1. Which of the following expression is Illegal?
O A.['12.56'] * 7 O B. int(7.4) 7.4 O C.['a','b','c']-['a'] O D.str(1.32)*5
考查:列表,整数,字符串的运算规则
在Python中，列表的加法运算是将两个列表拼接成一个新的列表，例如：
代码语言：javascript复制a = [1, 2, 3]
b = [4, 5, 6]
c = a b # [1, 2, 3, 4, 5, 6]列表的乘法运算是重复一个列表多次得到一个新的列表，例如：
代码语言：javascript复制a = [1, 2, 3]
b = a * 3 # [1, 2, 3, 1, 2, 3, 1, 2, 3]列表不存在减法和除法运算。->选c
2.Function defining
Please define a function which can find out the all multiples of 3 (3的倍数) from 0 to nand return the sum of those mutiples.
Header of the function:
在这里描述函数接口。
例如:def acc_three(n): n is larger than 3 and smaller than 1000
代码语言：javascript复制def acc_three(n):
sum = 0
for i in range (3,n 1):
if i % 3 == 0:
sum = i
return sum
#
