名片管理系统操作

user_list=[
{“name”:“龙傲天”,“age”:“18”,“tel”:19951753789},
{“name”:“叶良辰”,“age”:“21”,“tel”:15852945530},
{“name”:“赵日天”,“age”:“30”,“tel”:18115171935}
]
def user_add():
name = input(“请输入用户姓名:”)
for i in user_list:
if name= =i[“name”]:
print(“用户名已经存在”)
return
age=input(“请输入用户年龄”)
tel=input(“请输入用户电话”)
dict01={“name”:name,“age”:age,“tel”:tel}
user_list.append(dict01)
def user_del():
try:
index=int(input(“请输入要删除的序号:”))
except Exception as e: # Exception 例外
print(“输入的数字不合法”)
if 0<=index<len(user_list):
answer=input(“确认要删除吗?yes or no”)
if answer==“yes”:
user_list.pop(index)
else:
pass
else:
print(“输入的用户序号不存在”)

def user_update():
try:
index=int(input(“请输入要更改的序号:”))
except Exception as e: # Exception 例外
print(“输入的数字不合法”)
if 0<=index<len(user_list):
new_name=input(“请输入用户名”)
new_age=input(“请输入年龄”)
new_tel=input(“请输入电话”)
user_list[index][“name”]=new_name
user_list[index][“age”]=new_age
user_list[index][“tel”]=new_tel
else:
print(“输入的长度不在范围内”)

def user_select():
try:
index=int(input(“请输入要查询的序号:”))
except Exception as e: # Exception 例外
print(“输入的数字不合法”)
if 0<=index<len(user_list):
print(user_list[index])
else:
print(“输入的长度不在范围内”)

def show_all():
print(“显示所有名片”)
def exit_system():
answer=input(“是否确定退出,yes or no”)
if answer.lower()==“yes”:
import sys
sys.exit()

def starte():
while True:
print("-------\n 1:添加名片 \n2:删除名片 \n3:修改名片 \n4:查询名片 \n5:显示所有名片 \n6:退出系统\n-------")
operation=int(input(“请输入要执行的操作(数字):”))
if operation = =1:
return user_add()
elif operation= =2:
return user_del()
elif operation= =3:
return user_update()
elif operation= =4:
return user_select()
elif operation= =5:
return show_all()
elif operation= =6:
return exit_system()
else:
print(“出错了,请重新输入”)

if name == ‘main’:
starte()
print(user_list)