Guido van Rossum <guido@python.org>: > > > Um, you meant "is >= 0". The find() method doesn't return a bool, it > > > returns the first index where the string is found, and -1 if it is not > > > found. > > > > Which only goes to prove that the people who've been whining about that > > characteristic of find() were right all along. ;-) > > So what would you like it to return? True/False, with no possibility > of finding where the substring starts? That defeats a common use > case. True. On the other hand, this is a very common gotcha. I've been bitten by it three times in the last week, and I should know better. Fact is that missing > -1 is hard to spot. I think the right answer is to leave find() as it is and have a different notation that returns bool. How about `a in b' whenever a and b are both string-valued? Seems the most natural candidate. -- <a href="http://www.tuxedo.org/~esr/">Eric S. Raymond</a>
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