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 checking …

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 some class, …

Nov 9, 2022 · isinstance(var, (classinfo1, classinfo2, classinfo3)) In other words, isinstance() already offers this functionality, out of the box. From the isinstance() documentation: If classinfo is neither a …

Additional information You can also check for multiple types in one isinstance() statement as mentioned in the documentation. Just write the types as a tuple.

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 type object (new …

isinstance(x, (types.FunctionType, types.BuiltinFunctionType, types.MethodType, types.BuiltinMethodType, types.UnboundMethodType)) I compared this with the code of is*() checks …

Jan 30, 2011 · The isinstance() built-in function is recommended for testing the type of an object, because it takes subclasses into account. So, if you're checking the type of a class object instead of …

For historic reasons, bool is a subclass of int, so True is an instance of int. (Originally, Python had no bool type, and things that returned truth values returned 1 or 0. When they added bool, True and …

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 from …