Negative form of isinstance() in Python
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 like to know if there's a correct way to used negation with isinstance().
Just use not. isinstance just returns a bool, which you can not like any other.
That would seem strange, but:
if not isinstance(...): ...
The isinstance function returns a boolean value. That means that you can negate it (or make any other logical operations like or or and).
>>> a="str" >>> isinstance(a, str) True >>> not isinstance(a, str) False
Just use not, e.g.,
if not isinstance(someVariable, str): ....
You are simply negating the "truth value" (ie Boolean) that isinstance is returning.