There are two string methods for this, find() and index() . The difference between the two is what happens when the search string isn't ... ... <看更多>
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There are two string methods for this, find() and index() . The difference between the two is what happens when the search string isn't ... ... <看更多>
word[42] # the word only has 6 characters Traceback (most recent call last): File "<stdin>", line 1, in <module> IndexError: string index out of range. ... <看更多>
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我想要把所有'a'的index找出,我知道有正規畫表示法, 但在自己在試寫的時候出現了下面問題,請幫忙解惑,感謝大家! x = 'An apple a day, ... ... <看更多>