[Gnuplot-py-users] Running Gnuplot.py in IDLE

[Samuel H. D. Jr. <sd...@sp...>]

Greetings,

I'm attempting to run Gnuplot in Python under IDLE. I'm running Python 
version. 2.5 on a Power Mac G4 under Mac OS X, version 10.4.11. I've 
installed Gnuplot-py version 1.8 and I have Gnuplot version 4.2.

I have Gnuplot defaulted to display plots using AquaTerm.app version 
1.0.1. This has been working fine. When I run the following Python code 
in a terminal window

                #example_gnuplot.py

                from numpy import *
                import Gnuplot, Gnuplot.funcutils

                def f(t):
                    return t**2*exp(-t**2)

                g = Gnuplot.Gnuplot(debug=1)

                t = linspace(0, 3, 51)    # 51 points between 0 and 3
                y = zeros(len(t))         # allocate y with float elements
                for i in xrange(len(t)):
                    y[i] = f(t[i])

                g.plot(t, y)*

                *

produces the desired plot with the following listing:

            dsl092-239-159:~/python programs samueldupree$ python
            example_gnuplot.py
            gnuplot> set terminal aqua
            gnuplot> plot "/tmp/tmpytUeOa.gnuplot/fifo" notitle,
            "/tmp/tmp-7QSsP.gnuplot/fifo" notitle
            2009-08-08 05:07:28.182 gnuplot[1510]
            libaquaterm::Warning: Logging at level 4
            2009-08-08 05:07:28.184 gnuplot[1510]
            libaquaterm::Launching server...
            2009-08-08 05:07:28.564 gnuplot[1510]
            libaquaterm::LSOpenCFURLRef = 0
            2009-08-08 05:07:28.573 gnuplot[1510]
            libaquaterm::Waiting... 9
            2009-08-08 05:07:29.585 gnuplot[1510]
            libaquaterm::Server version 1.0.1
            2009-08-08 05:07:29.586 gnuplot[1510]
            libaquaterm::Connected!
            2009-08-08 05:07:29.755 gnuplot[1510]
            libaquaterm::Active plot: 0
            dsl092-239-159:~/python programs samueldupree$

However, when I attempt to run this program under IDLE, I get no plot 
whatsoever and IDLE produces the following report:

Python 2.5 (r25:51918, Sep 19 2006, 08:49:13)
[GCC 4.0.1 (Apple Computer, Inc. build 5341)] on darwin
Type "copyright", "credits" or "license()" for more information.

    ****************************************************************
    Personal firewall software may warn about the connection IDLE
    makes to its subprocess using this computer's internal loopback
    interface.  This connection is not visible on any external
    interface and no data is sent to or received from the Internet.
    ****************************************************************
   
IDLE 1.2     
 >>> ================================ RESTART 
================================
 >>>
gnuplot> set terminal aqua

Traceback (most recent call last):
  File "/Users/samueldupree/python programs/example_gnuplot.py", line 
16, in <module>
    g.plot(t, y)
  File 
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/Gnuplot/_Gnuplot.py", 
line 285, in plot
    self.refresh()
  File 
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/Gnuplot/_Gnuplot.py", 
line 226, in refresh
    self(self.plotcmd + ' ' + string.join(plotcmds, ', '))
  File 
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/Gnuplot/_Gnuplot.py", 
line 210, in __call__
    self.gnuplot(s)
  File 
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/Gnuplot/gp_macosx.py", 
line 144, in __call__
    self.flush()
IOError: [Errno 32] Broken pipe
 >>>

My questions for the list are:

   1. What am I doing wrong?
   2. What path variables of parameters do I need to set?
   3. Why does my program work when running in a terminal window as
      opposed to running under IDLE?


Sam Dupree.