Python-сообщество

# -*- coding: cp1251 -*-

listik = []
						
def main():
    global listik
    """Функция запуска"""
    f1 = open("1.txt", "r")
    for i1 in f1.readlines():
        listik.append(i1.rstrip("\n"))
    for i2 in listik:
        if i2 != [x.rstrip("\n") for x in open("2.txt", "r")]:
            with open("3.txt", "a") as f2:
                f2.write(i2 + "\n")
        else: pass
    f1.close()
			
main()
	
raw_input("Kon4ul ...")

with open('file', 'r') as fin, open('blacklist', 'r') as fblack_list, \
     open('output', 'w') as fout:
     black_list = set(fblack_list.read().splitlines())
      
     for line in fin:
        if line.strip() not in black_list:
            fout.write(line)

 if i2 != [x.rstrip("\n") for x in open("2.txt", "r")]

 [x.rstrip(... ]

"line1" != [ "line2", "line3" ... "line1" ]

# -*- coding: cp1251 -*-

listik = []

def deleter(x, y):
    """Функция удаления"""
    x = x.rstrip("\n")
    if x not in y:
        with open("3.txt", "a") as f2:
            f2.write(x + "\n")
						
def main():
    """Функция запуска"""
    global listik
    f1 = open("2.txt", "r")
    for i1 in f1:
        listik.append(i1.rstrip("\n"))
    for i2 in open("1.txt", "r"):
        deleter(i2, listik)
    f1.close()
			
main()
	
raw_input("Kon4ul ...")

black_list = set(fblack_list)