[issue6379] Add first() function that would take first matching case from an iterator

[Martin v . Löwis]

Martin v. Löwis <mar...@v.loewis.de> added the comment:

Python already supports that, in the itertools module:

itertools.ifilter(lambda x:self._value.has_key(x),
                  ['es-AR','es','en-US']).next()

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nosy: +loewis

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<http://bugs.python.org/issue6379>
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