Question

How do you verify that the type of all elements in a list or a tuple are the same and of a certain type?

for example:

(1, 2, 3)  # test for all int = True
(1, 3, 'a') # test for all int = False

Answer 1

all(isinstance(n, int) for n in lst)

Demo:

In [3]: lst = (1,2,3)

In [4]: all(isinstance(n, int) for n in lst)
Out[4]: True

In [5]: lst = (1,2,'3')

In [6]: all(isinstance(n, int) for n in lst)
Out[6]: False

Instead of isinstance(n, int) you could also use type(n) is int