python作业之修改用户配置文件详解编程语言

#Auther Bob 
#--*--conding:utf-8 --*-- 
name_list = [] 
tmp_list = [] 
info_list = [] 
f = open("homeworkdb","r",encoding="utf-8") 
for line in f: 
    if line.startswith("backend"): 
        tmp_list = (line.strip().split(" ")) 
        # name_list.append(tmp_list[1]) 
        # print(tmp_list) 
        name_list.append(tmp_list[1]) 
 
f.close() 
flag = 0 
# print(name_list) 
while True: 
    option = int(input("1:查询用户信息/n2:删除用户信息/n3:增加用户信息/n4:退出/n")) 
    if option == 1: 
        name = input("please input name:") 
        if name in name_list: 
            with open("homeworkdb","r",encoding="utf-8") as f: 
                for line in f: 
                    if flag == 0 and line.strip() == "backend " + name: 
                        flag = 1 
                        continue 
                    if flag == 1 and not line.startswith("backend"): 
                        info_list.append(line.strip()) 
                    if flag == 1 and line.startswith("backend"): 
                        flag = 0 
                        continue 
                print("%s的信息是：" %(name)) 
                for info in info_list: 
                    print(info) 
                info_list = [] 
        else: 
            print("%s is not in list" %(name)) 
            continue 
    elif option == 2: 
        name = input("please in name:") 
        if name in name_list: 
            with open("homeworkdb","r",encoding="utf-8") as f1,open("tmp","w",encoding="utf-8") as f2: 
                for line in f1: 
                    if flag == 0 and line.strip() == "backend " + name: 
                        flag = 1 
                        continue 
                    if flag == 1 and not line.startswith("backend"): 
                        continue 
                    if flag == 1 and line.startswith("backend"): 
                        flag = 0 
                    if flag == 0: 
                        f2.write(line) 
            with open("homeworkdb","w",encoding="utf-8") as f1,open("tmp","r",encoding="utf-8") as f2: 
                for line in f2: 
                    f1.write(line) 
            name_list.remove(name) 
            with open("homeworkdb","r",encoding="utf-8") as f1,open("tmp","w",encoding="utf-8") as f2: 
                for line in f1: 
                    if line == "/n": 
                        continue 
                    else: 
                        f2.write(line) 
 
            with open("tmp","r",encoding="utf-8") as f1,open("homeworkdb","w",encoding="utf-8") as f2: 
                for line in f1: 
                    f2.write(line) 
        else: 
            print("%s is not in list" %(name)) 
            continue 
    elif option == 3: 
        name = input("please in name:") 
        if name in name_list: 
            print("%s is in list" % (name)) 
            info = input("please input %s is information" % (name)) 
            with open("homeworkdb" ,"r",encoding="utf-8") as f1: 
                for line in f1: 
                    if flag == 0 and line.strip() == "backend " + name: 
                        flag = 1 
                        continue 
                    if flag == 1 and not line.startswith("backend"): 
                        info_list.append(line.strip()) 
                    if flag == 1 and line.startswith("backend"): 
                        flag = 0 
                        continue 
            # print(info_list) 
            if info in info_list: 
                print("%s is already exist" %(info )) 
            else: 
                with open("homeworkdb","r",encoding="utf-8") as f1,open("tmp","w",encoding="utf-8") as f2: 
                    flag = 0 
                    for line in f1: 
                        # print(flag) 
                        if flag == 0 and line.strip() == "backend " + name: 
                            f2.write(line) 
                            tmp_info ="     " + info + "/n" 
                            f2.write(tmp_info) 
                        else: 
                            f2.write(line) 
                with open("tmp","r",encoding="utf-8") as f1,open("homeworkdb","w",encoding="utf-8") as f2: 
                    for line in f1: 
                        f2.write(line) 
        else: 
            print("%s is not in list" %(name)) 
            info = input("please input %s is information" % (name)) 
            with open("homeworkdb","a",encoding="utf-8") as f1: 
                s1 = "/n" + "backend " + name 
                s2 = "/n" + "     " + info 
                f1.write(s1) 
                f1.write(s2) 
                name_list.append(name) 
    elif option == 4: 
        exit() 
    else: 
        print("invalid input,please input[1|2|3|4]") 
        continue