[issue3243] Support iterable bodies in httplib

[Raymond Hettinger]

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

Instead of 
    hasattr(str,'next')

consider using
    isinstance(str, collections.Iterable)

Also consider changing the variable name from the now overly type specific, "str" to something like "source" to indicate the significance of the data, not its type.

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nosy: +rhettinger

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