python序列的数学运算

# 序列的加操作

print([1,2]+[3,4,5]) #[1, 2, 3, 4, 5]

# 序列的加操作

print([1,2]+[3,4,5]) #[1, 2, 3, 4, 5]

# print([1,2]+"string")

#TypeError: can only concatenate list (not "str") to list

print([1,2]+"string")

# utf-8

mString = "python"

# 序列的乘法操作

print(mString * 2) #pythonpython