On the [Std Lib Incompatibilities Page](http://python-future.org/stdlib_incompatibilities.html#struct-pack) there is a note about how [struct.pack](https://docs.python.org/2/library/struct.html#struct.pack) cannot accept unicode format strings. This was actually [fixed in Python 2.7.7](https://hg.python.org/cpython/raw-file/f89216059edf/Misc/NEWS) and worth mentioning for developers who do not need to support older versions of Python 2.7.
On the Std Lib Incompatibilities Page there is a note about how struct.pack cannot accept unicode format strings.
This was actually fixed in Python 2.7.7 and worth mentioning for developers who do not need to support older versions of Python 2.7.