On 09/16/2013 07:43 AM, Arturo B wrote:
> It uses a list comprenhension to generate the Latin Square, I'm am a newbie
> to Python, and I've tried to figure out how this is evaluated:
>
> a = [1, 2, 3, 4]
> n = len(a)
> [[a[i - j] for i in range(n)] for j in range(n)]
>
> I don't understand how the "i" and the "j" changes.
> On my way of thought it is evaluated like this:
It helps to convert it to a conventional for loop to see how it works:
a = [1, 2, 3, 4]
n = len(a)
resultj = []
for j in range(n):
resulti = []
for i in range(n):
resulti.append(a[i-j])
resultj.append(resulti)
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