Hi, Vincent.
What I want to do is to get a polynomial which is in the polynomial ring
R.<e,x,y,z> = PolynomialRing(ZZ, 4).
Do you know how to do this?
Thanks,
Sihuang
在 2015年1月3日星期六UTC+1下午4时05分08秒，vdelecroix写道：
>
> Hello,
>
> If it is just a matter of display you can use the method .replace() of
> strings
>
> sage: sage: initial_string = "$.1 + 3 $.2"
> sage: sage: initial_string.replace("$.1", "e").replace("$.2", "f")
> 'e + 3 f'
>
> You can also have a look at
> http://stackoverflow.com/questions/6116978/python-replace-multiple-strings
> for multiple replacement.
>
> To convert your magma polynomial p into a string just do str(p).
>
> Vincent
>
> 2015-01-03 15:40 UTC+01:00, Sihuang Hu <[email protected] <javascript:>>:
> > Hi,
> >
> > I found that Sage is not able to compute the Complete Weight Enumerator
> of
> > Linear Codes.
> > So I load magma to compute it:
> >
> > sage: k.<a> = GF(2**2)
> > sage: MS = MatrixSpace(k,4,7)
> > sage: G = MS([[1,1,1,0,0,0,0], [1,0,0,1,1,0,0], [0,1,0,1,0,1,0],
> > [1,1,0,1,0,0,1]])
> > sage: C = LinearCode(G)
> > sage: magma.CompleteWeightEnumerator(C)
> > $.1^7 + 7*$.1^4*$.2^3 + 7*$.1^4*$.3^3 + 7*$.1^4*$.4^3 + 7*$.1^3*$.2^4 +
> > 7*$.1^3*$.3^4 + 7*$.1^3*$.4^4 + 42*$.1^2*$.2^2*$.3^2*$.4 +
> > 42*$.1^2*$.2^2*$.3*$.4^2 + 42*$.1^2*$.2*$.3^2*$.4^2 +
> > 42*$.1*$.2^2*$.3^2*$.4^2 + $.2^7 + 7*$.2^4*$.3^3 + 7*$.2^4*$.4^3 +
> > 7*$.2^3*$.3^4 + 7*$.2^3*$.4^4 + $.3^7 + 7*$.3^4*$.4^3 + 7*$.3^3*$.4^4 +
> > $.4^7
> >
> > Do anyone know how I can get the output of
> > 'magma.CompleteWeightEnumerator(C)'
> > as the following form
> > e^7 + 7*e^4*x^3 + 7*e^4*y^3 + 7*e^4*z^3 + ...
> > In other words, display $.1 -> e, $.2 -> x, $.3 -> y, $.4 -> z.
> >
> > Thanks,
> > Sihuang
> >
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