查找列表 1 中同时在列表 2 中找到的项目

debugcn 发表于 Dev

斯坦·K

我试图从 list1 中找到也匹配 list2 的元素。

到目前为止我所做的：

    with open('C:\python\list1.txt') as f:
    firstList = f.read().splitlines()

with open('C:\python\list2.txt') as g:
    secondList = g.read().splitlines()

resListFound = []
resListNotFound = []

for x in firstList:
    if x in secondList:
        resListFound.append(x)
        print (x + " found in list 2!")
    else:
        print (x + " NOT found in list 2")

    resListNotFound.append(x)


resultFile1 = open('found.txt', 'w')
resultFile2 = open('notFound.txt', 'w')

for item in resListFound:
    resultFile.write("%s\n" % item)
for item in resListNotFound:
    resultFile.write("%s\n" % item)

问题是我正在OSErrror(22, 'Invalid Argument)第 4 行，但我没有看到任何可能触发它的东西，因为它正在加载list2文件，就像list1

诺斯洛

如果您不想维护订单，您可以使用 set 进行更快的比较：

with open('C:\python\list1.txt') as f:
    firstSet = set(f)

with open('C:\python\list2.txt') as g:
    secondSet = set(g)

resListFound = firstSet & secondSet
resListNotFound = firstSet - secondSet

如果您确实需要订购，那么您可以将第二个列表转换为一组以便更快地查找：

secondSet = set(secondList)

for x in firstList:
    if x in secondSet:
        resListFound.append(x)
        print (x + " found in list 2!")
    else:
        resListNotFound.append(x)
        print (x + " NOT found in list 2")

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