_The csv version returns an iterator over a closed file_ That's why method/function naming is critical and underestimated. Without having worked with python to

_The csv version returns an iterator over a closed file_ That's why method/function naming is critical and underestimated. Without having worked with python too much: _json.load()_ is a load: implies the action is done on return. I understand there's nothing to do after it, other than use the return value. _csv.reader()_ clearly returns an object that it's going to be used to traverse the underlying, so the underlying must remain open. Implies a stateful operation to me. Besides, examples are clear: https://docs.python.org/3.8/library/csv.html#examples https://docs.python.org/3.8/library/csv.html#examples Classical problem of wanting to use The Perfect Abstraction.