[sage-support] INSTALLATION ISSUE: SageMath 8.4 Apache Server Conflict
Not a question, just a For Your Information. If you have an Apache server instance running there may be a conflict requiring you to modify your "httpd-vhosts.conf" file. You may need to add something like this with being the port number Sage is trying to run on. The "ServerName" doesn't really seem to matter, but I put "Sage" in as a test and it worked. My installation of the 8.4 app.dmg would not run the Jupyter notebook or for that matter the sage notebook until I made this modification. ServerName Sage -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
[sage-support] Re: Solving recursion formula?
On 2018-12-09, Marc Mezzarobba wrote: > Simon King wrote: >> What about >> a more complicated recurrence, such as the one given by >> x_(n+1) = 1 + x_n*2/n >> Any chances to solve those and similar recurrences automatically? > > You can try sympy's rsolve() or Maxima's solve_rec(). I don't know how > powerful they are. Hi Marc, I had a look and it seems that it is doing what I was looking for. Thank you for the hint! Coincidentally, William Stein today advertised a multi author book on doing computations with Sage, and it has a chapter on solving recurrences, also pointing to sympy. Best regards, Simon -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
[sage-support] Re: attaching files in a jupyter notebook
I would expect magic commands to work a little differently in the jupyter
gui than on the command line, so the possibility for an error doesn't
surprise me too much. It can probably be fixed. However, a straight-up
"attach('')" would hopefully work? It still needs to hook into
the REPL to actually check for a changed file and do the reloading, but
that has a better chance of being the same between the IPython CLI shell
and the Jupyter notebook.
On Wednesday, December 12, 2018 at 9:15:46 AM UTC-8, John Cremona wrote:
>
> I have a file testcong.py which contains various functions I am
> developing, while testing them in a jupyter notebook. The first cell in
> the notebook has the "magic" line "%run testcong.py" and so whenever I make
> a change to the .py file I have to re-click on that cell. This gets
> tedious, especially when the testing notebook has may cells in it since I
> am forever scrolling up and down.
>
> There has to be a better way. From the command line one can use attach
> instead of runfile (which automatically rereads the file when it changes)
> but I cannot get that to work, even though there is a magic %attach command:
>
> %attach testcong.py
>
> fails with a weird error message which is incomprehensible to me:
>
> "UsageError: Invalid GUI request 'sage', valid ones are:['osx', 'widget',
> 'qt5', None, 'qt', 'nbagg', 'gtk', 'qt4', 'gtk3', 'notebook', 'tk',
> 'ipympl', 'inline', 'asyncio', 'wx']"
>
> while
>
> %attach "testcong.py"
>
> (with quotes) is better, it just cannot find the file (which is in the
> current directory, i.e. the one I started the notebook from). But giving
> the full pathname
>
> %attach "/home/jec/congruences/testcong.py"
>
> also gives "IOError: did not find file
> '/home/jec/congruences/testcong.py"' to load or attach"
>
> What am I doing wrong? I did try looking for documentation but failed...
>
>
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[sage-support] attaching files in a jupyter notebook
I have a file testcong.py which contains various functions I am developing, while testing them in a jupyter notebook. The first cell in the notebook has the "magic" line "%run testcong.py" and so whenever I make a change to the .py file I have to re-click on that cell. This gets tedious, especially when the testing notebook has may cells in it since I am forever scrolling up and down. There has to be a better way. From the command line one can use attach instead of runfile (which automatically rereads the file when it changes) but I cannot get that to work, even though there is a magic %attach command: %attach testcong.py fails with a weird error message which is incomprehensible to me: "UsageError: Invalid GUI request 'sage', valid ones are:['osx', 'widget', 'qt5', None, 'qt', 'nbagg', 'gtk', 'qt4', 'gtk3', 'notebook', 'tk', 'ipympl', 'inline', 'asyncio', 'wx']" while %attach "testcong.py" (with quotes) is better, it just cannot find the file (which is in the current directory, i.e. the one I started the notebook from). But giving the full pathname %attach "/home/jec/congruences/testcong.py" also gives "IOError: did not find file '/home/jec/congruences/testcong.py"' to load or attach" What am I doing wrong? I did try looking for documentation but failed... -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
