I got this error: AttributeError: 'NoneType' object has no attribute 'something' What general scenarios might cause such an AttributeError, and how can I identify the problem? This is a special c...

Oct 8, 2010 · (a) Confuses NoneType and None (b) thinks that NameError: name 'NoneType' is not defined and TypeError: cannot concatenate 'str' and 'NoneType' objects are the same as TypeError: 'NoneType' object is not iterable (c) comparison between Python and java is "a bunch of unrelated nonsense" –

Jan 13, 2014 · In Python. NoneType is the type of the None object.; There is only one such object. Therefore, "a None object" and "the None object" and "None" are three equivalent ways of saying the same thing.

The idea that a function returns a None object even when execution is successful is not easy to grasp by Python beginners. – samirko Commented Jul 3, 2020 at 22:11

Mar 18, 2015 · There are a number of ways to do this. If you just want to see if an object exists, you can do: if self.myObject: # do stuff with my object else: # do other stuff #Or the more explicit form, if myObject could be 'falsey' normally, like an empty list/dict if self.myObject is not None:

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Regex issue python capturing group that can exist but does not always exist 0 AttributeError: 'NoneType' object has no attribute 'group' , group doesn't return none

Since None is the sole singleton object of NoneType in Python, we can use is operator to check if a variable has None in it or not. Quoting from is docs , The operators is and is not test for object identity: x is y is true if and only if x and y are the same object.

Sep 17, 2014 · When I run program I have the following error: result.append(cite.string.split('/')[0]) AttributeError: 'NoneType' object has no attribute 'split' Output Sample:

Dec 9, 2016 · NoneType means that instead of an instance of whatever Class or Object you think you're working with, you've actually got None. That usually means that an assignment or function call up above failed or returned an unexpected result.