[Python-Dev] PEP 0424: A method for exposing a length hint (original) (raw)

Alex Gaynor alex.gaynor at gmail.com
Tue Jul 17 05:03:08 CEST 2012

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I've updated the PEP to reflect the discussion. There are two major changes:

1. NotImplemented may be used by length_hint to indicate that there is no finite length hint available.
2. callers of operator.length_hint() must provide their own default value, this is also required by the current C _PyObject_LengthHint implementation.

There are no provisions for infinite iterators, that is not within the scope of this proposal.

Alex

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