列表和元组

a = (1,2,3,[1,2,4])

print(a[3][0]) # 输出1
print(a[3][1]) # 输出2
print(a[3][2]) # 输出4

b =(1,2,3,[1,2,[3,4,5,6]])

print(b[3][2][0]) # 输出3
print(b[3][2][1]) # 输出4

a = (1,2,3,[1,2,['a','b','c']])
print(a[3][2][1])  # 输出b