Matplotlib и Pylab не работят в Python CGI. Но същата комбинация работи в обвивката на Python. Следва кодът:
#!C:/Python26/python
import cgi
import cgitb
import sys
import os
cgitb.enable()
# set HOME environment variable to a directory the httpd server can write to
os.environ[ 'HOME' ] = '/tmp/'
import matplotlib
# chose a non-GUI backend
matplotlib.use( 'Agg' )
import pylab
#Deals with inputing data into python from the html form
form = cgi.FieldStorage()
# construct your plot
pylab.plot([1,2,3])
print "Content-Type: image/png\n"
# save the plot as a png and output directly to webserver
pylab.savefig( "test.png")