Python Day1
# print ("hello world!")#Ctrl+B配置后输出
#常量直接大写
# for value in range(1,5):#shift+ctrl+/快速注释
# print(value)
# for value in range(5):
# print(value)
# number=list(range(5))
# print(number)
#输出一个乘方列表
# squares=[]
# for value in range(1,11):
# squares.append(value**2)
# print(squares)
# number=list(range(1,5))
# print(number)
# digits=[1,2,3,4,5,6,7,8,9,0]
# print(sum(digits))
# min(digits)
# max(digits)
# squares=[value**2 for value in range(1,11)]
# print(squares)
# players=['A','B','C','D','E']切片
# print(players[1:4])
# print(players[:4])
# print(players[1:])
# names=['lin','jiang','hao','guo','liu']
# for name in names[1:4]:
# print(name.title())
#复制列表
# my_foods=['A','B','C','D','E']
# myfriends_foods=my_foods[:]
# print(my_foods)
# myfriends_foods.append('F')
# print(myfriends_foods)
#P57课后作业
#遍历输出前三个/中间元素
# subjects=['chinese','english','math','art','physics']
# print("The first three items in the list are:")
# for subject in subjects[1:4]:
# print(subject.title())#upper/lower
#if语句
#在python中用冒号：来代替形如c语言中的{}，且覆盖区域需要在下一行进行缩进！
# names=['zhangsan','lisi','wangwu','zhaoliu']
# for name in names:
# if name=='lisi':
# print(name.upper())
# else:
# print(name.title())
# libohao='huairen'
# if libohao != 'haoren':
# print("libohao is headbroken! ")
# alien_color='green'
# if alien_color =='yellow':
# print("The player get 5 points!")
# else :
# # print("The player get 1 point!")
# alien_colors=['yellow','green','blue','red']
# alien_color='yellow'
# if alien_color in alien_colors:
# print("There is a yellow alien")
# if 'green' in alien_colors:#elif 跳过
# print("There is a green alien")
# if 'blue' in alien_colors:#elif
# print("There is a blue alien")
# # if:/else:
# print("There is a red alien")
#点菜点菜
# available_toppings=['mushrooms','olives','green peppers','pepperoni','pineapple','extra cheese']
# requested_toppings=['mushrooms','french fries','extra cheese']
# for requested_topping in requested_toppings:
# if requested_topping in available_toppings:
# print(f"Adding {requested_topping}--")
# else:
# print(f"Sorry,we do not have {requested_topping}")
# print("Finished making your pizza!")
#字典/键值对{'color':'blue','point':5}
# alien_0={}
# alien_0['color']='blue'
# alien_0['point']=5
# print(alien_0)
# alien_0={
# 'linshujin':24,
# 'linjinzhi':22,
# 'liuchangjiang':23,
# 'liuzhuang':23,
# }
# age=alien_0.get('haoshuai','no name has been find!')#用get方法来避免空值错误，第一个参数是指定值（必需），第二个参数用来调整默认参数（可选）
# print(f"linshujin is {alien_0['linshujin']}")
# print(age)
#遍历字典
# for key,value in alien_0.items():
# print(f"{key}'s age is {value}")
# for name in alien_0.keys():#仅遍历键/遍历值
# for age in alien_0.values():
# print(f"{name}")
# #顺序遍历/sorted临时排序
# subjects={
# 'math':'数学',
# 'english':'英语',
# 'chinese':'语文',
# 'enl':'英语',
# }
# # for subject in sorted(subjects.keys()):
# # print(subject)
# for subject in set(subjects.values()):
# print(subject)#set集合存储的元素不会重复但是是随机顺序
#字典嵌套
# aliens=[]
# #创建30个绿色外星人
# for alien_number in range(30):
# new_alien={'color':'green','point':5,'speed':'slow'}
# aliens.append(new_alien)
# #外星人变化
# for alien in aliens[:3]:
# if alien['color']=='green':
# alien['color']='yellow'
# alien['point']=10
# alien['speed']='fast'
# #输出前五个外星人
# for alien in aliens[:5]:
# print(alien)
# print("-----------------------------------------------")
# print(f"The total number is {len(aliens)}")
#在字典中存储列表
# pizza={
# 'crust':'thick',
# 'toppings':['mushrooms','extra cheese'],
# }
# print(f"You order a {pizza['crust']} pizza with the following toppings:")
# for topping in pizza['toppings']:
# print("\t"+topping)
# favorite_subject={
# 'linshujin':['english','chinese','math'],
# 'linjinzhi':['chinese','math','PE'],
# 'liuchangjiang':['math','art'],
# 'liuzhuang':['physics'],
# }
# for name,subjects in favorite_subject.items():
# print(f"{name}'s favorite subjects are:")
# for subject in subjects:
# print(subject)
#在字典中嵌套字典
users={
'linshujin':{
'age':24,
'hometown':'fujian',
'favorite_subject':'math',
},
'liuchangjiang':{
'age':23,
'hometown':'hebei',
'favorite_subject':'english',
}
}
# for user,user_info in users.items():
# print(f"Username: {user.title()}")
# age=user_info['age']
# hometown=user_info['hometown']
# favorite_subject=user_info['favorite_subject']
# print(f"\tAge:{str(age)}")
# print(f"\tHometown:{hometown.title()}")
# print(f"\tFavorite subject:{favorite_subject.title()}")
#用户输入/需要加载sublime的扩展SublimeREPL
#配置快捷键Preferences/Key Bindings/.../ctrl+m直接运行交互程序
#ctrl+b default
# name=input("Please input your name: ")输入数字时用int()转换
# print(f"\nWelcome {name}")
#求模运算
# number=input("Enter a number,and i'll tell you if it's even or odd: ")
# number=int(number)
# if number%2==0:
# print(f"\nThe number {number} is a even.")
# else:
# print(f"\nThe number {number} is a odd.")
#while循环
# number=1
# while number<=5:
# print (number)
# number+=1
#这里的prompt其实就是Input（）中的提示词，其实可以省略
# prompt ="\nTell me something ,and i will repeat it to you:"
# prompt +="\nEnter 'quit' to end the program."
# # message=""
# # while message!='quit':
# # message=input(prompt)
# # if message != 'quit':
# # print(message)#记得缩进！不缩进python没法判断生效区域！！！
# active=True#标记
# while active:
# message=input(prompt)
# if message=='quit':
# active=False
# else:
# print(message)
# prompt="\nPlease enter the name of city you have visited:"
# prompt+="\n(Enter 'quit' when you are finished.)"
# message=""
# active=True
# while active:
# message=input(prompt)
# if message=='quit':
# break
# else:
# print(message)
#continue
# current_number=0
# while current_number<10:
# current_number+=1
# if current_number%2==0:
# continue
# else:
# print(current_number)
#使用while循环来处理列表和字典
#在列表之间移动元素
# unconfirmed_users=['zhangsan','lisi','wangwu','zhaoliu']
# confirmed_users=[]
#认证用户中----------
#列表pop()删除并返回列表中的最后一个元素
# while unconfirmed_users:
# verifying_user=unconfirmed_users.pop()
# print(f"Verifying user:{verifying_user}")
# confirmed_users.append(verifying_user)
# #输出全部已认证用户
# print("All confirmed users are follows:")
# for confirmed_user in confirmed_users:
# print(confirmed_user.title())
#使用用户输入来填充字典内容
#新建一个字典用来存储用户输入的信息
responses={}
active=True
while active:
name=input("Please input your name:")
age=input("Please input your age:")
responses[name]=age
repeat=input("Would you like to let another person respond?(Yes/No)")
if repeat=='No':
active=False
print("-------------------research done--------------------")
for name,age in responses.items():
print(f"{name} is {age} years old.")