gnuplot-py-users

[Gnuplot-py-users] No Gnuplot.funcutils

[Roger F. <rf...@cy...>]

I can't get started with version 1.7 on Windows XP Professional
I am using the following packages:
  Python-2.3.2-1.exe
  win32all-157.exe
  Numeric-23.1.win32-py2.3.exe
  gp373w32.zip
  gnuplot-py-1.7.zip

Here is a transcript of my attempt to run the demo from the Command Line:
---------------------------------------------------
 >C:\Python23\python demo.py
gnuplot> set terminal windows
gnuplot> set title "A simple example"
gnuplot> set data style linespoints
gnuplot> plot 'c:\docume~1\rogerf~1\locals~1\temp\tmphzycgx' notitle
Please press return to continue...

Traceback (most recent call last):
  File "demo.py", line 113, in ?
    demo()
  File "demo.py", line 39, in demo
    g.reset()
  File "C:\Python23\Lib\site-packages\Gnuplot\_Gnuplot.py", line 355, in 
reset
    self('reset')
  File "C:\Python23\Lib\site-packages\Gnuplot\_Gnuplot.py", line 199, in 
__call_
_
    self.gnuplot(s)
  File "C:\Python23\Lib\site-packages\Gnuplot\gp_win32.py", line 125, in 
__call_
_
    self.write(s + '\n')
IOError: [Errno 22] Invalid argument
--------------------------------------------------

Here is a transcript of my attempt to run the demo from PythonWin
-----------------------------------------------------
PythonWin 2.3.2 (#49, Oct  2 2003, 20:02:00) [MSC v.1200 32 bit (Intel)] 
on win32.
Portions Copyright 1994-2001 Mark Hammond (mha...@sk...) - 
see 'Help/About PythonWin' for further copyright information.
 >>> import Gnuplot
 >>> dir(Gnuplot)
['Data', 'DataError', 'Error', 'Errors', 'File', 'Func', 'Gnuplot', 
'GnuplotOpts', 'GnuplotProcess', 'GridData', 'OptionError', 'PlotItem', 
'PlotItems', '_Gnuplot', '__all__', '__builtins__', '__cvs_version__', 
'__doc__', '__file__', '__name__', '__path__', '__version__', 'gp', 
'gp_win32', 'termdefs', 'test_persist', 'utils']
 >>> Gnuplot.GnuplotOpts.gnuplot_command
'C:\\Program Files\\gp373w32\\pgnuplot.exe'
 >>> import demo
Traceback (most recent call last):
  File "<interactive input>", line 1, in ?
  File "C:\Python23\Lib\site-packages\Gnuplot\demo.py", line 22, in ?
    import Gnuplot, Gnuplot.funcutils
ImportError: No module named funcutils
 >>> import Gnuplot.funcutils
Traceback (most recent call last):
  File "<interactive input>", line 1, in ?
ImportError: No module named funcutils
 >>>
-----------------------------------------------------

-Roger

Re: [Gnuplot-py-users] No Gnuplot.funcutils

[<kai...@t-...>]

Can any Windows users help?

The problem reported below seems to be pretty common among Windows 
users.  I believe it is caused by Gnuplot.py not being able to find the 
pgnuplot.exe executable because it is not in the PATH or not installed. 
 Are there any Windows users of Gnuplot.py who can come up with a way to 
diagnose the problem within the Gnuplot.py package so that users are not 
confronted with such a strange error message?  It might help people 
recognize and fix the problem on their own.

For example, is there a way to tell if a call to popen() fails under 
Windows?  Ideally, it should work for the old python versions, too, 
where win32pipe.popen() as well as the new versions where os.popen() is 
used.  But even a partial solution would be an improvement.

Ideally, there would be a test in the gp_win32.GnuplotProcess 
constructor which generated a more descriptive exception in the case of 
errors.

Otherwise, I guess I have to add a FAQ.txt question about this issue.

Thanks,
Michael

Roger Frye wrote:

> I can't get started with version 1.7 on Windows XP Professional
> I am using the following packages:
>  Python-2.3.2-1.exe
>  win32all-157.exe
>  Numeric-23.1.win32-py2.3.exe
>  gp373w32.zip
>  gnuplot-py-1.7.zip
>
> Here is a transcript of my attempt to run the demo from the Command Line:
> ---------------------------------------------------
> >C:\Python23\python demo.py
> gnuplot> set terminal windows
> gnuplot> set title "A simple example"
> gnuplot> set data style linespoints
> gnuplot> plot 'c:\docume~1\rogerf~1\locals~1\temp\tmphzycgx' notitle
> Please press return to continue...
>
> Traceback (most recent call last):
>  File "demo.py", line 113, in ?
>    demo()
>  File "demo.py", line 39, in demo
>    g.reset()
>  File "C:\Python23\Lib\site-packages\Gnuplot\_Gnuplot.py", line 355, 
> in reset
>    self('reset')
>  File "C:\Python23\Lib\site-packages\Gnuplot\_Gnuplot.py", line 199, 
> in __call_
> _
>    self.gnuplot(s)
>  File "C:\Python23\Lib\site-packages\Gnuplot\gp_win32.py", line 125, 
> in __call_
> _
>    self.write(s + '\n')
> IOError: [Errno 22] Invalid argument
> --------------------------------------------------



-- 
Michael Haggerty
mh...@al...

Re: [Gnuplot-py-users] No Gnuplot.funcutils

[Roger F. <rf...@cy...>]

Michael,

> The problem reported below seems to be pretty common among Windows 
> users.  I believe it is caused by Gnuplot.py not being able to find 
> the pgnuplot.exe executable because it is not in the PATH or not 
> installed.

It may be true that there is a problem in finding pgnuplot.exe, but 
there also seems to be a problem in the structure of Gnuplot.py because 
it does not seem to contain funcutils.

Here is the part of my original message the shows this problem:

> >>> import demo
> Traceback (most recent call last):
>  File "<interactive input>", line 1, in ?
>  File "C:\Python23\Lib\site-packages\Gnuplot\demo.py", line 22, in ?
>    import Gnuplot, Gnuplot.funcutils
> ImportError: No module named funcutils
> >>> import Gnuplot.funcutils
> Traceback (most recent call last):
>  File "<interactive input>", line 1, in ?
> ImportError: No module named funcutils 


-Roger

Re: [Gnuplot-py-users] No Gnuplot.funcutils

[Roger F. <rf...@cy...>]

> I can't get started with version 1.7 on Windows XP Professional 


Fixed.  I got Gnuplot-py working on Windows.
The fix is to put an extra set of quotes in the gnuplot_command if there 
is a space in the path:
gnuplot_command = r'"C:\Program Files\gp373w32\pgnuplot.exe"'

My assertion that Gnuplot.funcutils was missing was erroneous.  No excuse.

I also experimented with setting prefer_inline_data to 1, but I found 
that the demo failed to produce surface plots in this case.
-Roger