Normally, in Python, you want your code to support inheritance, of course (since inheritance is so handy, it would be bad to stop code using yours from using it!), so isinstance is less bad than …

Jun 26, 2012 · Now, the problem is that the numbers module was added in Python 2.6 and I need to write code that works with Python 2.5+ So if isinstance(var, Numbers.number) is not a solution.

Jan 28, 2013 · @exbluesbreaker What about isinstance(obj, object) or some other suitable class high up in our hierarchy? As others have ponted our, everything in Python is an instance of …

In python3, where every class is a type, isinstance() offers a lot of power. Without isinstance, if you're trying to parse a parameter that accepts a list or a dict, isinstance would appear to be …

I have a method that sometimes returns a NoneType value. So how can I question a variable that is a NoneType? I need to use if method, for example if not new: new = '#' I know that is the …

isinstance(object, classinfo) Return true if the object argument is an instance of the classinfo argument, or of a (direct, indirect or virtual) subclass thereof. Also return true if classinfo is a …

isinstance handles inheritance (see What are the differences between type () and isinstance ()?). For example, it will tell you if a variable is a string (either str or unicode), because they derive …

Checking isinstance(obj, Iterable) detects classes that are registered as Iterable or that have an __iter__() method, but it does not detect classes that iterate with the __getitem__() method. …

How would I use a negative form of Python's isinstance()? Normally negation would work something like x != 1 if x not in y if not a I just haven't seen an example with isinstance(), so I'd …

Aug 17, 2010 · class Spam(int): pass x = Spam(0) type(x) == int # False isinstance(x, int) # True This adheres to Python's strong polymorphism: you should allow any object that behaves like …