When I manually declare and initialise all the elements in a list of lists and change one of the values, the change can be seen as one would expect.
a=[[0,0,0],[0,0,0]]
a[0][0]=9
print(a)
The output is [[9,0,0],[0,0,0]] as one would expect.
However, when I use shorthand notation, changing the first element of the first list changes the first element of all the lists. Here's the code:
a=[[0]*3]]*2
a[0][0]=9
print(a)
This time, the output is [[9,0,0],[9,0,0]]!
What's going on?
