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 class Library:     def__init__(self,listofbooks,libraryname):         self.lst = listofbooks         self.name = libraryname     def displaybook(self):         return f"\t\t\t\tWelcome to {self.name} \         \navaliable books are -\n {self.lst}"     def lendbook(self,lendname,bookname):         if bookname in lst and bookname not in d:             print(f"{bookname} lend to {lendname}")             d.__setitem__(bookname,lendname)         elif bookname in d:             lst.remove(bookname)             print("Book is not available lend to-",d[bookname],"\nwe only have-",lst)         else:             print("Book is not in the library we only have-",lst)     def addbook(self,bookname):         print("Book added successfully in the library")         lst.append(bookname)     def returnbook(self,returenername,bookname):         if returenername in d[bookname]:             print("Book successfully returned")