example 1)
arr = [1,2,3,3,4,5,6,7,7]
remove_set = {3,5,7}
result = [i for i in arr if i not in result_set]
print(result) => [1,2,4,6]
a = 1
def function():
global a
a +=1
(1) def add(a,b) :
return a+b
(2) (lambda a, b : a+b)(3,7)
=> (1),(2)는 결과가 같다
import sys
sys.stdin.readline().rstrip()