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| -rw-r--r-- | Doc/lib/libstdtypes.tex | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/Doc/lib/libstdtypes.tex b/Doc/lib/libstdtypes.tex index 1a07d3c..aabc9bf 100644 --- a/Doc/lib/libstdtypes.tex +++ b/Doc/lib/libstdtypes.tex @@ -377,6 +377,13 @@ general and specific sequence types, dictionaries, and other more specialized forms. The specific types are not important beyond their implementation of the iterator protocol. +The intention of the protocol is that once an iterator's +\method{next()} method raises \exception{StopIteration}, it will +continue to do so on subsequent calls. Implementations that +do not obey this property are deemed broken. (This constraint +was added in Python 2.3; in Python 2.2, various iterators are +broken according to this rule.) + \subsection{Sequence Types \label{typesseq}} |