问题描述
我正在尝试确定字典中是否存在特定的键和值对;但是，如果我使用contains或has-key方法，则只检查该键。我需要它来检查键和具体值。一些背景：
我们共有4个字典：一个用于A，B，CompareList和ChangeList。一旦A被初始化，我将A的内容放入CompareList（我将直接比较它们;但是A和B是双重哈希表，我已经尝试了所有这些方法，但没有一个可以为我工作）。所以一旦我们把A放在CompareList中，我将它与B中的ObjectAttributes字典进行比较，看看是否有任何改变。所以例如，B可能有键，值对形状：圆和填充：否。如果CompareList具有形状：circle和fill：是的，那么我只想填充：yes是ChangeList。问题在于if attributes.getName（）不在self.CompareList：行中。这是代码;我在Python 2.7.8上运行它。提前感谢任何帮助!!
I am trying to determine if a specific key and value pair exist in a dictionary; however, if I use the contains or has-key method, it only checks for the key. I need it to check both the key and the specific value. Some background:We have a total of 4 dictionaries: one for A, B, CompareList, and ChangeList. Once A is initialized, I put A's contents into CompareList (I would compare them directly; but A and B are double hash tables. And I've tried all of the methods here; but none of them work for me). So once we put A into CompareList, I compare it with the ObjectAttributes dictionary in B to see if anything changed. So for example, B may have the key,value pairs shape:circle and fill:no. If CompareList had shape:circle and fill:yes, then I want only fill:yes to be ChangeList. The problem lies in the "if attributes.getName() not in self.CompareList:" line. Here is the code; I am running it on Python 2.7.8. Thanks in advance for any help!!
class ObjectSemanticNetwork:
def __init__(self):
self.ObjectNames = {}
self.ObjectAttributes = {}
def setName(self, name):
self.ObjectNames[name] = self.ObjectAttributes
def setData(self, name, attribute):
self.ObjectAttributes[name] = attribute
def checkData(self, key):
print(key)
for key, value in self.ObjectAttributes.iteritems():
print(key)
print(value)
print("\n")
class Agent:
(self):
self.CompareList = {}
self.ChangeListAB = {}
self.ChangeListCD = {}
def addToCompareList(self, name, value):
self.CompareList[name] = value
def addToChangeListAB(self, name, value):
self.ChangeListAB[name] = value
def addToChangeListCD(self, name, value):
self.ChangeListCD[name] = value
def CheckList(self, List, ListName):
print '-------------------------',ListName,'--------------------------------'
for key, value in List.iteritems():
print(key)
print(value)
def Solve(self,problem):
OSNAB = ObjectSemanticNetwork()
for object in problem.getFigures().get("A").getObjects():
for attributes in object.getAttributes():
self.addToCompareList(attributes.getName(), attributes.getValue())
OSNAB.ObjectNames["A"] = OSNAB.setData(attributes.getName(), attributes.getValue())
#OSNAB.checkData("A")
self.CheckList(self.CompareList,"CompareList")
for object in problem.getFigures().get("B").getObjects():
for attributes in object.getAttributes():
if attributes.getName() not in self.CompareList:
self.addToChangeListAB(attributes.getName(), attributes.getValue())
OSNAB.ObjectNames["B"] = OSNAB.setData(attributes.getName(), attributes.getValue())
# OSNAB.checkData("B")
self.CheckList(self.ChangeListAB,"ChangeList")
OSNCD = ObjectSemanticNetwork()
for object in problem.getFigures().get("C").getObjects():
for attributes in object.getAttributes():
OSNCD.ObjectNames["C"] = OSNCD.setData(attributes.getName(), attributes.getValue())
# OSNCD.checkData("C")
for object in problem.getFigures().get("1").getObjects():
for attributes in object.getAttributes():
OSNCD.ObjectNames["D"] = OSNCD.setData(attributes.getName(), attributes.getValue())
# OSNCD.checkData("D")
return "6"
推荐答案
这个功能如何：
def checkKeyValuePairExistence(dic, key, value):
try:
return dic[key] == value
except KeyError:
return False
如果你正在使用其他类型的字典，那么一个python提供（对不起，我不明白你的帖子，如果你使用它）然后让我知道，我会尝试给您另一种解决方案
If you are using another type of dictionary other then the one python offers (I'm sorry, I couldnt understand from your post if you are using it or not) then let me know and i'll try to give your another solution
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