[sage-support] Re: Strange construction in autogenerated Python
Hi Greg, On 28 Mrz., 06:25, Greg Kuperberg greg.kuperb...@gmail.com wrote: On Mar 27, 1:39 pm, simon.k...@uni-jena.de wrote: Side note: In order to change to the latest sage version, it is not needed to compile from scratch again. Just do sage -upgrade on the command line. Provided that you are connected with internet, it will retrieve the changes from sage 3.2.3 to the latest version and re- compile (only) the necessary bits. So, this is much faster than compiling from scratch. That's a good suggestion. But I just did that, and it still took 90 minutes, although starting the process was trivial. Well, i said much faster. And 90 minutes, compared with 5 hours or so for a fresh compilation, is quite good imho. Cheers, Simon --~--~-~--~~~---~--~~ 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 -~--~~~~--~~--~--~---
[sage-support] Re: Strange construction in autogenerated Python
On Thu, 26 Mar 2009 at 10:24PM -0700, Timothy Clemans wrote: Instead of actually modifying Python to fix some annoyances Sage uses IPython to preparse the code. For example in Sage 4 ^ 6 is preparsed into 4 ** 6. I think he's curious about Integer() being applied twice, when once is obviously enough. I just looked at an autogenerated .py file, and I only see things like _sage_const_1 = Integer(1)...Greg, where do you have 2's in your original .sage file? Dan On Thu, Mar 26, 2009 at 9:52 PM, Greg Kuperberg greg.kuperb...@gmail.com wrote: Hi. I see that when I make file called foo.sage, sage precompiles it into another file called foo.py. The code statement in this file is: _sage_const_2 = Integer(Integer(2)) Surely this is wrong? Maybe it does not matter if this Python code is only executed once. But still it looks strange. -- --- Dan Drake dr...@kaist.edu - KAIST Department of Mathematical Sciences --- http://mathsci.kaist.ac.kr/~drake signature.asc Description: Digital signature
[sage-support] Re: Strange construction in autogenerated Python
1) I am using sage 3.2.3, which was current when I installed it in January. It was convenient for me to compile it from scratch, but it then takes a long time to install. 2) Here is my sage code. The program estimates the probability of ever getting a 6-way tie if you repeatedly roll a die and count the number of times that you get each result. n = 100 s = 0. for k in xrange(1,n+1): t = float(factorial(6*k)/factorial(k)^6/6^(6*k)) s += t print k,s,float(t),t*float(k)^(2.5) c = sqrt(6.)*float(2*pi)^(-2.5) print Limit by Stirling's approx:,c tu = 2*c/3.*float(n)^(-1.5) print Tail upper bound:,tu s += tu print Total upper bound:,s print Estimate for chance ever:,s/(1.+s) --~--~-~--~~~---~--~~ 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 -~--~~~~--~~--~--~---
[sage-support] Re: Strange construction in autogenerated Python
Hi Greg, On 27 Mrz., 21:21, Greg Kuperberg greg.kuperb...@gmail.com wrote: 1) I am using sage 3.2.3, which was current when I installed it in January. It was convenient for me to compile it from scratch, but it then takes a long time to install. Side note: In order to change to the latest sage version, it is not needed to compile from scratch again. Just do sage -upgrade on the command line. Provided that you are connected with internet, it will retrieve the changes from sage 3.2.3 to the latest version and re- compile (only) the necessary bits. So, this is much faster than compiling from scratch. Cheers, Simon --~--~-~--~~~---~--~~ 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 -~--~~~~--~~--~--~---
[sage-support] Re: Strange construction in autogenerated Python
On Mar 27, 1:39 pm, simon.k...@uni-jena.de wrote: Side note: In order to change to the latest sage version, it is not needed to compile from scratch again. Just do sage -upgrade on the command line. Provided that you are connected with internet, it will retrieve the changes from sage 3.2.3 to the latest version and re- compile (only) the necessary bits. So, this is much faster than compiling from scratch. That's a good suggestion. But I just did that, and it still took 90 minutes, although starting the process was trivial. On the bright side, in Sage 3.4, the Integer(Integer(n)) bug is fixed. --~--~-~--~~~---~--~~ 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 -~--~~~~--~~--~--~---
[sage-support] Re: Strange construction in autogenerated Python
On Mar 26, 10:24 pm, Timothy Clemans timothy.clem...@gmail.com wrote: Instead of actually modifying Python to fix some annoyances Sage uses IPython to preparse the code. For example in Sage 4 ^ 6 is preparsed into 4 ** 6. Yep. On Thu, Mar 26, 2009 at 9:52 PM, Greg Kuperberg greg.kuperb...@gmail.com wrote: Hi. I see that when I make file called foo.sage, sage precompiles it into another file called foo.py. The code statement in this file is: _sage_const_2 = Integer(Integer(2)) Surely this is wrong? Maybe it does not matter if this Python code is only executed once. But still it looks strange. What Sage release are you using? In Sage 3.3 or so there was a bug so that each input was preparsed twice, but that has since been fixed. 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 -~--~~~~--~~--~--~---
