一、取出字典中所有的key-value
student={'name':'xiaoming','age':11,'school':'tsinghua'}
for key,value in student.items():
print(key+':'+str(value))
二、取出字典中所有的keys
people=｛'lifei':'apple','fanming':'peach','gaolan':'banana','hanmeimie':'peach'}
for name in people.keys():
print(name)
**如果想输出按照顺序需要 sorted(people.keys())
三、取出字典中所有的value
people={'lifei':'apple','fanming':'peach','gaolan':'banana','hanmeimie':'peach'}
for fruit in people.values():
print(fruit)