インベントリプログラムでtxtファイルを更新する問題を修正しました

Question

私は、ユーザーが商品のメニューから購入または返品するアイテムを選択できるようにする請求書プログラムを作成しています。ユーザがアイテムIDと必要な数量を入力すると、プログラムはinventory.txtファイルを読み込み、inventory.txtファイルに代わるUpdatedInventory.txtファイルを作成します。 はinventory.txtファイルは、次のようにフォーマットされます。

ID 
item 
stock 
price 

私のプログラムが実行されると、それはUpdatedInventory.txtファイルに正しく印刷されません。ここにはたくさんのコードがありますので、私と一緒に裸です。

ユーザーが作成したすべての購入がハードコードされていなくてもリストに追加された場合、コードを単純化するような気がします。助けてくれてありがとう！

ここに私のメインのコードです：

import InventoryFile 
import os 

def readFile(): 
    #open the file and read the lines 
    inventoryFile = open ('Inventory.txt', 'r') 
    raw_data = inventoryFile.readlines() 

    #remove the new line characters 
    clean_data = [] 
    for item in raw_data: 
     clean_item = item.rstrip ('\n') 
     clean_data.append (clean_item) 

    #read lists into objects 
    all_objects = [] 
    for i in range (0, len(clean_data), 4): 
     ID = clean_data [i] 
     item = clean_data [i+1] 
     qty = float (clean_data [i+2]) 
     price = float (clean_data [i+3]) 

     #create inventory object 
     inventory_object = InventoryFile.Inventory (ID, item, qty, price) 
     all_objects.append (inventory_object) 

    return all_objects 

def printMenu (all_data): 
    print() 
    print ('Select an item ID to purchase or return: ') 
    print() 
    print ('ID\tItem\t\t Quantity\t Price') 

    for item in all_data: 
     print (item) 

    print() 

    print ('Enter another item ID or 0 to stop') 

def modify(): 
    found = False 

    search = -1 
    while search == -1: 
     search = input ('Enter the ID of the product you would like to purchase: ') 

     try: 
      if search == '0': 
       print ('The inventory has been updated...') 
       break 

     except Exception: 
      search = -1 
      print ('ERROR: Please enter a valid number.') 

     else: 
      inventoryFile = open ('inventory.txt', 'r') 

      temp_file = open ('UpdatedInventory.txt', 'w') 

      ID = str (inventoryFile.readline()) 

      while ID != '': 
       item = str (inventoryFile.readline()) 
       qty = float (inventoryFile.readline()) 
       price = float (inventoryFile.readline()) 

       inventory_object = InventoryFile.Inventory (ID, item, qty, price) 

       ID = ID.rstrip ('\n') 

       if ID == search: 
        purchase = -1 
        while purchase == -1: 
         purchaseEntry = float (input ('How many would you like to purchase? Negative numbers are returns')) 
         purchase = inventory_object.purchase (purchaseEntry) 
         if purchase is False: 
          purchase = -1 
          print ('ERROR: Insufficient stock!') 

        new_qty = inventory_object.restock (purchase) 

        transaction_object = InventoryFile.TransactionItem (ID, item, new_qty, price) 

        transaction_object.set_id (ID) 
        transaction_object.set_name (item) 
        transaction_object.set_qty (new_qty) 
        transaction_object.set_price (price) 

        ID = transaction_object.get_id() 
        item = transaction_object.get_name() 
        qty = transaction_object.get_qty() 
        price = transaction_object.get_price() 

        temp_file.write (ID + '\n') 
        temp_file.write (item + '\n') 
        temp_file.write (str (qty) + '\n') 
        temp_file.write (str (price) + '\n') 

        found = True 

       else: 
        temp_file.write (ID + '\n') 
        temp_file.write (item + '\n') 
        temp_file.write (str (new_qty) + '\n') 
        temp_file.write (str (price) + '\n') 

       ID = inventoryFile.readline() 

      if found: 
       print ('The file has been updated.') 
      else: 
       print ('That item was not found in the file.') 

       inventoryFile.close() 
       temp_file.close() 

       os.remove ('inventory.txt') 

       os.rename ('UpdatedInventory.txt', 'inventory.txt') 

       print ('Inventory has been updated.') 
       break 

    return search 

def main(): 
    all_items = readFile() 
    printMenu (all_items) 
    modify() 


main() 

ここに私のインベントリクラスファイルがあります：ここでは

class Inventory(): 
    def __init__ (self, new_id, new_name, new_stock, new_price): 
     self.__id = new_id 
     self.__name = new_name 
     self.__stock = new_stock 
     self.__price = new_price 

    def get_id (self): 
     return self.__id 
    def get_name (self): 
     return self.__name 
    def get_stock (self): 
     return self.__stock 
    def get_price (self): 
     return self.__price 

    def restock (self, new_stock): 
     if new_stock < 0: 
      print ('ERROR') 
      return False 
     else: 
      self.__stock += new_stock 
      return True 

    def purchase (self, purch_qty): 
     if self.__stock >= purch_qty: 
      self.__stock -= purch_qty 
      return self.__stock 
     else: 
      print ('ERROR: Insufficient stock') 
      return False 

    def __str__ (self): 
     return self.__id + '\t' + self.__name + '\t' + \ 
     format (self.__stock, '7.2f') + format (self.__price, '7.2f') 

class TransactionItem (Inventory): 
    def __init__ (self, new_id, new_name, new_qty, new_price): 
     self.__qty = new_qty 
     Inventory.__init__(self, new_id, new_name, new_qty, new_price) 

    def get_id (self): 
     return self.__id 
    def set_id (self, new_id): 
     self.__id = new_id 
    def get_name (self): 
     return self.__name 
    def set_name (self, new_name): 
     self.__name = new_name 
    def get_qty (self): 
     return self.__qty 
    def set_qty (self, new_qty): 
     self.__qty = new_qty 
    def get_price (self): 
     return self.__price 
    def set_price (self, new_price): 
     self.__price = new_price 

    def calc_cost (self): 
     total = purch_qty * self.__price 

    def __str__ (self): 
     return self.__id + '\t' + self.__name + '\t' + \ 
     format (self.__qty, '7.2f') + format (self.__price, '7.2f') + \ 
     format (total, '7.2f') 

は私inventory.txtファイルです：

244 
Large Cake Pan 
7 
19.99 
576 
Assorted Sprinkles 
3 
12.89 
212 
Deluxe Icing Set 
6 
37.97 
827 
Yellow Cake Mix 
3 
1.99 
194 
Cupcake Display Board 
2 
27.99 
285 
Bakery Boxes 
7 
8.59 
736 
Mixer 
5 
136.94 

そしてここでは、更新するものですが、インベントリtxtは、製品ID 244を入力した後、購入数量5のようになります。

244 
Large Cake Pan 

4.0 
19.99 
576 
Assorted Sprinkles 

4.0 
12.89 
212 
Deluxe Icing Set 

4.0 
37.97 
827 
Yellow Cake Mix 

4.0 
1.99 
194 
Cupcake Display Board 

4.0 
27.99 
285 
Bakery Boxes 

4.0 
8.59 
736 
Mixer 

4.0 
136.94 

Answer 1

Iが無効になっTransactionItemをしました。これは機能しているようです（スクリプトファイルを組み合わせました）：

import os 


class Inventory(): 

    def __init__(self, new_id, new_name, new_stock, new_price): 
     self.__id = new_id 
     self.__name = new_name 
     self.__stock = new_stock 
     self.__price = new_price 

    def get_id(self): 
     return self.__id 

    def get_name(self): 
     return self.__name 

    def get_stock(self): 
     return self.__stock 

    def get_price(self): 
     return self.__price 

    def restock(self, new_stock): 
     if new_stock < 0: 
      print('ERROR') 
      return False 
     else: 
      self.__stock += new_stock 
      return True 

    def purchase(self, purch_qty): 
     if self.__stock >= purch_qty: 
      self.__stock -= purch_qty 
      return self.__stock 
     else: 
      print('ERROR: Insufficient stock') 
      return False 

    def __str__(self): 
     return self.__id + '\t' + self.__name + '\t' + \ 
      format(self.__stock, '7.2f') + format(self.__price, '7.2f') 


class TransactionItem (Inventory): 

    def __init__(self, new_id, new_name, new_qty, new_price): 
     self.__qty = new_qty 
     Inventory.__init__(self, new_id, new_name, new_qty, new_price) 

    def get_id(self): 
     return self.__id 

    def set_id(self, new_id): 
     self.__id = new_id 

    def get_name(self): 
     return self.__name 

    def set_name(self, new_name): 
     self.__name = new_name 

    def get_qty(self): 
     return self.__qty 

    def set_qty(self, new_qty): 
     self.__qty = new_qty 

    def get_price(self): 
     return self.__price 

    def set_price(self, new_price): 
     self.__price = new_price 

    def calc_cost(self): 
     self.total = purch_qty * self.__price 

    def __str__(self): 
     return self.__id + '\t' + self.__name + '\t' + \ 
      format (self.__qty, '7.2f') + format (self.__price, '7.2f') + \ 
      format(self.total, '7.2f') 


def readFile(): 
    # open the file and read the lines 
    inventoryFile = open('Inventory.txt', 'r') 
    raw_data = inventoryFile.readlines() 

    # remove the new line characters 
    clean_data = [] 
    for item in raw_data: 
     clean_item = item.rstrip('\n') 
     clean_data.append(clean_item) 

    # read lists into objects 
    all_objects = [] 
    for i in range(0, len(clean_data), 4): 
     ID = clean_data[i] 
     item = clean_data[i + 1] 
     qty = float(clean_data[i + 2]) 
     price = float(clean_data[i + 3]) 

     # create inventory object 
     inventory_object = Inventory(ID, item, qty, price) 
     all_objects.append(inventory_object) 

    return all_objects 


def printMenu(all_data): 
    print() 
    print('Select an item ID to purchase or return: ') 
    print() 
    print('ID\tItem\t\t Quantity\t Price') 

    for item in all_data: 
     print(item) 

    print() 

    print('Enter another item ID or 0 to stop') 


def modify(): 
    found = False 

    search = -1 
    while search == -1: 
     search = input(
      'Enter the ID of the product you would like to purchase: ') 

     try: 
      if search == '0': 
       print('The inventory has been updated...') 
       break 

     except Exception: 
      search = -1 
      print('ERROR: Please enter a valid number.') 

     else: 
      inventoryFile = open('inventory.txt', 'r') 

      temp_file = open('UpdatedInventory.txt', 'w') 

      ID = str(inventoryFile.readline()) 

      while ID != '': 
       item = str(inventoryFile.readline()) 
       qty = float(inventoryFile.readline()) 
       price = float(inventoryFile.readline()) 

       inventory_object = Inventory(ID, item, qty, price) 

       ID = ID.rstrip('\n') 
       item = item.rstrip('\n') 

       if ID == search: 
        purchase = -1 
        while purchase == -1: 
         purchaseEntry = float(
          input('How many would you like to purchase? Negative numbers are returns')) 
         purchase = inventory_object.purchase(purchaseEntry) 
         if purchase is False: 
          purchase = -1 
          print('ERROR: Insufficient stock!') 

        #new_qty = inventory_object.restock(purchase) 

        #transaction_object = TransactionItem(
        # ID, item, new_qty, price) 

        #transaction_object.set_id(ID) 
        #transaction_object.set_name(item) 
        #transaction_object.set_qty(new_qty) 
        #transaction_object.set_price(price) 

        #ID = transaction_object.get_id() 
        #item = transaction_object.get_name() 
        #qty = transaction_object.get_qty() 
        #price = transaction_object.get_price() 

        qty = inventory_object.get_stock() 
        price = inventory_object.get_price() 

        temp_file.write(ID + '\n') 
        temp_file.write(item + '\n') 
        temp_file.write(str(int(qty)) + '\n') 
        temp_file.write(str(price) + '\n') 

        found = True 

       else: 
        temp_file.write(ID + '\n') 
        temp_file.write(item + '\n') 
        temp_file.write(str(int(qty)) + '\n') 
        temp_file.write(str(price) + '\n') 

       ID = inventoryFile.readline() 

      if found: 
       print('The file has been updated.') 
      else: 
       print('That item was not found in the file.') 

       inventoryFile.close() 
       temp_file.close() 

       os.remove('inventory.txt') 

       os.rename('UpdatedInventory.txt', 'inventory.txt') 

       print('Inventory has been updated.') 
       break 

    return search 


def main(): 
    all_items = readFile() 
    printMenu(all_items) 
    modify() 


main() 

私はそれが助けてくれることを願っています！

Answer 2

あなたはプログラムを踏んでみましたか？あなたが情報に

を失っているいくつかの点で https://docs.python.org/2/library/pdb.htmlまたはhttps://docs.python.org/3/library/pdb.html

（そのハード悲しいことに、コードの大きなブロックをトラブルシューティングするために）