Hi Laurent,
Thank you for your answer. I am trying to understand your code (I
started to use sage just yesterday, so it can be a problem for me).
The first 2 lines looks like you want to execute the commands in as a
shell script. This assumptions is also supported by by a fact that I
have to make the with the code executable. Is my assumption correct.
Next, you write that sage is just a Python module. I guess it means
that I can run sage code like a python code (if I connect the module
in a appropriate way). I assume that the module can be connected by
the following line:
from sage.all import *
But because of some reason it does not work. I create a file called
"test.py". I put there just one line "from sage.all import *" and then
I execute this code as a Python program "python test.py". Then I get
the following:
File "test.py", line 1, in <module>
from sage.all import *
ImportError: No module named sage.all
Anyway, if I do not try to guess and just use the code given by you in
a described (by you) way I get the following:
bash: ./test.sh: /usr/bin/sage: bad interpreter: No such file or
directory
For mode details, I put the code in "test.sh". I make this file
executable "chmod +x test.sh". Then I run it in the shell command line
"./test.sh".
On May 29, 7:33 am, Laurent <moky.m...@gmail.com> wrote:
> Sage is a python module.
>
> The following is an example which defines a class from which you can
> manipulate functions :
>
> -------------------------------------------------
>
> #! /usr/bin/sage -python
> # -*- coding: utf8 -*-
>
> from sage.all import *
>
> class MaClasse(object):
> def __init__(self,exp):
> self.sage = exp
> self.sageFast = self.sage._fast_float_(x)
> def Derr(self):
> return MaClasse(self.sage.derivative())
> def Evaluation(self,xe):
> return numerical_approx(self.sageFast(xe))
>
> var('x,y')
> f = MaClasse(x**2+2)
>
> print f.Derr().sage
> print f.Derr().Evaluation(3)
> print f.Evaluation(8)
>
> --------------------------------------
>
> Copy-paste it in a text file, make it executable, and enjoy !
>
> Laurent
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