f = open('haproxy.txt', encoding='utf-8')
lines = []
c = 0
d =99999
print("显示所有节点:")
with open('haproxy.txt', encoding='utf-8') as e:
    for line in e:
        pass
        if "backend " in line and "use_backend" not in line:
            print(line)
choose_input = input(
        "1 查询\n"
        "2 修改\n"
        "3 增加\n"
        "4 删除\n"
        "请输入要选择的操作序号[1|2|3|4]:")
if str.isdigit(choose_input):
    choose_input = int(choose_input)
    if choose_input == 1:
        user_input = input("例如www.oldboy.org,手打,不要复制粘贴,因为是网页会出错不是程序的错误\n"
                           "请输入要查询的主机名:")
        a = ("backend %s\n" % user_input)
        for i in f:
            lines.append(i.strip().split())
            c += 1
            if a in i:
                d = c
        f.close()
        print(' '.join(lines[d-1]), "\n", ' '.join(lines[d]))
    if choose_input == 3:
        user_input=input("例如{'bakend': 'www.oldboy.org','record':{'server': '100.1.7.9','weight': 20,'maxconn': 3000}}\n"
                         "请输入要增加的节点：")
        arg=eva l(user_input)
        with open("haproxy.txt","a",encoding="utf-8") as e:
                e.write("bakend ")
                e.write(arg['bakend'])
                e.write("\n        record ")
                e.write(arg['record']['server'])
                e.write(" ")
                e.write(arg['record']['server'])
                e.write(" weight ")
                e.write(str(arg['record']['weight']))
                e.write(" maxconn ")
                e.write(str(arg['record']['maxconn']