def returnBook(self, name):
try:
book = super().searchByName(name)
isbn = list(filter(lambda x: x[0] == book, self.booksissued))[0][1]
#checking for correlation between self.bookissued and
#Library.lended_book_data to extract rack value.
for i in self.booksissued:
if i[0] == book:
for j in Librarian.lended_book_data.get(book):
if j[0] == isbn:
rack = j[1]
#return book and update member variables.
Catalog._addBookItem(self, book, isbn, rack)
print(f"Book '{book}' returned.\n")
#updating variables :->
self.booksissued.remove((book, isbn))
self.issuedbookcount -= 1
self.bookitems.remove(isbn)
#updating Librarian.lended_book_data
for i in list(Librarian.lended_book_data.keys()):
#remove individual lended bookitem data from dictionary.
try:
lis = Librarian.lended_book_data.get(book)
for j in lis:
if isbn == j[0]:
Librarian.lended_book_data[book] = list(
filter(lambda x: x[0] != isbn, lis))
# remove book from dictionary if all the bookitems are returned.
if len(Librarian.lended_book_data.get(book)) == 0:
Librarian.lended_book_data.pop(i)
except TypeError:
return
except IndexError:
print(f"{self.name},'{book}' is not in your inventory.\n")
