[Python-ideas] data structures should have an .any() method

[Georg Brandl]

Antoine Pitrou schrieb:
> Steven D'Aprano <steve at ...> writes:
>> 
>> If you're expecting "exactly one result", then surely it should be an 
>> error to receive more than one result? Rather than ask for "any" result 
>> and ignoring any unexpected extra items, I think it would be better to 
>> have a helper function that verifies you have got exactly one result.
> 
> Why do you need a helper function?
> Simply write:
> 
>     x, = db.query("SELECT blah...")
> 
> and you'll get a ValueError if there isn't exactly one item in the sequence.

Amen!

Georg

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