P95页嵌套
# 创建空列表用以记录外星人
aliens = []
#创建30个绿色的外星人
for alien_number in range(0,30): 疑问：为何是alien_number？？？
new_alien ={'color':'green','speed':'slow','point':5}
aliens.append(new_alien)
for alien in aliens[0:3]:
if alien['color'] == 'green':
alien['color']='yellow'
alien['speed'] = 'high'
alien['point'] = 10
# 显示前五个
print(aliens[0:5])
print('........')
以上代码进一步拓展
# 创建空列表用以外星人
aliens = []
#创建30个绿色的外星人
for alien_number in range(0,30):
new_alien ={'color':'green','speed':'slow','point':5}
aliens.append(new_alien)
for alien in aliens[0:3]:
if alien['color'] == 'green':
alien['color']='yellow'
alien['speed'] = 'high'
alien['point'] = 10
elif alien['color'] == 'yellow':#将上面if下的黄色的外星人改为红色.....
alien['color'] = 'red'
alien['speed'] = 'fast'
alien['point'] = 15
# 显示前五个
print(aliens[0:5])
print('........')
P96例1
# 存储所有披萨信息
pizza = {
'Crust':'thick',
'topping':['mushroom','extra cheese']
}#字典中的键值对的值可以是列表：'topping':['mushroom','extra cheese']
# 描述所点的披萨
print(' You order a '+ pizza['Crust'] +'- crust pizza '+
'with the flowing toppings:')
for topping in pizza['topping']:
print("\t"+topping) #制表符【\t】
#知识点：访问字典中的键名——pizza['Crust']、制表符\t的使用
#P96例二
favorite_language = {
'jen':['python','Ruby'],
'sarah':['C'],
'edward':[' Ruby','GO'],
'phil':['c++','python'],
}
for name,languages in favorite_language.items():#在items一定不能少了s
print('\n' + name.title() + "'s favorite languages are:")
for language in languages:
print( "\t"+ language.title())#for循环与print联合使用达到循环打印
#知识点：字典键值对一起访问使用方法【.items()】
"""循环若第n行紧接着下一行是缩进，那么第n+1属于第n行，例如
#for language in languages:
print( "\t"+ language.title())第二行属于第一行的for循环中
"""
#P97 在字典中存贮字典
users = {
'jocker':{'first_name':'li','last_name':'kunhai','age':25},
'Albert':{'first_name':'zhou','last_name':'bangqin','age':38},
}
for user_name,user_information in users.items():
#键放在user_name值放在user_information中
print("\nUser_name " + user_name)
full_name = user_information['first_name'] + "" + user_information['last_name']
print('\tfull_name ' + full_name.title())
P100用户输入和while循环
例子
"""
numbers = input('pleas, input number:' )
if int(numbers) <= 45:
print('you are 6666!!!....')
#运行结果：pleas, input number:25
you are 6666!!!....
"""
例子
"""
#请求用户输入一条信息，并打印该条信息
massage = input('tell sometion,and I will repeat it bakck to you: ')
#input括号内的提示语：要规范\易于明白
print(massage)
"""
例子：
"""
name = input("pleas enter your name: ")
print('hollo!!!'+ name + " you are 6666!!!!")
"""
例子
"""
#编写清晰的代码
name = input('A') #如果A较长，可以先存贮在一个变量中
print(A)
改进例子如下所示：
"""
"""
prompt = "If you tell us who you are, we can personalize you see."
prompt += "\n what is you first name?: " # prompt += 表示在prompt后面追加字符串。
name = input(prompt)
print('\n Hello '+ name + '！')
错误例子
"""
#P102用input获取输入值并用int()来将输入的值转化为数值
age = input("how old are you? :")
input = int(age)
"""
age = input("how old are you? :")
if age < 25: #该句语法错误
print("...........")
#错误：TypeError: '<' not supported between instances of 'str' and 'int'
#因为age < 25中，age为字符串而不能与数值作比较大小
例子P103#求模量运算符
4 % 3
1
5 % 3
2
6 % 3
0
7 % 3
1
8 % 3
2
例子：
"""
P102用if和else根据不同身高判断以输出不同信息
height = input("How tall are you? :") #用清晰简明的提示以请求用户输入
height = int(height) #把用户用户输入的字符串转化为数值（默认输入为字符串）
if height >= 36:
print('\n you are tall enough to ride !') #if满足执行该代码
else:
print("you will be able to ride when you are a little older.") #if不满足执行该行
"""
例子：
"""
P103判断是偶数还是奇数，并根据判断结果输出信息
number = input("Enter a number ,and I will tell you If it's odd or even: ")
number = int(number)
if number %2 == 0:
print("\n it's even.")
else:
print("n\ it's odd.")