python 学习笔记学生信息在线管理

#学员信息在线管理系统

#定义一个用于存放学员信息的  列表  变量
stulist=[
	{"name":"zhangsan","age":20,"classnum":"py1"},
	{"name":"lisi","age":21,"classnum":"py2"},
	{"name":"wangwu","age":22,"classnum":"py3"}]

#定义一个学生信息的输出函数
def showstu(stulist):
	'''
	学生信息的输出函数
	'''
	
	if len (stulist)==0:
		print ("==================无学员信息！======================")
		return
	print ("|{0:<5} | {1:<10} | {2:<5} | {3:<10}|".format("sid","name","age","classnum"))
	print ("-"*50)
	for i in range(len(stulist)):
		print ("|{0:<5} | {1:<10} | {2:<5} | {3:<10}|".format(i+1,stulist[i]["name"],stulist[i]["age"],stulist[i]["classnum"]))



while True:
	print ("="*14,"学员信息在线管理系统","="*14)
	print ("{0:1}{1:18}{2:18}".format(" ","1.查看学员信息","2.添加学员信息"))
	print ("{0:1}{1:18}{2:18}".format(" ","3.删除学员信息","4.退出操作"))
	print ("="*50)

	key = input("请输入对应的选择：")

	if key == "1":
		print ("="*14,"学员信息查看","="*22)
		showstu(stulist)
		input("按回车键继续")
	elif key == "2":
		print ("="*14,"学员信息添加","="*22)
		stu={}
		stu["name"]=input("请输入要添加的学员姓名：")
		stu["age"]=input("请输入要添加的学员年龄：")
		stu["classnum"]=input("请输入要添加的学员班级：")
		stulist.append(stu)
		showstu(stulist)
		input("按回车键继续")
	elif key == "3":
		print ("="*14,"学员信息删除","="*22)
		sid = input("请输入要删除的学员信息id号")
		del stulist[int(sid)-1]
		showstu(stulist)
		input("按回车键继续")
	elif key == "4":
		print ("==================== 再见！ ======================")
		break