Ng dZddlZejddkZejdddkZejdddkZejdddkZejddkZejdddkZerddl Z e fZ e efZeZeZd Zn$ddlZefZ esere efZne fZeZesereseZd ZneZd Zd ZGd d eZdS)zm A tiny version of `six` to help with backwards compability. Also includes compatibility helpers for numpy. N)r)r)rr)r?zr6sv&&  qQ !& !& 1* qQ !&6L)$LJ OJJJ:L tI v J U $6     ,     r