python項目中的字典值

Question

所以我被困在我的項目的一部分。在這個項目中，我們必須讀庫文件到字典中創造的東西，如：

inventory = {author: "book title, quantity, price"} 

，我已經做了。然後我們必須做一個功能

1. 顯示圖書館，排序。
2. 向作者添加一本書。
3. 更改書的數量。
4. 計算圖書館的總金額。
5. 退出。

我被困在第3部分，這裏是我到目前爲止，但我不知道如何檢查書名是否在庫存中，因爲標題中的每個單詞都是大寫。

def changeQty(inventory): 
     author = inventory.keys() 
     book = inventory.values() 
     lastName = raw_input("Enter the author's last name: ").capitalize() 
     firstName = raw_input("Enter the author's first name: ").capitalize() 
     check = lastName + ", " + firstName 
     while check not in author: 
      print "There is no author by that name in the library."  
      lastName = raw_input("Enter the author's last name: ").capitalize() 
      firstName = raw_input("Enter the author's first name: ").capitalize() 
      check = lastName + ", " + firstName 

     #after here i am stuck trying to make the title of 1 OR MORE words all     
     #capitalized, to check to see if the title is in reference.getTitle() 
     #example: title of dickens, charles would be Hart Times 
     title = raw_input("Enter the title: ") 
     for info in book: 
      for reference in info: 
       while title not in reference.getTitle(): 
        print "This book does not exist in the library." 
        title = raw_input("Enter the title: ") 
    def main(): 
     inventory = {} 
     test = readDatabase(inventory) 
     done = False 
     while not done: 
      menuOpt = raw_input("Please choose a menu option: ") 
      if menuOpt == '3': 
       newQty = changeQty(inventory) 
      elif menuOpt == '5': 
       print "Thank you for choosing this program to view your inventory" 
       print "Now exiting" 
       done = True 
      else: 
       print str(menuOpt) + " is outside this program's options." 
       print "Please choose again." 
    main() 

    class Book: 
     #constructor 
     def __init__(self, title, qty, price): 
      self.title = str(title) 
      self.qty = int(qty) 
      self.price = float(price) 

     #Accessors: 
     def getTitle(self): 
      return self.title 

     def getQte(self): 
      return self.qty 

     def getPrice(self): 
      return self.price 

     def getTotal(self): 
      return self.price * self.qty 

     #Mutators: 
     def setQty(self, newQty): 
      self.qty = newQty 

     def setPrice(self, newPrice): 
      self.price = newPrice 

     #Display method 
     def displayInfo(self): 
      print "\tTitle: " + self.title 
      print "\tQty: " + str(self.qty) 
      print "\tPrice: %.2f", %self.price 

我省略了一些功能齊全，但爭論的緣故，假定在def changeQty(inventory)，本書是對象的列表：名稱，數量，價格。

Answer 1

我想這應該工作：

if title.lower() !=reference.getTitle().lower(): 

    def getTitle(self): 
     return self.title.lower() #or you can call this method when you want to do the comparison 

Answer 2

你可能會涉及額外的空白區域，在這種情況下.trim（）可以幫助，但總體來說字符串比較，我發現。載有（）更多有用比==。

上面一樣司法部的例子，但是：

if title.lower().contains(reference.getTitle().lower().trim()): 
    #do stuff