Trying to lead list from txt file in a library system

Question

class Library:
def __init__(self,listofbooks):
#what attributes does a library in general have? - for now, let's abstract and just say it has availablebooks (we're not going to program the shelves, and walls in!)
self.availablebooks=listofbooks

def displayAvailablebooks(self):
print("Here are the books in our library:")
print("_________________________________")
for book in self.availablebooks:
print(book)
def lendBook(self,requestedBook):
if requestedBook in self.availablebooks:
print("you have successfully borrowed the book")
self.availablebooks.remove(requestedBook)
else:
print("Sorry the book you have requested is currently not in the library")

def addBook(self,returnedBook):
self.availablebooks.append(returnedBook)
print("You have successfully returned the book. Thank You!")

class Student:
def requestBook(self):
print("Enter the name of the book you would like to lend ")
self.book=input()
return self.book

def returnBook(self):
print("Enter the name of the book you would like to return ")
self.book=input()
return self.book

def main():
f = open("books.txt", "w")
for sublist in books:
sublist = str(sublist)
f.write(str(sublist[1:-1]))
f.write("\n")
f.close()

library=Library()
student=Student()
done=False
while done==False:
print(""" ======WELCOME TO THE LIBRARY MENU=======
Please Select One of the Four Options :)
1. Display all available books
2. Request a book
3. Return a book
4. Exit
=========

Answer 1

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Answer 2

I have managed to get the code working when it is reading straight from a list with the following program

def main():

library=Library(["Tales of Two Cities","Black House","Hound of the Baskervilles"])
student=Student()
done=False
while done==False:
print(""" ======WELCOME TO THE LIBRARY MENU=======
Please Select One of the Four Options :)
1. Display all available books
2. Request a book
3. Return a book
4. Exit
============ THANK YOU============
""")
choice=int(input("Enter Choice:"))
if choice==1:
library.displayAvailablebooks()
elif choice==2:
library.lendBook(student.requestBook())
elif choice==3:
library.addBook(student.returnBook())
elif choice==4:
sys.exit()
main()

however, it will not read from a specific books.txt file