Question

I am trying to do something like the following in python, but i am getting an invalid syntax error:

network_n = 192.168.38
octate_n = network_n.split(".")
if (len(o) [for o in octate_n]) == 3:

But when i am run it, i get:

if (len(o) [for o in octate_n]) == 3:
                  ^
SyntaxError: invalid syntax

My problem is with the if statement, what is wrong there ?

I admit that i have a rough idea about the difference between the () and the [] in the if statement, so i would be glad that you give me a short explanation about it.

Answer 1

Use all:

if(all(len(o) == 3 for o in octate_n)):
    # do stuff

About your seconds question, [o for o in octate_n] creates a list that consists of all items in octate_n (this is called a list comprehension), while (o for o in octate_n) creates a generator that will yield all the items of octate_n (this is called a generator expression).