Wishlist item: itertools.flatten

[Leif K-Brooks]

Michael Spencer wrote:
>             if hasattr(item,"__iter__"): # Avoids iterating over strings

That's probably the cleanest way to avoid strings, but it's 
unfortunately not a good idea IMHO. Many objects (IndexedCatalog's 
Result objects are what I'm concerned about, but there are undoubtedly 
others) still rely entirely on the old-style sequence iteration protocol 
even though they're proper containers, so checking for __iter__ wouldn't 
work on them.  Explicitly doing isinstance(item, basestring) is probably 
the best option until older objects move to the new iteration protocol.