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The documentation at http://docs.python.org/py3k/library/itertools.html#itertools.chain and http://docs.python.org/library/itertools.html#itertools.chain is inconsistent.
At the definition of the class it states that itertools.chain.from_iterable can receive one iterable "Gets chained inputs from a single iterable argument that is evaluated lazily.", but then it contradicts itself by using the following example:
@classmethod
def from_iterable(iterables):
 # chain.from_iterable(['ABC', 'DEF']) --> A B C D E F
 for it in iterables:
 for element in it:
 yield element
This example could lead the reader to believe this alternative constructor can receive multiple iterable objects, when in fact it can receive only one.

My mistake reading the documentation.
Sorry, closing this issue.