I was wondering if anybody knows how to enable or implement tab completion for dictionary keys in IPython? It seems like it wouldn\'t be very different from functionality that
IPython supports dict key completion for string keys since version 3.0.0 (despite not appearing in release notes), thanks to this patch. It also supports column name completion for numpy struct arrays and pandas DataFrame
columns, and for other types that redefine __getitem__
through defining _ipython_key_completions_.