[issue7447] Sum() doc and behavior mismatch

[Terry J. Reedy]

Terry J. Reedy <tjreedy at udel.edu> added the comment:

Leonard, that you for the patch, in particular, the list of hints. I think the first is good but overly specific. It also has an extra '.itertools' in the path. Now:

'''
+      - To concatenate a list of lists ``lol`` use ``list(itertools.chain.from_iterable(lol))``
+        (see :func:`from_iterable <itertools.itertools.chain.from_iterable>`).
'''

How about instead"
'''
+      - To concatenate an iterable of iterables, such as a list of lists,
+        see :func:`from_iterable <itertools.chain.from_iterable>`
+        and call the appropriate constructor on the result, such as :class: `list`.
'''
?

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<http://bugs.python.org/issue7447>
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