Shallow and deep copy

Shallow copy

a = [[1,2,3],[4,5,6]]
b = list(a)
print(id(a[0]))
print(id(b[0]))
 
# Output
2033801422336
2033801422336

If using shallow copy, when we edit list a element instance also edit this element in list b.

from copy import deepcopy
c = deepcopy(a)
print(id(a[0]))
print(id(c[0]))
 
# Output
2033801422336
2033801600000