Reports: PY3K compatibility fix for PEP 3114

Quoted from PEP 3114:

    The iterator protocol in Python 2.x consists of two methods:
    __iter__() called on an iterable object to yield an iterator,
    and next() called on an iterator object to yield the next item in
    the sequence. Using a for loop to iterate over an iterable object
    implicitly calls both of these methods. This PEP proposes that the
    next method be renamed to __next__, consistent with all the other
    protocols in Python in which a method is implicitly called as part
    of a language-level protocol, and that a built-in function named
    next be introduced to invoke __next__ method, consistent with the
    manner in which other protocols are explicitly invoked.

Signed-off-by: Sol Jerome <sol.jerome@gmail.com>

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