[Python-Dev] NoneType(None) raises exception (original) (raw)

Antoine Pitrou solipsis at pitrou.net
Fri Apr 26 09:01:07 CEST 2013

On Thu, 25 Apr 2013 16:09:41 -0700 Ethan Furman <ethan at stoneleaf.us> wrote:

We just fixed NoneType() to return None instead of raising an exception.

Another use-case for calling NoneType is working with ORMs: result = [] for field in row: type = gettype(field) # returns int, bool, str, NoneType, ... result.append(type(field))

I don't understand what the use case is. If you already have a value of None, why do you call NoneType on it again?

Perhaps you should write:

if not isinstance(type, field): field = type(field)

Rehatds

Antoine.

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