input record seperator (equivalent of "$|" of perl)

[Fredrik Lundh]

Scott David Daniels wrote:

> True. The 2.4 document says that itertools.groupby() is equivalent to:
>
>     class groupby(object):

> So you could always just use that code.

the right way to do that is to use the Python version as a fallback:

    try:
        from itertools import groupby
    except ImportError:
        class groupby(object):
            ...

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