import time
num = 0
while True:print(num)num += 1time.sleep(1)

for letter in 'Python':     # continue第一个实例if letter == 'h':continueprint('当前字母 :', letter)var = 10                    # continue第二个实例
while var > 0:var = var -1if var == 5:continueprint('当前变量值 :', var)
print("Good bye!")count = 0        #break实例
while True:print(count)count+=1if count == 5:break

import random
WIN=0
lose=0
draw=0
while True:print('==========欢迎来猜拳==========')print('WIN:%s lose:%s draw:%s' % (WIN,lose,draw))print('1.石头','2.剪刀','3.布','4.退出')hum_choose=input('==>：')computer_choose=random.choice(['石头','剪刀','布'])#胜利if hum_choose== '1' and computer_choose=='剪刀' or hum_choose=='2'and computer_choose=='布' or hum_choose=='3' and computer_choose=='石头':print('you WIN!!!')WIN+=1#失败elif hum_choose=='3' and computer_choose=='剪刀' or hum_choose=='1' and computer_choose=='布' or hum_choose=='2' and computer_choose=='石头':print('you lose')lose+=1#平局elif hum_choose=='2' and computer_choose=='剪刀'or hum_choose=='3' and computer_choose=='布' or hum_choose=='1' and computer_choose=='石头':print('you draw')draw+=1#退出游戏elif hum_choose=='4':print('gameover')breakelse:print('input error')

l1 =[]
info ={}
while True:print('=' * 60)print('名片管理系统')print('1.查询  2.添加  3.修改  4.删除  5.定点查询  6.退出  ')choose = input('请输入选项：').strip()# 查询if choose == '1':if l1:i = 1while i < len(l1)+1:print('%s.姓名：%s 年龄：%s 电话：%s' % (i,l1[i-1]['name'],l1[i-1]['age'],l1[i-1]['phone']))i += 1else:print('当前名片为空')# 添加elif choose == '2':name = input('姓名：').strip()age = input('年龄：').strip()phone = input('电话：').strip()if name and age and phone:info = {'name':name,'age':age,'phone':phone}l1.append(info)else:print('请输入相应的信息')# 修改elif choose == '3':j = 1while j < len(l1)+1:print('%s.姓名：%s 年龄：%s 电话：%s' % (j,l1[j-1]['name'],l1[j-1]['age'],l1[j-1]['phone']))j += 1update = input('请输入需要修改的名片：').strip()if update:if int(update) < len(l1)+1:u_name = input('修改的姓名：').strip()u_age = input('修改的年龄：').strip()u_phone = input('修改的电话：').strip()if u_name:l1[int(update)-1]['name'] = u_nameif u_age:l1[int(update)-1]['age'] = u_ageif u_phone:l1[int(update)-1]['phone'] = u_phoneprint('姓名：%s 年龄：%s 电话：%s' %(l1[int(update)-1]['name'],l1[int(update)-1]['age'],l1[int(update)-1]['phone']))else:print('没有该名片')else:print('警告：没有输入需要修改的名片！')# 删除elif choose == '4':delete = input('请输入需要删除的名片：').strip()if delete:if int(delete) < len(l1)+1:l1.remove(l1[int(delete)-1])else:print('没有该名片')else:print('警告：没有输入需要删除的名片！')# 定点查询elif choose == '5':q = input('请输入指定的名片：').strip()if q:if int(q) < len(l1)+1:print('姓名：%s 年龄：%s 电话：%s' % (l1[int(q)-1]['name'],l1[int(q)-1]['age'],l1[int(q)-1]['phone']))else:print('没有该名片')else:print('警告：没有输入指定的名片！')# 退出elif choose == '6':print('欢迎下次使用')breakelse:print('输入错误')