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Author: coding-pythonx

lib.py

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+class Library:
+    def __init__(self, bookslist, name):  # Here, name is the library name
+        self.booksList = bookslist
+        self.name = name
+        self.lendDict = {}
+
+    def displayBooks(self):
+        print(f"We have following books in our library: {self.name}")
+        for book in self.booksList:
+            print(book)
+
+    def lendBook(self, book, user):
+        if book in booksList:
+            if book not in self.lendDict.keys():
+                self.lendDict.update({book: user})
+                print("Book has been lended. Database updated.")
+            else:
+                print(f"Book is already being used by {self.lendDict[book]}")
+        else:
+            print("Apologies! We don't have this book in our library")
+
+    def addBook(self, book):
+        if book in booksList:
+            print("Book already exists")
+        else:
+            self.booksList.append(book)
+            bookDatabase = open(databaseName, "a")
+            bookDatabase.write("\n")
+            bookDatabase.write(book)
+            print("Book added")
+
+    def returnBook(self, book):
+        if book in self.lendDict.keys():
+            self.lendDict.pop(book)
+            print("Book Returned Successfully")
+        else:
+            print("The book does not exist in the Book Lending Database")
+
+
+def main():
+    while(True):
+        print(
+            f"Welcome to the {library.name} library. Following are the options,")
+        choice = """ 
+        1. Display Books
+        2. Lend a Book
+        3. Add a Book
+        4. Return a Book
+        """
+        print(choice)
+
+        userInput = input("Press Q to quit and C to continue:")
+        if userInput == "C":
+            userChoice = int(input("Select an option to continue:"))
+            if userChoice == 1:
+                library.displayBooks()
+
+            elif userChoice == 2:
+                book = input("Enter the name of the book you want to lend:")
+                user = input("Enter the name of the user:")
+                library.lendBook(book, user)
+
+            elif userChoice == 3:
+                book = input("Enter the name of the book you want to add:")
+                library.addBook(book)
+
+            elif userChoice == 4:
+                book = input("Enter the name of the book you want to return:")
+                library.returnBook(book)
+
+            else:
+                print("Please choose a valid option")
+
+        elif userInput == "Q":
+            break
+
+        else:
+            print("Please enter a valid option")
+
+
+if __name__ == '__main__':
+    booksList = []
+    databaseName = input("Enter the name of the database file with extension:")
+    bookDatabase = open(databaseName, "r")
+    for book in bookDatabase:
+        booksList.append(book)
+    library = Library(booksList, "PythonX")
+    main()

pyDb.txt

@@ -0,0 +1,2 @@
+Python Crash Course
+Head First Python