使用Python获取字典键对应值的两种方法
作者:Nurbiya_K 时间:2022-08-04 05:25:16
有两种方法
当知道字典的键时:
unit_rooms={ 3:{301:[1,80],302:[1,80],303:[2,90],304:[2,90]},
4:{401:[1,80],402:[1,80],403:[2,90],404:[2,90]},
5:{501:[1,80],502:[1,80],503:[2,90],504:[2,90]}
}
for i in range(3,6):
rooms=unit_rooms[i]
print(rooms)
运行结果:
当不知道字典的键时:
unit_rooms = {3:{301:[1,80],302:[1,80],303:[2,90],304:[2,90]},
4:{401:[1,80],402:[1,80],403:[2,90],404:[2,90]},
5:{501:[1,80],502:[1,80],503:[2,90],504:[2,90]}
}
for rooms in unit_rooms.values():
print(rooms)
运行结果:
获取字典的值:
for value in DictName.values():
# value的名字可以自行另取
# DictName是要遍历的字典的名称
# .values():是固定的用法
获取键值:
for k,v in DictName.items():
#遍历字典的键值对,k对应键,v对应值
#k,v 的名字可以自己取,DictName是字典名
unit_rooms = {3:{301:[1,80],302:[1,80],303:[2,90],304:[2,90]},
4:{401:[1,80],402:[1,80],403:[2,90],404:[2,90]},
5:{501:[1,80],502:[1,80],503:[2,90],504:[2,90]}
}
for sub_dict in unit_rooms.values():
# 遍历大字典的值,即小字典sub_dict
for room,info in sub_dict.items():
print('房间号:%d,方向:%d,面积:%d'%(room,info[0],info[1]))
运行结果:
方向1代表南北,方向2代表东西
把数字替换掉:
unit_rooms = {3:{301:[1,80],302:[1,80],303:[2,90],304:[2,90]},
4:{401:[1,80],402:[1,80],403:[2,90],404:[2,90]},
5:{501:[1,80],502:[1,80],503:[2,90],504:[2,90]}
}
for sub_dict in unit_rooms.values():
for room,info in sub_dict.items():
dire = ['', '南北', '东西']
#建立一个列表,第0个元素为空,第1个元素为'南北',第2个元素为'东西'
print(dire[info[0]])
举例:
unit_rooms = {3:{301:[1,80],302:[1,80],303:[2,90],304:[2,90]},
4:{401:[1,80],402:[1,80],403:[2,90],404:[2,90]},
5:{501:[1,80],502:[1,80],503:[2,90],504:[2,90]}
}
for sub_dict in unit_rooms.values():
for room,info in sub_dict.items():
dire = ['', '南北', '东西']
print('户室号:%d 朝向:%s 面积:%d' % (room,dire[info[0]],info[1]))
运行结果:
附:字典dic最大值对应的键
步骤:(1)用max()函数找出最大的值maxValue;(2)套用一的自定义函数
def getKey(dic, value):
if value not in dic.values():
return None
result = set()
for key in dic:
if dic[key]==value:
result.add(key)
return result
dic = {'a':2, 'b':1, 'c':10, 'd':10}
maxValue=max(dic.values())
result = getKey(dic,maxValue)
>> {'c','d'}
来源:https://blog.csdn.net/Nurbiya_K/article/details/104650418
标签:python,字典键,对应值
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