Comparing in-memory locations of lists vs. slices of list vs. reassigning elements to list reference

slice.py

x = [1,2,3]

def test():
  print("x-slice id before",id(x[:]))
  print("x-slice before", x[:])
  x[:] += [4]
  print("x-slice id after",id(x[:]))
  print("x-slice after", x[:])

print("x id", id(x))
print("x", x)
test()
print("x id", id(x))
print("x", x)