Re: what does this mean exactly
Ondrej Certik
> Hi Ondrej,
>
> What precisely does this mean (from the sympy changelog)?
>
> * using true division in isympy (1/2 returns 0.5 instead of 0)
>
> Can you show me an actual running ipython session from start
> to finish where you illustrate what this means?
ondra@fuji:~/sympy$ ipython
Python 2.4.4 (#2, Aug 16 2007, 02:03:40)
Type "copyright", "credits" or "license" for more information.
IPython 0.8.1 -- An enhanced Interactive Python.
? -> Introduction to IPython's features.
%magic -> Information about IPython's 'magic' % functions.
help -> Python's own help system.
object? -> Details about 'object'. ?object also works, ?? prints more.
In [1]: 1/2
Out[1]: 0
In [2]:
ondra@fuji:~/sympy$ bin/isympy
Python console for SymPy.
In [1]: 1/2
Out[1]: 0.5
In [2]:
Exiting ...
> Also, what is isympy?
From:
http://code.google.com/p/sympy/wiki/Tutorial
There is also a little app called isympy (located in bin/isympy if you
are running from the source directory) which is just a standard python
shell that has already imported the relevant sympy modules and defined
the symbols x, y and z.
Ondrej
Ondrej
Ondrej Certik
>
> from __future__ import division
>
> since -- for SAGE at least -- it broke some third party
> packages.
SymPy should work using either convention.
> Oh, thanks for the clarification. I'm glad you're doing that,
> since it makes things much more usable for certain people.
>
> Keep up the good work,
You too!
Ondrej
William Stein
> On 9/9/07, William Stein <wst...@gmail.com> wrote:
> > Hi Ondrej,
> >
> > What precisely does this mean (from the sympy changelog)?
> >
> > * using true division in isympy (1/2 returns 0.5 instead of 0)
> >
> > Can you show me an actual running ipython session from start
> > to finish where you illustrate what this means?
>
> ondra@fuji:~/sympy$ ipython
> Python 2.4.4 (#2, Aug 16 2007, 02:03:40)
> Type "copyright", "credits" or "license" for more information.
>
> IPython 0.8.1 -- An enhanced Interactive Python.
> ? -> Introduction to IPython's features.
> %magic -> Information about IPython's 'magic' % functions.
> help -> Python's own help system.
> object? -> Details about 'object'. ?object also works, ?? prints more.
>
> In [1]: 1/2
> Out[1]: 0
>
> In [2]:
> ondra@fuji:~/sympy$ bin/isympy
> Python console for SymPy.
>
> In [1]: 1/2
> Out[1]: 0.5
>
> In [2]:
> Exiting ...
I remember trying to do
from __future__ import division
since -- for SAGE at least -- it broke some third party
packages.
> > Also, what is isympy?
Oh, thanks for the clarification. I'm glad you're doing that,
since it makes things much more usable for certain people.
Keep up the good work,
William