[issue7447] Sum() doc and behavior mismatch

[Raymond Hettinger]

Raymond Hettinger <rhettinger at users.sourceforge.net> added the comment:

I want to look at this more before it goes forward.
The docs are roughly correct as-is.  In a effort
to make them precise, it is easy make them more
confusing or at least a bit harder to understand
the basic function of sum().

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assignee: docs at python -> rhettinger
priority: normal -> low

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