class Library:
    def __init__(self):
        self.list=[]
    def prosmotr (self):
        for book in self.list:
           print (book.a, '\'',book.n,'\',''\'', book.p,'\',', book.y,',', book.num)

    def include (self, author, name, publishing, YearPubl, NumPages):
            bookX = Book (author, name, publishing, YearPubl, NumPages)
            self.list.insert(0,bookX)

    def delete (self, number):
        del self.list [number-1]

    def SearchName(self, name):
        for book in self.list:
            if book.n == name:
                print(book.a, book.n, book.p, book.y, book.num)

    def SearchAuthor(self, name):
        for book in self.list:
            if book.a == name:
                print(book.a, book.n, book.p, book.y, book.num)

    def SearchPublishing(self, name):
        for book in self.list:
            if book.p == name:
                print(book.a, book.n, book.p, book.y, book.num)

    def SearchYearPubl(self, name):
        for book in self.list:
            if book.y == name:
                print(book.a, book.n, book.p, book.y, book.num)

    def LoadFromFile(self, FileName):
        f = open (FileName + '.txt')
        for line in f:
            k = 0
            author = ''
            name = ''
            publishing = ''
            YearPubl = ''
            NumPages = ''
            letter = line[k]
            while letter != '|' :
                author = author + letter
                k = k + 1
                letter = line[k]
            k = k + 1
            letter = line[k]
            while letter != '|' :
                name = name + letter
                k = k + 1
                letter = line[k]
            k = k + 1
            letter = line[k]
            while letter != '|' :
                publishing = publishing + letter
                k = k + 1
                letter = line[k]
            k = k + 1
            letter = line[k]
            while letter != '|' :
                YearPubl = YearPubl + letter
                k = k + 1
                letter = line[k]
            k = k + 1
            letter = line[k]
            while letter != '\n' :
                NumPages = NumPages + letter
                k = k + 1
                letter = line[k]
            self.include (author, name, publishing, int(YearPubl), int(NumPages))
        f.close()


    def LoadInFile (self, FileName):
        f = open (FileName + '.txt', 'w')
        for book in self.list:
            f.write(book.a + '|'  + book.n + '|' + book.p + '|' + str(book.y) + '|' + str(book.num) + '\n')
        f.close()


class Book:
    def __init__(self, author, name, publishing, YearPubl, NumbPages):
        self.a = author
        self.n = name
        self.p = publishing
        self.y = YearPubl
        self.num = NumbPages