flatten list of list through list comprehension

I am trying to flatten a list using list comprehension in python. My list is somewhat like

[[1, 2, 3], [4, 5, 6], 7, 8]

just for printing then individual item in this list of list I wrote this function:

def flat(listoflist):
    for item in listoflist:
        if type(item) != list:
            print(item)
        else:
            for num in item:
                print(num)

interactive output:

>>> flat(list1)
1
2
3
4
5
6
7
8

Then I used the same logic to flatten my list through list comprehension I am getting the following error

list2 = [item if type(item) != list else num for num in item for item in list1]

Which gives me the following error:

Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: 'int' object is not iterable

How can I flatten this type of list-of-list using using list comprehension ?