Is there a way to check if an instance of a specific data type is present in a list / dictionary, without explicitly checking every element / key? I suspect the answer is no. If it does exist, though, I imagine it would be similar to the way you can use the in operator to search for specific elements / keys, like this: 3 in [1, 2, 3] # => True except you'd be checking for an instance of a data type rather than a some specific value, like this: int in [1,"a", 3.4] # => True Any ideas? Continue reading...