import re

class SystemDecyzyjny:

    def printFile(self):
        f = open(self)
        print(f.read())

    def splitIntoLines(self):
        return re.split(r'\n', self)

    def getNAttribute(self):
        whichAttribute = 0
        intArray=list.insert()
        for i in self:
            if 'n' in i:
                print(i)

def main():
    SystemDecyzyjny.printFile("australian-type.txt")
    array = SystemDecyzyjny.splitIntoLines(open("australian-type.txt").read())
    print(array)

    SystemDecyzyjny.getNAttribute(array)

if __name__ == "__main__":
    main()