Add dynamically into a set

Question

I have a list of lists into map object, if I do:

print(my_list)  # map object
print(list(my_list)) # [[1, 2], [1, 2, 3], [1]]

and I want to insert them into a set object to remove duplicate items.

I know I can do a for, or whatever, but I want to do in one line

I tried:

res = my_set.update(x) for x in my_list

but I got:

SyntaxError: invalid syntax

Any idea?

Answer 1

Is this what you want?

{item for sublist in list(my_list) for item in sublist}