0525习题

for i in range(1000,2201):
    if i % 7 == 0 and i % 5 != 0:
        print(i,end = " ")

def func(num):
    if num == 0:
        return 1

    return num * func(num - 1)
print(func(5))

for i in range(100,1000):
    a = i//100
    b = i//10 % 10
    c = i%100%10
    if a**3 + b**3 + c**3 == i:
        print(i)

name = 'seven'
passwd = '123'
num = 3
while num:
    input_name = input("请输入用户名")
    input_passwd = input("请输入密码")
    if input_name == name and input_passwd == passwd:
        print("登陆成功")
        break
    else:
        print("登陆失败")
    num = num - 1

x,y=eval(input("请输入两个数字，逗号分隔："))
lst_num=[]
for i in range(x):
    L=[]
    for j in range(y):
        L.append(j*i)
    lst_num.append(L)
print(lst_num)

def rank(score):
    if isinstance(score,int):
        if 90 <= score <= 100:
            print("优秀")
        elif 80<= score <= 89:
            print("良好")
        elif 60<= score <= 79:
            print("及格")
        elif 0<= score <= 59:
            print("不及格")
        else:
            print("输入有误!")
try:
    score = eval(input("请输入一个学生的成绩"))
    rank(score)
except Exception as e:
    print("请输入数字")

def test(name):
    if name == 'exit':
        print('欢迎下次使用')
    if name[0].isalpha() or name[0] == '_':
        for i in name[1:]:
            if not (i.isalnum() or i == '_'):
                print('变量名不合法')
                break
        else:
            print('变量名合法!')
    else:
        print('变量名非法!')

name = input()
test(name)

def comb(n,m):
    if(n == m or (not m)):
        return 1
    else:
        return comb(n-1,m) + comb(n-1,m-1)


try:
    n,m = eval(input())
    print(comb(n,m))
except :
    print("输入有误!")

def sort(dct):
    newDct={}
    items = list(dct.items())
    items.sort(key=lambda x:x[1],reverse=True)
    for i in range(len(dct)):
        name,score = items[i]
        newDct[name] = score
        print("第%d名:%s,成绩: %.2f分"%(i+1,name,newDct[name]))

def avg(dct):
    scores = list(dct.values())
    print("最高分:%.2f"%(max(scores)),end = "")
    print("最低分:%.2f" % (min(scores)),end="")
    print("平均分:%.2f" % (sum(scores) / len(scores)),end="")

dct={}
dct['张三'],dct['李四'],dct['王五'],dct['赵六'],dct['侯七']=eval(input())
sort(dct)
avg(dct)

words = "Python"
print("{:#^9}".format(words))

string = "Python"
if "p" in string:
    print(string[:-1])
else:
    print(string[0:4])

# 创建文件data.txt，共100000行，每行存放一个1～100之间的整数
import random
f = open('data.txt','w+')
for i in range(100000):
    f.write(str(random.randint(1,100)) + '\n')
f.seek(0,0)
print(f.read())
f.close()

# 生成100个MAC地址并写入文件中，MAC地址前6位（16进制）为01-AF-3B
# 01-AF-3B(-xx)(-xx)(-xx)
# -xx
# 01-AF-3B-xx
# -xx
# 01-AF-3B-xx-xx
# -xx
# 01-AF-3B-xx-xx-xx


import random
import string

def create_mac():
    mac = '01-AF-3B'
    # 生成16进制的数
    hex_num = string.hexdigits
    for i in range(3):
        # 从16进制字符串中随机选择两个数字
        # 返回值是一个列表
        n = random.sample(hex_num,2)
        # 拼接内容 将小写字母转换称大写字母
        sn = '-' + ''.join(n).upper()
        mac += sn
    return mac

# 主函数 随机生成100个mac地址
def main():
    with open('mac.txt','w') as f:
        for i in range(100):
            mac = create_mac()
            print(mac)
            f.write(mac + '\n')
main()

# 生成一个大文件ips.txt,要求1200行,每行随机为172.25.254.0/24段的ip
# 读取ips.txt文件统计这个文件中ip出现频率排前10的ip

import random
def create_ip(filename):
    ip=['172.25.254.'+str(i) for i in range(1,255)]
    with open(filename,'w') as f:
        for i in range(1200):
            f.write(random.sample(ip,1)[0]+'\n')
create_ip('ips.txt')

ips_dict={}

with open('ips.txt') as f :
    for ip in f:
        ip=ip.strip()
        if ip in ips_dict:
            ips_dict[ip]+=1
        else:
            ips_dict[ip]=1

sorted_ip=sorted(ips_dict.items(),key=lambda x:x[1],reverse=True)[:10]
print(sorted_ip)