Stata has the best data management of a single data set (a single data frame) that I have come across. Is anyone willing to give a brief description of the data management capabilities in Python (propably meaning pandas and numpy)? For instance, Stata has flexible and convenient variations of the -egen- command for grouped data. Another example is Stata's interpretation of if/else, it adapts to the object we use it on (a simple scalar vs a vector, with a vector if/else automatically becomes vectorised and applied to each observation separately).

Do we have similar data management capabilities within Python when we send a small program from Stata to Python?