[Chicago] Sympy for Python 3 ???

Lewit, Douglas d-lewit at neiu.edu
Tue Sep 29 18:51:34 CEST 2015

Hi William,

Thanks for the reply.  I think Anaconda is GREAT!  However, there are times
when I prefer the simplicity of IDLE.  What's strange is that IDLE does not
have access to Anaconda's modules, even when I use Python's os.chdir( )
command to switch over to the folder/directory that contains those modules!
 (Or at least I think I did.  There are so many files! )  For example, when
I'm in Anaconda I can *import sympy* and everything is wonderful.  But IDLE
returns an error and complains that I'm trying to import a non-existent
module.   :-(  Anaconda is great, but 1) You can't go back and edit
previous lines in the Anaconda Terminal, and 2) the *ipython notebook*
solves this problem nicely, but I always have problems saving and
restarting the notebook's file.  On my Mac, the "ipython notebook" command
creates a Safari page, and I can use Python from within the Safari page.
Great!  But then let's say I save the file with a .ipynb extension.  If I
double-click on this file in the future, Safari opens it up alright, but
none of the command lines are executable, and the file isn't much fun to
read or look at.  I'm probably missing a step or a command or something
like that.  But yes, in general Anaconda is quite impressive and the
installation is pretty easy.  In Anaconda all the important modules are at
my fingertips, so it is really nice to work with for the most part.  But
again, IDLE has advantages.  In IDLE, I can move the cursor around inside a
function's definition to change stuff.  Not in the Anaconda Terminal.  Once
I ENTER over to the next line, I'm stuck!  I can't get back.  The best I
can do is just CNTRL-C and start my function definition over again.

I think my answer was way too long!  Sorry!  Just trying to explain what's
going on.  I just wish there was a way that I could get IDLE to access all
the modules that Anaconda can access.  Not really sure how to do it without
tearing apart my operating system.  (And I really don't want to do that! )
 I must say that on this particular issue Linux really does have a leg up
on Mac OS-X because of Linux's builtin package managers.  However, for
other things I really prefer Mac OS-X.  I wish we could combine the best of
both worlds!  Let's call it LINAC!!!   :-)


On Tue, Sep 29, 2015 at 8:19 AM, William E. S. Clemens <wesclemens at gmail.com
> wrote:

> I would personally highly recommend MacPorts over Homebrew.
> I find Homebrew to have some security concerns. I haven't played around
> with Homebrew in a few years so they may have corrected this issue.
> Homebrew installs itself and the software it manages  in /usr/local/ and
> changes the permissions on this folder so the user that install Homebrew
> can write to this directory. This is concur because a malicious pieces of
> software can easy modify command line tools and basic unix utilities by
> writing to this directory.
> If you are just looking for a simple way to mange your Python packages I
> wouldn't recommend going with either of these. You can install newer
> versions of Python for python.org. The newer versions have pip included
> with it so it makes life a little easier.
> If you want to go the path of least resistance you can install the
> Anaconda. This Python distribution uses an alternative package manager call
> conda. Although it has fare fewer packages then pip and Pypi, It ships all
> the major packages in wheels that can easy be installed on OSX without the
> need to compile the C/Fortran parts. Whereas pip downloads the source and
> attempts to compile it. Pip's method is more prone to failure especially on
> OSX where you are using a different compiler then Linux.
> Managing  your Python software dependancies on a system wide basis can
> have issues. Have you ever looked into using virtualenv?
> --
> William Clemens
> Phone: 847.485.9455
> E-mail: wesclemens at gmail.com
> On Tue, Sep 29, 2015 at 6:04 AM, Tanya Schlusser <tanya at tickel.net> wrote:
>> > P.S.  Almost forgot.... is there a Mac OS-X equivalent to the useful
>> Ubuntu
>> > command:
>> > sudo apt-get install ..... and
>> > sudo apt-get remove .....
>> There are two popular options: homebrew and macports. For homebrew, open
>> a terminal and type:
>> ruby -e "$(curl -fsSL
>> https://raw.githubusercontent.com/Homebrew/install/master/install)"
>> and type this at the bottom of your ~/.profile file :
>> export PATH=/usr/local/bin:/usr/local/sbin:$PATH
>> and then do this in the terminal:
>> brew install python
>> Other homebrew options at: http://brew.sh/
>> _______________________________________________
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