How to reset a pandas dataframe data types to default or auto detect?

Question

Is it possible to reset a dataframe dtypes to default or auto detected ones (e.g., to detect and match strings and numbers) after they have been set manually? If so how?

Answer 1

A possibility is to use convert_objects:

Attempt to infer better dtype for object columns

This will work well e.g. if you've made it of object dtype, but this certainly isn't a magic bullet.