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Chapter 12 code error #16

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brisksea opened this issue Apr 13, 2020 · 0 comments

brisksea commented Apr 13, 2020

def createInitSet(dataSet):
    retDict = {}
    for trans in dataSet:
        retDict[frozenset(trans)] = 1
    return retDict

the code retDict[frozenset(trans)] = 1, not consider when two transactions are the same.
should changed to

def createInitSet(dataSet):
    retDict = {}
    for trans in dataSet:
        retDict[frozenset(trans)] = retDict.get(frozenset(trans), 0) + 1
    return retDict

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