递归组合都不会了？尼玛

def getCombinationExtraSet(extraList, index, selectExtraSet, oneExtraSet):
    if (index >= len(extraList)):  #
        selectExtraSet.add(frozenset(oneExtraSet))
        return

    extra = extraList[index]
    if (extra.type == "int"):
        oneExtraSetCopy = set(oneExtraSet)
        oneExtraSetCopy.add(extra)  # ==
        getCombinationExtraSet(extraList, index + 1, selectExtraSet, oneExtraSetCopy)

        oneExtraSetCopy = set(oneExtraSet)
        extraG = Extra(extra.key, extra.type, extra.value)#+1
        extraG.value = int(extraG.value) + 1
        oneExtraSetCopy.add(extraG)
        getCombinationExtraSet(extraList, index + 1, selectExtraSet, oneExtraSetCopy)

        oneExtraSetCopy = set(oneExtraSet)
        extraL = Extra(extra.key, extra.type, extra.value)#-1
        extraL.value = int(extra.value) - 1
        oneExtraSetCopy.add(extraL)
        getCombinationExtraSet(extraList, index + 1, selectExtraSet, oneExtraSetCopy)
    else:
        if extra.type == "float":
            oneExtraSetCopy = set(oneExtraSet)
            oneExtraSetCopy.add(extra)
            getCombinationExtraSet(extraList, index + 1, selectExtraSet, oneExtraSetCopy)

            extraG = Extra(extra.key, extra.type, extra.value)
            extraG.value = float(extraG.value) + 0.1
            oneExtraSetCopy = set(oneExtraSet)
            oneExtraSetCopy.add(extraG)
            getCombinationExtraSet(extraList, index + 1, selectExtraSet, oneExtraSetCopy)

            extraL = Extra(extra.key, extra.type, extra.value)
            extraL.value = float(extra.value) - 0.1
            oneExtraSetCopy = set(oneExtraSet)
            oneExtraSetCopy.add(extraL)
            getCombinationExtraSet(extraList, index + 1, selectExtraSet, oneExtraSetCopy)
        else:
            if (extra.type != "java.lang.String"):
                fail_unHandle = open(logDir + "/" + "fail_unHandle.txt", 'a+')
                fail_unHandle.write(extra.type + "can't handle" + "\n")
                fail_unHandle.close()

            oneExtraSetCopy = set(oneExtraSet)
            getCombinationExtraSet(extraList, index + 1, selectExtraSet, oneExtraSetCopy)

            oneExtraSetCopy = set(oneExtraSet)
            oneExtraSetCopy.add(extra)
            getCombinationExtraSet(extraList, index + 1, selectExtraSet, oneExtraSetCopy)