Re: [Matplotlib-users] Iteration problem with plot_date

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

>>>>> "H=E9ctor" =3D=3D H=E9ctor Villafuerte D <hec...@te...=
m.gt> writes:
    H=E9ctor> savefig("c:\\tmp\\%s_%s" % (tel,table)) File
    H=E9ctor> "C:\Python23\Lib\site-packages\matplotlib\matlab.py", line
    H=E9ctor> 1115, in savefig manager.canvas.print_figure(*args,
    H=E9ctor> **kwargs) File
    H=E9ctor> "C:\Python23\Lib\site-packages\matplotlib\backends\backend_=
agg.py",
    H=E9ctor> line 419, in print_figure
    H=E9ctor> self.renderer._renderer.write_png(filename) IOError: could
    H=E9ctor> not open file

This is a new one; I think the file is not writable and it is not a
matplotlib problem per se.  Is it possible that C:\\tmp does not
exist?

You may want to try something along the lines of

import os

...snip...
dirname =3D 'c:\\tmp'
fname =3D os.path.join(dirname, '%s_%s' % (tel,table))
print 'dir exists', os.path.exists(dirname)
print 'filename', fname

file(fname, 'w').write('test\n')

and see if you can see what is going wrong.

JDH