Check if all elements of a list are of the same type

Question

How can I check if the elements of a list are of the same type, without checking individually every element if possible?

For example, I would like to have a function

Answer 1

Combining some of the answers already given, using a combination of map(), type() and set() provides a imho rather readable answer. Assuming the limitation of not checking for type polymorphisms is ok. Also not the most computationally efficient answer, but it allows to easily check whether all elements are of the same type.

# To check whether all elements in a list are integers
set(map(type, [1,2,3])) == {int}
# To check whether all elements are of the same type
len(set(map(type, [1,2,3]))) == 1