请解决这个问题

debugcn 发表于 Dev

米兰·哈林德兰|

我不断收到这样的错误。这是一个餐厅代码，其中打印了菜单并接受了订单，但是在将订单和费用写入文件文本时出错，

我试图以字典的形式制作菜单，但无法在文本文件中写入数据

class restaurant():
  def __init__(self):
    self.name = ""
    self.menu = {}
    self.order = []
    self.bill = 0
  def print_menu(self):
    print "MENU CARD"
    self.menu = {'BBQ Grill':'50','Chicken Gollati':'80','French fries':'60',
            'Hara Bara Kabab':'90','Makani Special Dum Biriyani':'100',
             'Egg Jumbo Sandwich':'120','Roasted Prawn   Salad':'90',
              'Parathas':'80','Turkish Barbeque Plate':'100'}
    for item in self.menu:
      print item,"-",self.menu[item]
  def takeorder(self):
    f1 = open("billlog.txt","w")
    print "What would you like to order?"
    ans = "y"
    while ans == "y":
      food = raw_input("enter order - ")
      self.bill += int(self.menu[food])
      ans = raw_input("go on?(y/n): ")
      f1.write(food)
      f1.write("\t\t")
      f1.write(self.bill)
      print food,"\t\t\t",self.bill
    f1.close()
  def readfilebilllogs(self):
    f1 = open("billlog.txt","r")
    f1.read()
    f1.close()
r = restaurant()
r.print_menu()
r.takeorder()
r.readfilebilllogs()

shubham003

您的代码有多个错误。试试这个，它应该可以工作。我尝试使用python3并针对python2.7进行了修改，因此可能会出现一些语法错误。我已经解释了评论中的错误

class restaurant():
  def __init__(self):
    self.name = ""
    self.menu = {}
    self.order = []
    self.bill = 0
  def print_menu(self):
    print "MENU CARD"
##This should be self.menu instead of just menu. If you use just menu it's a local variable which can't be used from other function
    self.menu = {'BBQ Grill':'50','Chicken Gollati':'80','French fries':'60',
            'Hara Bara Kabab':'90','Makani Special Dum Biriyani':'100',
             'Egg Jumbo Sandwich':'120','Roasted Prawn   Salad':'90',
              'Parathas':'80','Turkish Barbeque Plate':'100'}
#Again self.menu
    for item in self.menu:
      print item,"-",self.menu[item]
  def has_item(self):
    name = raw_input("Enter name of costumer: ")
    food = raw_input("Enter order: ")
    for i in self.menu:
      if i == food:
        print "Yes"
      else:
        print "No"

# The first parameter is always instance of the class (self).
  def takeorder(self):
    print "What would you like to order?"
    ans = "y"
    while ans == "y":
      food = raw_input("enter order - ")
# Instead of bill it should be self.bill
#Convert string value of cost to int while adding
      self.bill += int(self.menu[food])
      ans = raw_input("go on?(y/n): ")
    print self.bill
r = restaurant()
r.print_menu()
r.takeorder()

本文收集自互联网，转载请注明来源。

如有侵权，请联系[email protected] 删除。