hello,

I need a nested list, like this

>>> A= [ [None,None], [None,None], [None, None] ]
>>> A[2][0] =77
>>> A
[[None, None], [None, None], [77, None]]


Because the list is much larger, I need a shortcut (ok I can use a for loop)
So I tried
>>> B = 3 * [ [ None, None ]]
>>> B[2][0] = 77
>>> B
[[77, None], [77, None], [77, None]]

which doesn't work as expected.

any suggestions ?

thanks,
Stef
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