[Zope] How to get python error output? (PIL)
tilo.schwarz@daimlerchrysler.com
tilo.schwarz@daimlerchrysler.com
Mon, 15 Jan 2001 17:21:39 +0100
Hi Zopians out there,
thanks for helping me with my last question - here is a new one ;-)
We do image-processing of traffic-video-sequences and I'd like to serve
thumbnails use the following code (originally from some HOW-TO) as external
method:
import os, os.path, Image
def get_image(self, imagename, thumb, REQUEST, RESPONSE):
"""
Read and return an external file with appropriate response set.
Returns the contents of the file or image. Also, sets the
Content-Type HTTP header to the objects content type.
"""
thumbname = os.path.join('/tmp', 'thumbs', imagename)
imagename = os.path.join('/tmp', 'images', imagename)
print 'i:', imagename
print 't:', thumbname
if not os.path.exists(imagename):
return ""
if thumb == '1':
print 'inner'
if not os.path.exists(thumbname):
print 'inner2'
#img = Image.open(imagename) <-- if I remove the comment, the
'inner2' is still printed, but the 'after open' in the next line is not printed
in the logfile anymore
print 'after open',img, type(img),'di'
img.thumbnail((100,50))
print img.size
img.save(thumbname)
print 'later'
imagename = thumbname
fptr=open(imagename, "rb")
data=fptr.read()
size=len(data)
fptr.close()
RESPONSE.setHeader("Content-Type", "image/png")
RESPONSE.setHeader("Content-Length", size)
return data
My questions are:
- Does anybody have a clue, why the 'after open' and the next two prints are
not printed in the log file (I thing /var/log/zope) when I uncomment the line
above?
- If it is some error within python and/or the PIL, how do I get the error
output out of zope (I couldn't find this in the docu yet). The strange thing
is, the request is served, but the lines
print 'after open',img, type(img),'di'
img.thumbnail((100,50))
print img.size
img.save(thumbname)
print 'later'
seem to be simply ignored when uncommenting the "img = Image.open(..." line.
BTW, I can execute the PIL-commands in the normal python-shell without any
problems.
Thanks for any hint.
Tilo Schwarz
-----------------------------------------------------------------
DaimlerChrysler AG, Research & Technology
Image Understanding FT3/AB
Dr. Tilo Schwarz
Email: tilo.schwarz@daimlerchrysler.com
Tel: +49-731-505-2376
Fax: +49-731-505-4105
P.O.Box 2360, 89013 Ulm, Germany