted: 'prova.eps'
> 
> is somehow not OK for fat32 partitions, or because you don't have the
> right permissions on your system.
 > You need to be sure that you have your fat32 partition mounted with
 > the right user permissions, otherwise things like these can fail.

My /etc/mtab line for the partition is as follows:
/dev/hda7 /users vfat rw,utf8,umask=000,gid=46 0 0

this should mean everyone has full permissions on the partition, isn't it?

> At this point, it's not yet clear if this is a problem with backend_ps
> in mpl or your permissions configuration.

5-minute googling lets me wonder if it's a problem with os.utime() not 
always playing nice with fat32 partitions... odd because on my previous 
debian sarge with the same configuration, it didn't complain.

m.

-- 
Massimo Sandal
University of Bologna
Department of Biochemistry "G.Moruzzi"

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