python3 文件增删查

#Author by Andy
#_*_ coding:utf-8 _*_
import sys
import time
Path="E:my python study\fileshaproxy.txt"
Path_new="E:my python study\fileshaproxy_new.txt"
examples='''33[31;1m内容格式范例 :
    arg={
'backend': 'www.oldgirl.org',
    'record':{
    'server': '100.1.7.10',
    'weight': 20,
    'maxconn': 30
    }
}
33[;0m'''
#定义主函数
def main_func():
    print("Welcome to use this program!")
    choice=input("See what you can do:
"
          "Add
"
          "Delete
"
          "Q or q to end program.
"
          "Search
"
          ":")
    return choice
#定义字符串转字典函数
def str_to_dict():
    print("请输入要添加的内容：")
    stop_input = ''
    user_input = ''
    for line in iter(input,''):
        user_input = user_input+line + '
'   #input遇到空行才停止，默认是遇到回车停止
    dict = eval(user_input.strip("arg = "))
    return dict
#定义追加函数
def add(info):
    backend_value=info['backend']
    record_value=info['record']
    f=open(Path,'a+',encoding='utf-8')
    f.write('
backend %s 
' %backend_value)
    f.write('		server %s weight %s maxconn %s
'
            %(record_value['server'],record_value['weight'],record_value['maxconn']))
    time.sleep(2)
    f.closed
# add(str_to_dict())
#定义删除函数
def dele(info):
    backend_value=info['backend']
    record_value=info['record']
    del_record='		server %s weight %s maxconn %s
'  
               %(record_value['server'],record_value['weight'],record_value['maxconn'])
    f = open(Path,'r+',encoding='utf-8')
    f_new=open(Path_new,'w',encoding='utf-8')
    for line in f:
        if backend_value in line:
            line=line.replace(line,'')
        elif del_record == line:
            line=line.replace(del_record,'')
        f_new.write(line)
    time.sleep(2)
    f.closed
    f_new.closed
#dele(str_to_dict())

def find_keywords(keywords):
    f=open(Path,'r+',encoding='utf-8')
    while True:
        line = f.readline()
        if keywords in line:
            f.seek(f.tell()+1)
            print(f.readline().strip())
            target=f.readline().strip()
            time.sleep(2)
            f.closed
            return target
while True:
    choice=main_func()
    if choice=='Add':
        print(examples)
        add(str_to_dict())
    elif choice=='Search':
        keywords=input("请输入关键字：")
        find_keywords(keywords)
    elif choice=='Delete':
        print(examples)
        dele(str_to_dict())
    elif choice=='q'or choice =='Q':
        print("Bye-bye!")
        exit()




文件格式：

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.oldboy1.org
        use_backend www.oldboy1.org if www

backend www.oldboy.org
        server 100.1.7.9 100.1.7.9 weight 20 maxconn 3000

需求：

1、查
    输入：www.oldboy.org
    获取当前backend下的所有记录

2、新建
    输入：
        arg = {
            'bakend': 'www.oldboy.org',
            'record':{
                'server': '100.1.7.9',
                'weight': 20,
                'maxconn': 30
            }
        }

3、删除
    输入：
        arg = {
            'bakend': 'www.oldboy.org',
            'record':{
                'server': '100.1.7.9',
                'weight': 20,
                'maxconn': 30
            }
        }