Sammo
asked on
"No module named Image" CGI error
Hi there,
I'm trying to get some code going on my website to dynamically generate images with Python.
I have SSHed into my server and when I run Python from the command line I get no problems at all when I do:
"import Image"
However, the following code:
#!/usr/bin/env python
print "Content-type: image/png"
print "Status: 200 Ok"
import Image, ImageDraw
im = Image.new("RGB", (40, 15), 'white')
draw = ImageDraw.Draw(im)
draw.line((0, 0) + im.size, fill="red")
draw.line((0, im.size[1], im.size[0], 0), fill="red")
del draw
im.save(sys.stdout, "PNG")
gives an error 500, and in my logs shows up as:
[Sun Apr 23 13:30:10 2006] [error] [client x.x.x.x] PythonHandler mod_python.cgihandler: ImportError: No module named Image
Any ideas what I'm doing wrong?
Sam
I'm trying to get some code going on my website to dynamically generate images with Python.
I have SSHed into my server and when I run Python from the command line I get no problems at all when I do:
"import Image"
However, the following code:
#!/usr/bin/env python
print "Content-type: image/png"
print "Status: 200 Ok"
import Image, ImageDraw
im = Image.new("RGB", (40, 15), 'white')
draw = ImageDraw.Draw(im)
draw.line((0, 0) + im.size, fill="red")
draw.line((0, im.size[1], im.size[0], 0), fill="red")
del draw
im.save(sys.stdout, "PNG")
gives an error 500, and in my logs shows up as:
[Sun Apr 23 13:30:10 2006] [error] [client x.x.x.x] PythonHandler mod_python.cgihandler: ImportError: No module named Image
Any ideas what I'm doing wrong?
Sam
Of course, I meant "The PYTHONPATH environment variable tells Python where to look for modules."
ASKER
Hmm,
I did a bit of digging around, I printed out my pythonpath variable and it seemed correct as it was:
['(\\.py$)/', '/usr/lib/python23.zip', '/usr/lib/python2.3', '/usr/lib/python2.3/plat-l
You can see that PIL is already there.
I did manage to solve the problem though, it seems that Image wouldn't import correctly unless I imported the sys and os modules first. I've written a lot of python but this is the first time I've dabbled with CGI.
I did a bit of digging around, I printed out my pythonpath variable and it seemed correct as it was:
['(\\.py$)/', '/usr/lib/python23.zip', '/usr/lib/python2.3', '/usr/lib/python2.3/plat-l
You can see that PIL is already there.
I did manage to solve the problem though, it seems that Image wouldn't import correctly unless I imported the sys and os modules first. I've written a lot of python but this is the first time I've dabbled with CGI.
ASKER CERTIFIED SOLUTION
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There are lots of ways you could fix it; unfortunately, I don't know what is standard. You can customize the Python installation so it always looks in the directory where the Image module is, or you could possibly configure the web server so that when it runs the script, it has the right directory in its PYTHONPATH variable. Or you could change the module search path within your script. Or you could put the Image module in the same directory as the CGI script. Or possibly you could set the PYTHONPATH in the shell initialization script for the user identity the web server uses to run the script.
I think the way I have avoided this problem in my limited Python CGI experience is to have all the non-built-in modules in the CGI directory.