Re: math - need divisors algorithm
Philp Smith wrote: > Hi > > Does anyone have suggested code for a compact, efficient, elegant, most of > all pythonic routine to produce a list of all the proper divisors of an > integer (given a list of prime factors/powers) Is this compact enough? :-) def properDivisors(N): return [x for x in range(1,N-2) if not divmod(N,x)[1]] --- Ed Suominen Registered Patent Agent Open-Source Software Author (yes, both...) Web Site: http://www.eepatents.com -- http://mail.python.org/mailman/listinfo/python-list
Re: Nevow examples
Travis, that's a very nice use of Nevow. I'm going to look into using it for documenting my own stuff. Here's another example, my boss's web site, which uses Twisted/Nevow to implement virtual hosting, dynamic image generation with caching, dynamically-updated parsing of a site-wide config file that determines almost all the layout you see, and dynamic mark-up generation with restructured-text parsing of plain text source files. http://valuablepatents.com A static vhost run under the same Twisted/Nevow server is at http://eepatents.com. I make new servers by simply adding a DNS entry in BIND and then making a new directory in /var/www/ with a site.conf file in it if it's dynamic, or just with static files if it's static, or with a side.mod file if it the vhost's root resource is generated from a named module imported from /var/www/_modules/. I will be providing a release and possibly read-only public access to the SVN repository for the underlying code soon. It will be distributed under the LGPL. --- Ed Suominen Registered Patent Agent Open-Source Software Author (yes, both...) Web Site: http://www.eepatents.com Travis Oliphant wrote: > > There was a request for nevow examples. Nevow is a fantastic > web-development framework for Python. > > I used nevow to create http://www.scipy.org/livedocs/ > > This site uses nevow and self introspection to produce (live) > documentation for scipy based on the internal docstrings. It would be > nice to add the capability for users to update the documentation through > the web-site. But, that functionality is not complete. > > The code itself is available in the util directory of scipy which can be > checked out of CVS (or browsed). Go to http://www.scipy.org for mor > details. > > -Travis Oliphant -- http://mail.python.org/mailman/listinfo/python-list
Re: Scan document pages to a compressed PDF
Replying to my own post, this looks like a very promising tool: "Pytiff is a library for using TIFF files and advanced imaging in Python." http://pubweb.northwestern.edu/~omh221/software_projects/pytiff/pytiff.html Ed Suominen wrote: > I'd like to write a Python-based commandline tool that will scan pages > with SANE, applying CCITT Group 4 compression during scanning, and produce > a single PDF file. I would release it under GPL. Right now, I'm relying on > a workable but inflexible shell script that pipes stuff between scanimage, > tiffcp, tiff2ps, and ps2pdf. > > What's the best way currently to do CCITT4 compression (e.g., of > intermediate TIFF-format images) from Python? PIL doesn't seem to support > CCITT4 compression, and the read-only patch [1] that's available won't > help in my case. I'd like to incorporate as much as possible into the > Python code and imported packages, rather than relying on pipes to a bunch > of external programs. > > Same question regarding SANE -- I can't seem to find the supposed PIL > support for SANE in the release on my system. Anyone know about that, or > alternatives? > > --- > Ed Suominen > Registered Patent Agent > Open-Source Software Author (yes, both...) > Web Site: http://www.eepatents.com > > [1] http://mail.python.org/pipermail/image-sig/2003-July/002354.html -- http://mail.python.org/mailman/listinfo/python-list
Scan document pages to a compressed PDF
I'd like to write a Python-based commandline tool that will scan pages with SANE, applying CCITT Group 4 compression during scanning, and produce a single PDF file. I would release it under GPL. Right now, I'm relying on a workable but inflexible shell script that pipes stuff between scanimage, tiffcp, tiff2ps, and ps2pdf. What's the best way currently to do CCITT4 compression (e.g., of intermediate TIFF-format images) from Python? PIL doesn't seem to support CCITT4 compression, and the read-only patch [1] that's available won't help in my case. I'd like to incorporate as much as possible into the Python code and imported packages, rather than relying on pipes to a bunch of external programs. Same question regarding SANE -- I can't seem to find the supposed PIL support for SANE in the release on my system. Anyone know about that, or alternatives? --- Ed Suominen Registered Patent Agent Open-Source Software Author (yes, both...) Web Site: http://www.eepatents.com [1] http://mail.python.org/pipermail/image-sig/2003-July/002354.html -- http://mail.python.org/mailman/listinfo/python-list
