def main():
"""
Displays a menu and lets user add, remove, display, checkout, return and find items in a library catalog.
"""
catalogue = Catalogue()
# book1 = Book("title1", 22323, "author", 4)
# dvd1 = Dvd("dvdt", 1111, "jurassic", 2, "sept 2", "japan")
# catalogue.add_item(book1)
# catalogue.add_item(dvd1)
while True:
print(""" ======LIBRARY MENU=======
1. Add Item
2. Remove item
3. Display all items
4. Checkout item
5. Return item
6. Find item
7. Exit
""")
choice = int(input("Enter Choice:"))
if choice == 1:
catalogue.add_item(catalogue)
elif choice == 2:
user_input = int(input("enter call number: "))
catalogue.remove_item(user_input)
elif choice == 3:
catalogue.display_available_items()
elif choice == 4:
user_input = int(input("enter call number: "))
catalogue.check_out(user_input)
elif choice == 5:
user_input = int(input("enter call number: "))
catalogue.return_item(user_input)
elif choice == 6:
user_input = input("enter title to search: ").capitalize()
catalogue.search(user_input)
if choice == 7:
sys.exit()
class Library:
"""
Represent a library that has a collection of items.
The library can create, search, check out and return items.
"""
def __init__(self):
"""
Creates a new library with an empty list of items
"""
self.myCatalogue = Catalogue()
def add_item(self):
"""
Adds a book to the library's collection if the collection
doesn't already contain the book
"""
self.myCatalogue.add_item()
def remove_item(self, call_number):
"""
Removes a book from the library's book collection
:param call_number: A book's call number
:return: Message telling user whether book was successfully
deleted
"""
return self.myCatalogue.check_out(call_number)
def check_out(self, call_number):
"""
Checks a book out from the library if it exists.
Everytime a book is checked out, the number of copies available
of the book is decremented by 1.
:param call_number: A book's call number
:return: Message telling user whether the check out was
successful
"""
return self.myCatalogue.check_out(call_number)
def return_item(self, call_number):
"""
Returns a book to the library's collection if the book exists
in the collection. Once a book is returned, its number of copies
available is incremented by 1
:param call_number: a book's call number
:return: Message telling user whether the return was successful
"""
return self.myCatalogue.return_item(call_number)
def find_item(self, title):
"""
Search the library's list of items for a title. If the list
contains the title, return the item
:param title: title of a item
:return: the item that matches title from parameter
"""
return self.myCatalogue.find_item(title)
def display_available_items(self):
"""
Prints out the list of available items and their details
"""
return self.myCatalogue.display_available_items()
class Library:
"""
The Library consists of a list of books and provides an
interface for users to check out, return and find books.
"""
def __init__(self, catalogue):
"""
Initialize the library with a list of books.
:param catalogue: a list of item objects to create catalogue from.
"""
self._catalogue = Catalogue(catalogue)
def display_library_menu(self):
"""
Display the library menu allowing the user to either access the
list of books, check out, return, find, add, remove a book.
"""
user_input = None
while user_input != 7:
print("\nWelcome to the Library!")
print("-----------------------")
print("1. Display all items")
print("2. Check Out an item")
print("3. Return an item")
print("4. Find an item")
print("5. Add an item")
print("6. Remove an item")
print("7. Quit")
string_input = input("Please enter your choice (1-7)\n")
# handle user pressing only enter in menu
if string_input == '':
continue
user_input = int(string_input)
if user_input == 1:
self._catalogue.display_available_item()
user_input = input("Press Enter to continue\n")
elif user_input == 2:
call_number = input("Enter the call number of the book"
" you wish to check out.\n")
self._catalogue.check_out(call_number)
elif user_input == 3:
call_number = input("Enter the call number of the book"
" you wish to return.\n")
self._catalogue.return_item(call_number)
elif user_input == 4:
input_title = input("Enter the title of the book.\n")
found_titles = self._catalogue.find_items(input_title)
print("We found the following:")
if len(found_titles) > 0:
print(*[title for title in found_titles], sep='\n')
else:
print("Sorry! We found nothing with that title")
elif user_input == 5:
self._catalogue.add_item()
elif user_input == 6:
call_number = input("Enter the call number of the book\n")
self._catalogue.remove_item(call_number)
elif user_input == 7:
pass
else:
print("Could not process the input. Please enter a"
" number from 1 - 7.")
print("Thank you for visiting the Library.")