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import copy

a = [1,2,3]
b = a
b[1]=22
print(a)
print(id(a) == id(b))

# deep copy
c = copy.deepcopy(a)
print(id(a) == id(c))
c[1] = 2
print(a)
a[1] = 111
print(c)

# shallow copy
a = [1,2,[3,4]]
d = copy.copy(a)
print(id(a) == id(d))
print(id(a[2]) == id(d[2]))