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 …

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 27, 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 …

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.

My guess would be that its Python's internal subclassing, as zero and one - whether float or int - both evaluate when used as boolean, but don't know the exact reason.

The problem you are describing occurs when the same module is imported twice under different names and Python cannot tell that those two names reference the same file. This is a bug in …

14 type must be an object denoting a type/class, such as int or str. E.g., isinstance(1, int) evaluates to True, while isinstance(sys.stdin, str) evaluates to False. If you've defined a class …

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 …

Mar 24, 2023 · isinstance("my string", "str | int") isinstance("my string", "list") Is there a way to check the type of a variable ("my string" in this case) based on a valid type which is stored as …

Oct 4, 2014 · For the following code, str is variable of unicode type but str is unicode # returns false isinstance(str, unicode) # returns true Why is is return false?