python小练习

大牛更新的练习题，说好的持续更新呢。以自己目前学到的知识点写出来的代码，新人可以看看

http://www.nnzhp.cn/archives/433

练习1：

产生的账号是以@163.com结尾，长度由用户输入，产生多少条也由用户输入，用户名不能重复，用户名必须由大写字母、小写字母、数字组成

import string,random
lenth = input("请输入用户名的长度:")
num = input("请输入产生用户的条数：")
namelist = []
count = 0
with open('name.txt','a+') as f:
    while count < int(num):
        lowletter = random.sample(string.ascii_lowercase,1)#返回一个列表
        upletter = random.sample(string.ascii_uppercase,1)
        numletter = random.sample(string.digits,(int(lenth)-2))
        tmp = lowletter+upletter+numletter
        random.shuffle(tmp)
        name = ''.join(tmp)

        if name in namelist:#用户名不能重复
            continue
        else:
            namelist.append(name)
            count +=1
            f.write(name+'@163.com\n')

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练习2：

公司服务器，经常被别人攻击，要写个监控nginx日志的脚本，每分钟运行一次，如果这一分钟内同一个ip请求次数超过100次，加入黑名单

日志文件格式如下：

178.210.90.90 - - [04/Jun/2017:03:44:13 +0800] "GET /wp-includes/logo_img.php HTTP/1.0" 302 161 "http://nnzhp.cn/wp-includes/logo_img.php" "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) AppleWebKit/533.4 (KHTML, like Gecko) Chrome/5.0.375.99 Safari/533.4" "10.3.152.221"
178.210.90.90 - - [04/Jun/2017:03:44:13 +0800] "GET /blog HTTP/1.0" 301 233 "http://nnzhp.cn/wp-includes/logo_img.php" "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) AppleWebKit/533.4 (KHTML, like Gecko) Chrome/5.0.375.99 Safari/533.4" "10.3.152.221"
178.210.90.90 - - [04/Jun/2017:03:44:15 +0800] "GET /blog/ HTTP/1.0" 200 38278 "http://nnzhp.cn/wp-includes/logo_img.php" "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) AppleWebKit/533.4 (KHTML, like Gecko) Chrome/5.0.375.99 Safari/533.4" "10.3.152.221"
66.249.75.29 - - [04/Jun/2017:03:45:55 +0800] "GET /bbs/forum.php?mod=forumdisplay&fid=574&filter=hot HTTP/1.1" 200 17482 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)" "-"

import time
point = 0
while 1:

    with open('access.log','r') as f:
        f.seek(point)
        ipList = {} #存放ip和出现的次数
        # ipList = []#回家用存list方式再写一遍**********************
        for line in f:
            ip = line.split()[0]
            # print(ip)
            if ip in ipList:
                ipList[ip] += 1
            else:
                ipList[ip] = 1
        # print(ipList)
        point = f.tell()
        for k in ipList:
            if ipList.get(k)>=50:
                print('该ip:%s在攻击你'%k)
        #
        # for i in ipList:
        #     if ipList.count(i) >=100:
        #         heike.append(i)
        #         print('该ip:%s在攻击你' % i)

    time.sleep(60)#程序停止60s(此时平台获取60s的日志)

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练习3：

额，来个小插曲，写程序求出1-100的累加和。1+2+3+4+5+.....+100

sum = 0
for i in range(101):
    sum+=i
print(sum)

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练习4：

不知不觉你已经写了很多python代码了，代码全部都放在e盘下面的my_code文件夹中，突然突发奇想，想统计了一下总共写了多少行代码包括空行和注释，要把代码的行数、空行数、注释行数都统计出来。

spaceCount = 0 #空格行数
zCount = 0 #注释行数
cCount = 0 #代码行数
start_index = False #多行注释是否开始
with open('高效循环字典的方式.py','r',encoding='utf-8') as f:
    for i,line in enumerate(f,1):
        if not start_index:
            if line.strip().startswith("'''") or line.strip().startswith('"""'):
                start_index = True
                startline = i

            elif not line.strip():
                spaceCount+=1

            elif line.strip()[0] == '#':
                zCount+=1
            else:
                cCount+=1

        else:
            if line.strip().startswith("'''") or line.strip().startswith('"""'):
                endline = i
                zCount += endline - startline+1
                start_index = False #多行注释结束，标志位恢复


print('总代码行数：',i)
print('空行数：',spaceCount)
print('注释行：',zCount)

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练习5：

有一个文件，里面有一些敏感词汇，如下，如果输入这些词，就用**代替，然后输出，例如输入今天没吃饭，碰到一个傻逼，原来那个sb是小明。输出今天没吃饭，碰到一个**，原来那个**是小明。

word.txt的内容如下：

SB
傻逼
煞笔
shabi
傻b
傻B
煞比
sb

str = input('请输入：')
with open('word.txt','r',encoding='utf-8') as f:

    for i in f:
        i = i.strip()
        if i.strip() in str:
            str = str.replace(i.strip(),'***')

    print(str)

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练习6：

python可不引入第三方变量就可交换两个变量的值

a=1
b=2
a,b = b,a
print(a,b)

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练习7：

现有字符串a="Im Love python"，需要变成b="python love Im"

a = "Im Love python"
alist = a.split()
print(alist)
alist.reverse()
print(' '.join(alist))

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练习8：

将"wdnwjfwj we hd 9#sdfekfmew 2011"里的数字取出来相加结果为2020

str = "wdnwjfwj we hd 9#sdfekfmew 2011"
list = str.split()
re = int(list[3][0])+int(list[4])
print(re)

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练习9：

下面有两个队伍，，a不和x对战，b不和y,z，请写代码实现

team1 = ['a','b','c']
team2 = ['x','y','z']
for i in range(len(team1)):
    for j in range(len(team2)):
        if team1[i]=='a' and team2[j]=='x':
            pass
        elif team1[i]=='b' and team2[j]== 'y':
            pass
        elif team1[i]=='b' and team2[j]== 'z':
            pass

        else:
            print(team1[i],' VS ',team2[j])

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练习10：

使用for循环输出1 2 3 4 5 6 8 9 10

for i in range(10):
    if i == 6:
        pass
    else:
        i += 1
        print(i,end=' ')

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输出 1-100 内的所有奇数

for i in range(100):
    if i%2!=0:
        print(i,end=' ')

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输入quit退出循环

while 1:
    text = input('请输入：')
    if text == 'quit':
        print('退出成功')
        break
    else:
        continue

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