Check if a list has specific number of whole numbers

Question

So I tried to do something like list.is_integer() but I don't think it's working.

Is there any method to determine if a list has for example 2 whole numbers in it?

Answer 1

If you know the number, simply use the in operator:

1 in [1, 2, 3]
# True

if you want to check the whole list consisting of integers, you'll need to use something different, for example:

all(isinstance(item, int) for item in [1, 2, 3])
# True

all() helps evaluating all of the values of an iterable and the condition for all items of a list being of int type can be checked by isinstance() function.

For specific count of the occurrences, simply switch all() to sum() which will add all of the truthy values that fulfill the condition:

sum(isinstance(item, int) for item in [1, 2, "3"])
# 2