[已解决]关于items()获取字典的键值对的问题

pionrrt

想问一下，为什么这里会有报错

#create a mapping of state to abbreviation
state={"Oregon":"OR","Florida":"FL","California":"CA","New York":"NY","Michigan":"MI"}
#create a basic set of states and some cities in them
cities={"CA":"San Francisco","MI":"Detroit","FL":"Jacksonville"}
#add some more cities
cities["NY"]="New York"
cities["OR"]="Portland"
#print out some cities
print("-"*10)
print("NY State has:",cities["NY"])
print("OR State has:",cities["OR"])

#print some states
print("-"*10)
print("Michigan's abbreviation is:",state["Michigan"])
print("Florida's abbreviation is:",state["Florida"])

#print every state abbreviation
print("-"*10)
for state,abbrev in state.items():
    print("%s is abbreviated %s"%(state,abbrev))
    
#print every city in state
print("-"*10)
for abbrev,city in cities.items():
    print("%s has the city %s"%(abbrev,city))
    
#now do both at the same time
print("-"*10)
for state,abbrev in state.items():
    print("%s state is abbreviated %s and has city %s"%(state,abbrev,cities[abbrev]))
print("-"*10)

#safely get a abbreviation by state that might not be there

state=state.get("Texas",None)

if not state:
    print("Sorry, no Texas.")
#get a city with a default value
city=cities.get("TX","Does Not Exist")
print('''The city for the state "TX" is :%s'''%city)

最佳答案

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suchocolate

2023-6-14 13:12:09

for里的变量和state字典同名了。这样用：

states={"Oregon":"OR","Florida":"FL","California":"CA","New York":"NY","Michigan":"MI"}  # 变成复数
for state,abbrev in states.items():
    print("%s is abbreviated %s"%(state,abbrev))

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suchocolate

for里的变量和state字典同名了。这样用：

states={"Oregon":"OR","Florida":"FL","California":"CA","New York":"NY","Michigan":"MI"}  # 变成复数
for state,abbrev in states.items():
    print("%s is abbreviated %s"%(state,abbrev))