Join two lists using list comprehension

Question

list1 = ['a', 'b', 'c', 'd']      
list2 = [1, 2, 3, 4]

# How can I get this result using list Comprehension
list3 = ['a', 'b', 'c', 'd', 1, 2, 3, 4]


list3 = [list1.append(x) for x in list2]
print(list3)

# returned
[None, None, None, None]

Answer 1

[*list1,*list2]

#['a', 'b', 'c', 'd', 1, 2, 3, 4]

not sure if this will be called list comp

Edit:

Technically this fits the definition of list comprehension

list1 = ['a', 'b', 'c', 'd']      
list2 = [1, 2, 3, 4]

list3 = [x for x in (*list1,*list2)]
#['a', 'b', 'c', 'd', 1, 2, 3, 4]

but, why would you do this when you can simply do:

list3=list1+list2