python操作文件（增、删、改、查）

内容

global
        log 127.0.0.1 local2
        daemon
        maxconn 256
        log 127.0.0.1 local2 info
defaults
        log global
        mode http
        timeout connect 5000ms
        timeout client 50000ms
        timeout server 50000ms
        option  dontlognull

listen stats :8888
        stats enable
        stats uri       /admin
        stats auth      admin:1234

frontend oldboy.org
        bind 0.0.0.0:80
        option httplog
        option httpclose
        option  forwardfor
        log global
        acl www hdr_reg(host) -i www.oldboy.org
        use_backend www.oldboy.org if www

backend www.oldboy1.org
        server 10.10.0.10 10.10.0.10 weight 9999 maxconn 33333333333
        server 10.10.10.1 10.10.10.1 weight 22 maxconn 2000
        server 2.2.2.4 2.2.2.4 weight 20 maxconn 3000
backend www.oldboy2.org
        server 3.3.3.3 3.3.3.3 weight 20 maxconn 3000
backend www.oldboy20.org
        server 10.10.0.10 10.10.0.10 weight 9999 maxconn 33333333333

增

arg = {'backend': 'www.oldboy.org','record':{'server':'10.10.0.10 10.10.0.10',"weight":"9999", "maxconn": "33333333333"}}
count=0
while True:
    choice=eval(input("请输入一个字典{}"))
    with open( "haproxy.conf",'r') as a,open("b.txt",'w') as b:
        for line in a:
            count+=1
            if count==26:
             b.write (str(choice["backend"]))
             b.write('
')
             b.write(str(choice["record"]).strip('{}'))
            else:b.write(line)

删除：

import sys, time
count=0
l=[]
while True:
    with open( "haproxy.conf",'r') as a:
            for i in a:
                count+=1
                print(i,count)
            else:
                count=0
                print(count)
    choice=input("请输入要删除的行---->：").strip()
    for i in choice:
        if i.isdigit():
            l.append(int(i))
    with open( "haproxy.conf",'r') as a,open("b.txt",'w') as b:
        for line in  a:
            count+=1
            if count in l:
                continue
            else:
                b.write(line)
    for i in l:
        sys.stdout.write("
 ##########正在删除第%s行#########" % i)
        sys.stdout.flush()
        time.sleep(1)
    exit(print('
 再见！'))

arg = {'backend': 'www.oldboy.org','record':{'server':'10.10.0.10 10.10.0.10',"weight":"9999", "maxconn": "33333333333"}}

while True:
    choice = eval(input("请输入一个字典{}：").strip())
    with open( "haproxy.conf",'r') as a,open("b.txt",'w') as b:
      for line in a:
            if line.startswith("backend") and choice["backend"] in line:
                continue
            if choice["record"]['server'] in line:
                continue
            else:
                b.write(line)

 删2：

　　

count=0
while True:
    with open( "haproxy.conf",'r') as a:
        for i in a:
            count+=1
            print(i,count)
        else:
            count=0
            print(count)
    choice=int(input("请输入删除的行："))
    print(choice)
    with open( "haproxy.conf",'r') as a,open("b.txt",'w') as b:
        for line in  a:
            count+=1
            if count==choice:
                continue
            else:
                b.write(line)

 改

count=0
while True:
    choice=eval(input("请输入一个字典{}")) # choice=eval(input("请输入一个字典{}"))
    with open( "haproxy.conf",'r') as a,open("b.txt",'w') as b:
        for line in a:
            count+=1
            if count==28:
                b.write(str(choice["backend"]).strip())
                continue
            if count==29:
                b.write("
")
                continue
            if count==30:
                for k,v in dict(choice['record']).items():
                  b.write('    ') 
                  b.write(k)
                  b.write("   ")
                  b.write(v)
                continue
            if count==31:
                b.write("
")
                continue
            else:
                b.write(line)

查

while True:
    l=[]
    m=input("请输入您要查询的内容： ").strip()
    flag=False
    with open('haproxy.conf','r') as  ha1:
        for line in ha1:
            if line.startswith("backend") and m in line:  #第一步 定位到 backend行
                flag=True
                continue
            if flag==True:                                #第二步 设置标志开关
                l.append(line)
            if line.startswith("backend") and flag:      #第三步 跳出循环
                break
        for i in  l:
            print(i)

 用户登录三次锁定:

count=0
while True:
    user=input("请输入您的用户名： ").strip()
    with open("lock_account",'r') as a:
        for i in  a:
           if user==i.strip():
                exit("您的账户已被锁定")
    password = input("请输入密码： ").strip()
    count+=1
    flag = False
    with open("account.txt", 'r') as b:
        for line in b:
           use,psw = line.strip().split()
           if user== use and password==psw:
               count=0
               print("---------欢迎登录-------- ")

    if count==3 and flag==False:
        with open("lock_account", 'a') as a:
            a.write(user)
            a.write('
')
            exit("输入次数超过3次，你的账户被锁定了")

 定义函数精简版

count=0
def open_lockaccount(user):
    with open("lock_account",'r') as a:
        for i in  a:
           if user==i.strip():
                exit("您的账户已被锁定")
def open_account(user,passwd):
    with open("account.txt", 'r') as b:
        for line in b:
           use,psw = line.strip().split()
           if user== use and password==psw:
               count = 0
               print("---------欢迎登录-------- ")
def write_account(user):
    with open("lock_account", 'a') as a:
        a.write(user)
        a.write('
')
        exit("输入次数超过3次，你的账户被锁定了")
while True:
    user=input("请输入您的用户名： ").strip()
    open_lockaccount(user)
    password = input("请输入密码： ").strip()
    count+=1
    flag = False
    open_account(user, password)
    if count == 3 and flag == False:
        write_account(user)