I am trying to update a single element in my nested list structure
I wanted to initialize an empty list as below
a= [[0]*2]*2
a
[[0, 0], [0, 0]]
Now i want to update only the 0,0 th element. So i end up assigning that like below.
a[0][0] = 999
However i notice that the 0th element of each nested list is getting updated.
a
[[999, 0], [999, 0]]
So i have noticed that this does not happen if i Initialize the list as below
b = [[0,0],[0,0]]
b[0][0]=999
b
[[999, 0], [0, 0]]
Can anyone help in my understanding of the above two different approaches and why one works and the other does not.
