pythonプログラミング入門から実践第六章辞書

#        
alien_0={'color':'green','points':'5'}
print(alien_0['color'])
print(alien_0['points'])

#6.2     
##        —  ，           ，，，          ， —         ，

#6.2.1        
print(alien_0['color'])
##          ，                ，，     alien_0  ‘color’  

new_points=alien_0['points']
print("you just earned "+ str(new_points)+" points!")

#6.2.2    —  
alien_0={'color':'green','points':'5'}
print(alien_0)
alien_0['x_position']=0
alien_0['y_position']=25
print(alien_0)
##       

#6.2.3         
alien_0={}
alien_0['color']='green'
alien_0['points']=6
print(alien_0)

#6.2.4        
alien_0={'color':'green'}
print(alien_0)
print("    ")
alien_0['color']='yello'
print(alien_0)

alien_0={'x_position':0,'y_position':25,'speed':'medium'}
print('original x_position is '+str(alien_0['x_position']))
if alien_0['speed']=='slow':
    x_increment=1
elif alien_0['speed']=='medium':
    x_increment=2
else:
    x_increment=3
alien_0['x_position']=alien_0['x_position']+x_increment
print("new x_position is "+str( alien_0['x_position']))
##           ，    x,y  ，   ，， if-elif-else            ，        x_increment，           x_position ，

#6.2.5    —  
alien_0={'color':'green','points':'5'}
print(alien_0)
del alien_0['points']
print(alien_0)
##del        —  

#6.2.6           
favorite_languages={
        'jen':'python',
        'sarah':'c',
        'daming':'java',
        'sam':'c++',
}
##              ，   —        ，       ，               
print("sam's favorite language is "+ favorite_languages['sam'].title()+' .')

#6.3     
#6.3.1        —  
user_0={
    'username':'luluhuang',
    'first':'lulu',
    'last':'huang',
}
for key,value in user_0.items():
    print("
key: "+key)
    print("value: "+value)
## for        —             ，             ，
##              
##         item()      (Dictionary) items()            ( ,  )     

#6.3.2          
favorite_languages={
        'jen':'python',
        'sarah':'c',
        'daming':'java',
        'sam':'c++',
}
for name in favorite_languages.keys():
    print(name.title())
## for               ，           name ，   keys()    for name in favorite_languages     
##     keys()           
friends=['phil','sarah']
for name in favorite_languages.keys():
    print(name.title())
    if name in friends:
        print("  hi "+name.title()+" , i see your favorite language is "+favorite_languages[name].title()+"!")
##   keys()                  ，
if 'erin' not in favorite_languages.keys():
    print("erin, please take your poil!")

# 6.3.3             
favorite_languages={
        'jen':'python',
        'sarah':'c',
        'daming':'java',
        'sam':'c++',
}
for name in sorted(favorite_languages.keys()):
    print(name.title()+", thank you! ")
##  for            ，  sorted()          ，        ，

# 6.3.4          
print("the following languages have been mentioned:
")
for language in favorite_languages.values():
    print(language.title())
##   value()，       ，

for language in set(favorite_languages.values()):
    print(language.title())

##   set     ，            ，

#6.4   
# 6.4.1     
alien_0={'color':'green','points':'5'}
alien_1={'color':'yellow','points':'10'}
alien_2={'color':'red','points':'15'}

aliens=[alien_1,alien_1,alien_2]
for alien in aliens:
    print(alien)
print("
")
##          ，            ，              ，，          
aliens=[]
##                
for alien_number in range(30):  ##  30    
    new_alien={'color':'green','points':'5','speed':'slow'}
    aliens.append(new_alien)
##        
for alien in aliens[:5]:
    print(alien)
print('...')
##           
print("totle number of aliens : "+str(len(aliens)))
## range()        ，         ，     ，        ，        aliens   ，
##         5      
aliens=[]
##                
for alien_number in range(30):  ##  30    
    new_alien={'color':'green','points':'5','speed':'slow'}
    aliens.append(new_alien)
for alien in aliens[:3]:
    if alien ['color']=='green':
        alien['color']='yellow'
        alien['points']='5'
        alien['speed']='medium'
##        
for alien in aliens[:5]:
    print(alien)
print('...')
##           
print("totle number of aliens : "+str(len(aliens)))

aliens=[]
##                
for alien_number in range(30):  ##  30    
    new_alien={'color':'green','points':'5','speed':'slow'}
    aliens.append(new_alien)
for alien in aliens[0:3]:
    if alien['color']=='green':
        alien['color']='yellow'
        alien['points']='5'
        alien['speed']='medium'
    elif alien['color']=='yellow':
        alien['color'] = 'red'
        alien['points'] = '15'
        alien['speed'] = 'max'
##        
for alien in aliens[0:5]:
    print(alien)
print('...')
##           
print("totle number of aliens : "+str(len(aliens)))

#        
pizza={
    'crust':'thick',
    'topping':['mushrooms','extra cheese'],
}
print("you ordered a "+pizza['crust']+"-crust pizza "+"with the following tippings: ")
for topping in pizza['topping']:
    print("\t"+topping)
##        ，              ， for        ，   'topping'          
##                  ，             
favorite_languages={
        'jen':['python','ruby'],
        'sarah':['c'],
        'daming':['java','go'],
        'sam':['c++','python'],
}
for name,languages in favorite_languages.items():
    print("
"+name.title()+"'s favorite languages are: ")
    for language in languages:
        print('\t'+language.title())

# 6,4.3        
users={
    'daming':{
        'first':'daming',
        'last':'li',
        'location':'princeton',
    },
    "lingling":{
        'first': 'lingling',
        'last': 'huang',
        'location': 'paris',
    },
}
for username,user_info in users.items():
    print("
username: "+username)
    full_name=user_info['first']+" "+user_info['last']
    location=user_info["location"]

    print("\tfull name: "+full_name.title())
    print("\tlocation: "+location.title())