Python : Exception Handling

以parsing文字檔的內容來做例外處理的範例, parsing過程中其它列的內容可能和原本預設格式不同, 此時就會有例外產生:

with open('a.txt', 'r') as f:
    badLine = 0
    goodLine = 0
    totalLine = 0

    for line in f:
        try:
            d1, d2, d3 = line.split()
        except:
            badLine += 1    
        else:
            goodLine += 1
        finally:  
            totalLine += 1   

    print('totalLine : {}, badLine: {}, goodLine: {}'.format(str(totalLine), str(badLine), str(goodLine)))


以下是 a.txt的內容:

1 2 3
yy
5 6 7
xx
6 7 8

輸出:
totalLine : 5, badLine: 2, goodLine: 3

<Note>
raise Exception("自己raise exception")