Data format:
The data type is a list, and the index element of the list is a dictionary. A list organized by a dictionary.

Analysis:
1. Traverse the dictionary with the same key, and then get the corresponding value according to the same key.
2. Subtract values to form a new dictionary, redefine the dictionary, or update the existing dictionary.

##The format and example of CRC value comparison are as follows: compare ABCD dict ABCD list (old ABCD dict, new ABCD dict), the form of returned value is the same.
#Old_CRC_Dict = [{'10GE1/0/10':"60"},{'10GE1/0/11':"20"},{'10GE1/0/12':"80"}]
#New_CRC_Dict = [{'10GE1/0/10':"70"},{'10GE1/0/11':"40"},{'10GE1/0/12':"20"}]

The script is as follows:

def Compare_Dict(Old_CRC_DictList,New_CRC_DictList):
    Temp_List=[]
    for x in range(len(Old_CRC_DictList)):
        #print (Old_CRC_DictList[x])
        for y in range(len(New_CRC_DictList)):
            #print (New_CRC_DictList[y])
            Temp_Dict = {}
            for k1,v1 in New_CRC_DictList[y].items():
                #print (k1)
                #print (Old_CRC_DictList[x][k1])
                if Old_CRC_DictList[x].get(k1):
                    Temp_Dict[k1] = int(v1)-int(Old_CRC_DictList[x][k1])
                    #if int(Old_CRC_DictList[x][k1])-int(v1) < 10:
                    #    print ("True")
                    print (Temp_Dict)
                    Temp_List.append(Temp_Dict)
    print (Temp_List)
    return Temp_List

Optimized script:

def Compare_DictList(Old_CRC_DictList,New_CRC_DictList):
    Temp_List=[]
    for x,y in zip(Old_CRC_DictList,New_CRC_DictList):
        Temp_Dict = {}
        for k1,v1 in y.items():
            if x.get(k1):
                Temp_Dict[k1] = int(v1)-int(x[k1])
                #if int(x[k1])-int(v1) < 10:
                #    print ("True")
                #print (Temp_Dict)
                Temp_List.append(Temp_Dict)
    print (Temp_List)
    return Temp_List