import random
- 编写一个函数，求1+2+3+...+N
def sum_n(n):
s = 0
for i in range(1, n+1):
s += i
print(s)
sum_n(10)
- 编写一个函数，求多个数中的最大值
def max_muti(*args):
print(max(args))
max_muti(1, 2, 3, 45, 6, 7)
- 编写一个函数，实现摇色子的功能，打印n个色子的点数和
def sum_dice(n : int):
dice = []
s = 0
for i in range(1, n+1):
dice.append(random.randint(1, 6))
s += sum(dice)
print(s)
sum_dice(5)
- 编写一个函数，交换指定字典的key和value。
例如:{'a':1, 'b':2, 'c':3} ---> {1:'a', 2:'b', 3:'c'}
def exchange_key_value(n:dict):
new_dict = {}
for key in n:
new_dict[n[key]] = key
print(new_dict)
exchange_key_value({'a':1, 'b':2, 'c':3})
- 编写一个函数，三个数中的最大值
def max_three_num(a, b, c):
m = 0
list1 = []
list1.append(a)
list1.append(b)
list1.append(c)
m = max(list1)
print(m)
max_three_num(110, 256, 389)
- 编写一个函数，提取指定字符串中的所有的字母，然后拼接在一起后打印出来
例如：'12a&bc12d--' ---> 打印'abcd'
def alphabet(s: str):
new_list = []
for i in (s):
if 'a' <= i <= 'z' or 'A' <= i <= 'Z':
print(i, end = '')
- 写⼀一个函数，求多个数的平均值
def mean(*args):
list1 = list(args)
m = sum(list1) / (len(list1))
print(m)
mean(5,10,15,100,555)
alphabet('12a&bc12d--')
- 写一个函数，默认求10的阶层，也可以求其他数的阶层
def fac(n : int):
f = 1
for i in range(1, n+1):
f *= i
print(f)
fac(10)
- 写⼀一个函数，可以对多个数进行不同的运算
例例如: operation('+', 1, 2, 3) ---> 求 1+2+3的结果
operation('-', 10, 9) ---> 求 10-9的结果
operation('', 2, 4, 8, 10) ---> 求 24810的结构
def operation(operator, *args):
print(operator, args)
if operator == '+':
s = sum(args)
print(s)
if operator =='-':
substraction=0
for i in args[:]:
substraction -= i
subs=substraction+args[0]
print(subs)
if operator == '*':
multi = 1
for i in (args):
multi *= i
print(multi)
operation('-',1,2,3,4,5)
