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What’s New in Python 2.7... Hurts My Brain.

PEP 3137: The memoryview Object

The memoryview object provides a view of another object’s memory content that matches the bytes type’s interface.

…snip example code…

The content of the view can be converted to a string of bytes or a list of integers:

…snip example code…

memoryview objects allow modifying the underlying object if it’s a mutable object.

See also

PEP 3137 - Immutable Bytes and Mutable Buffer
PEP written by Guido van Rossum. Implemented by Travis Oliphant, Antoine Pitrou and others. Backported to 2.7 by Antoine Pitrou; issue 2396.

This. This makes my brain hurt.