[Gnuplot-py-users] Re: Problems running Gnuplot.py (1.6) on a Win2k PC

Hello Micheal,

thanks for the quick answer and pointing me to the gnuplot-py-user list.
I somehow failed to notice there is one.

Michael Haggerty wrote:
> Lothar,
> 
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> 
> Lothar Birk <bi...@en...> writes:
> 
>>Dear Michael,
>>
>>first of all, thank your for your great tool which is very useful to
>>me creating plots on the fly for my lectures and papers.
>>
>>I recently had to move to an Win2k PC :-( and try to get some of my
>>Python scripts running there,
>>In all my scripts using Gnuplot I run into the following error message.
>>
>>Traceback (most recent call last):
>>   File "C:\Home\birk\src\pyprop\b-series\TESTBS~1.PY", line 46, in ?
>>     PDlist=[0.5,0.6,0.8,1.0,1.2,1.4])
>>   File "C:\Home\birk\src\pyprop\b-series\propseries.py", line 269, in 
>>plotKTKQ
>>     g.additem('set xrange [%f:%f]' % (Jmin,Jmax))
>>   File "C:\Home\birk\src\pyprop\b-series\IncrGnuplot.py", line 173, in 
>>additem
>>     self.__call__(plotitem)
>>   File "C:\program 
>>files\python22\Lib\site-packages\Gnuplot\_Gnuplot.py", line 206, in __call__
>>     self.gnuplot(s)
>>   File "C:\PROGRA~1\python22\lib\site-packages\Gnuplot\gp_win32.py", 
>>line 121, in __call__
>>     self.write(s + '\n')
>>IOError: [Errno 22] Invalid argument
>>
>>The weird thing is that it does not happen at the same place in the
>>script at different runs from a command terminal. May be this error
>>is not a Gnuplot.py issue at all, but related to system or python 
>>installation. I hope, however, you can provide me with hints where to look.
>>
>>I have python-2.2.1, gnuplot-py-1.6.1, Numeric-21.3 and a lot of
>>other stuff which runs as far as I know.
>>
>>Best regards
>>Lothar
> 
> 
> I don't think there's ever been a version 1.6.1 of Gnuplot.py
> released.  Are you using 1.6 or a more recent CVS version or ...?

OK it is the plain 1.6 distribution. I got confused by the numbering
of the rpms on sourceforge (1.6-1)

> 
> It looks like you are using a home-cooked extension to Gnuplot.py, so
> I could only guess what your problem might be.  Possibly the argument
> that you are passing to gnuplot.__call__ is not a sensible string as
> it should be.
> 
Yes it is a crooked extension, which maintains a list of all gnuplot
commands and allows you to build up a plot command by adding more and
more curves which finally get plotted into one diagrams.

However the error also occurs when I try to run the Gnuplot.py
demo:

C:\Program Files\python22\Lib\site-packages\Gnuplot>python demo.py
gnuplot> set title "A simple example"
gnuplot> set data style linespoints
gnuplot> plot 'C:\DOCUME~1\birk\LOCALS~1\Temp\~1200-0' notitle
Please press return to continue...

Traceback (most recent call last):
   File "demo.py", line 121, in ?
     demo()
   File "demo.py", line 47, in demo
     g.reset()
   File "C:\program 
files\python22\Lib\site-packages\Gnuplot\_Gnuplot.py", line 3
62, in reset
     self('reset')
   File "C:\program 
files\python22\Lib\site-packages\Gnuplot\_Gnuplot.py", line 2
06, in __call__
     self.gnuplot(s)
   File "C:\PROGRA~1\python22\lib\site-packages\Gnuplot\gp_win32.py", 
line 121, i
n __call__
     self.write(s + '\n')
IOError: [Errno 22] Invalid argument

> If you send us more information we might be able to help you.
> 
> Michael
> 
> --
> Michael Haggerty
> hag...@jp...
> 
Any help appreciated
Lothar
-- 
-- Lothar Birk -------------------------------------------------------
Visiting Professor, Dept. of Naval Architecture and Marine Engineering
University of Michigan
Phone +1 734 615 8061, Fax +1 734 936 8820, E-mail bi...@um...