On 20.05.19 05:29, jianrong wrote:
> I am trying to write a function in sage to permute a list of elements.
An alternative might me something along the following:
|
Permutation("(1,2,3)(4,5)").action(['a', 'b', 'c', 'd', 'e'])
|
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Simplifying the function and adding a docstring with an example:
def f(i, v1):
r"""
Return a copy of this list with elements of index `i` and `i + 1`
swapped.
EXAMPLE::
sage: l = [5, 4, 3, 2, 1, 0]
sage: f(3, l)
[5, 4, 3, 1, 2, 0]
"""
v = list(v1)
Thank you very much!
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> On May 19, 2019, at 20:29 , jianrong wrote:
>
> Dear All,
>
> I am trying to write a function in sage to permute a list of elements.
>
> def f(i, v1):
> v=[]
> for j in v1:
>v.append(j)
>
> print(v)
> v[i+1]=v1[i]
> v[i]=v1[i+1]
> return v
>
> But the above codes do not work. I could
Dear All,
I am trying to write a function in sage to permute a list of elements.
def f(i, v1):
v=[]
for j in v1:
v.append(j)
print(v)
v[i+1]=v1[i]
v[i]=v1[i+1]
return v
But the above codes do not work. I couldn't figure out the mistake. Thank you
very much.
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