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.

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 …

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 …

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.

In Python 3.8.4 it can be checked that the method with isinstance will fail when checking if a datetime is whether a date or a datetime as both checks will give True.

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

Hence, isinstance acquires a "new" meaning - it just checks for "declared" type compatibility, which is a good way to go in Python. On the other hand, if your object does not satisfy the …

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 …