def enshelf(self):
if self.subject not in list_of_shelves:
Shelf(self.subject)
contentOfShelves[list_of_shelves.index(self.subject)][0][self.subject].update({self.name: self.quantity()})
else:
contentOfShelves[list_of_shelves.index(self.subject)][0][self.subject].update({self.name: self.quantity()})
def unshelf(self):
_shelfContent = contentOfShelves[list_of_shelves.index(self.subject)][0]
_title = self.name #book_quantity.keys()[list_of_shelves.index(self.subject)]#_title = books[self.id]
bookqty = int(_shelfContent[self.subject][_title])
bookqty += -1
if bookqty == 0:
del _shelfContent[self.subject][_title]
else:
_shelfContent[self.subject][_title] = bookqty
del books[self.id]
def getShelfNumber(subject):
return list_of_shelves.index(subject)
def createShelf(self):
if self.subject in list_of_shelves:
print
print "USER ERROR: Shelf already exists. " + self.subject.upper() + " is shelf - " + str(list_of_shelves.index(self.subject) + 1)
print "PLEASE RECREATE LIBRARY AGAIN! FOLLOW INSTRUCTIONS ACCORDINGLY. "
print
sys.exit()
else:
list_of_shelves.append(self.subject)
self._updatecontentOfShelves()
