Thanks, guys, for the tips. Yes, that harrison.py script I grabbed is dated 1999(!), so no wonder it had some deprecated dependencies (Numeric & LinearAlgebra). Curious, tho, that two Python installs of mine (one in Debian and another in Vista) handled the originals just fine.
I also figured out the gnuplot issue. I was running SAGE on the VMWARE virtual machine, so my browser was on a different machine. The script generated gnuplot would show up in the VMWARE machine, and never on my browser. So, I've installed SAGE in a full Debian install I have (also VMWARE), and the gnuplot stuff works as expected: pops up a plot on the machine running SAGE. On the whole, I'd have to say the compatibility with native Python scripts is not bad. Thanks again for the tips. - Cronin On Jan 8, 2:40 pm, mabshoff <michael.absh...@mathematik.uni- dortmund.de> wrote: > On Jan 8, 12:03 pm, ztnews <cronin.vin...@gmail.com> wrote: > > Hi, > > > Forgive me if this is too obvious. I'm still evaluating/learning the > > basics of SAGE > > No problem, this is what a support group is for :) > > > Just how compatible is SAGE with Python? By which I mean, should I be > > able to just "drop-in" an existing/working python script and have it > > run, or should I expect some modifications will be required? And if > > so, what's the major things I need to keep an eye out for? > > One thing is that you need to deal with some numerical types, i.e. > > sage: j=numpy.complex(0,1) > sage: RealNumber=float > sage: Integer=int > > Seehttp://www.math.washington.edu/~jkantor/Numerical_Sage/node3.html > for more info on that. > > > > > I've looked in the documents, particularly "Coding in Python for Sage" > > >http://www.sagemath.org/doc/prog/node15.html > > > I'll illustrate by example. I found a Python script that does a > > physics calculation (band structure of silicon) > > >http://www.wag.caltech.edu/home/rpm/projects/tight-binding/harrison.py > > > or see here for a discussion of the script: > > >http://www.wag.caltech.edu/home/rpm/projects/tight-binding/ > > > I've successfully run harrison.py (without modification) using both > > linux and windows-based python installations. But under SAGE (I've > > installed the latest vmware version) required a little diddling to get > > it (mostly) running. > > > Two points. 1) This script calls for modules "Numeric" and > > "LinearAlgebra" > > > from Numeric import * # Make sure that NumPy is in your > > from LinearAlgebra import eigenvalues > > Numeric is the predecessor to NumPy which is in Sage. Nunmeric used to > be at least an optional spkg for Sage, but I am not sure if it still > works. Installing Numeric should be possible, but AFAIK this is > seriously outdated code. > > > both of which failed in SAGE. A couple minor modifications and I got > > past those points. I suspect these are deprecated, but still the > > Python installations handled the script without mods. > > You probably have either Numeric or an older numpy installed, but I am > not an expert about the finer details of what numeric code works with > that numpy release (if at all) > > > 2) The other thing that failed was the system call to gnuplot at the > > end of the script. I can imagine that would be hard make work in a > > SAGE-notebook environment, and I haven't managed that. > > Do you have gnuplot installed? If so what are the failures? Did the > gnuplot part of script work with the pure Python env? > > > Now, my point here is not that I need that script to run, > > particularly. My question is about compatibility. Have I missed > > something about how to execute a Python script with the minimum of > > modifications? > > Without going into specifics Sage ships a subset of what the usual > distributions ship for python modules, but adds some unusual ones that > aren't in every distribution. You can install pretty much any Python > module by running > > ./sage -sh > cd into unpacked python module directory > python setup.py install > > There might be problems with dependencies and so on, but for most pure > Python code this should work really well. > > > Thanks for your time. BTW, SAGE is really impressive. > > :) > > Cheers, > > Michael --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
