# 1 a = [1, 2, 3] b = a b.append(4) # print(a) # print(a is b) # 2 a = 10 b = a # print(a is b) b += 5 # print(a) # print(b) #3 # data = { # ([1, 2, 3]): "a", # (1, 2, 3): "b" # } # print(data) #4 a = (1, [2, 3]) # a[1].append(4) # print(a) #5 a = [1, 2, 2, 3] b = set(a) # print(len(a), len(b))