In our deployment of Python 2.7, we've patched `unicodedata` to introduce a new function: `is_normalized` can check whether a unistr is in a given normal form. This currently has to be done by creating a normalized copy, then checking whether it is equal to the source string.

This function uses the internal helper (also called `is_normalized`) that can "quick check" normalization, but falls back on creating a normalized copy and comparing (when necessary).

We're contributing this change in case this can helpful to others. Feedback is welcome!