27 class VendingMachine(object):
 26     """A vending machine that vends some product for some price.
 25
 24     >>> v = VendingMachine('crab', 10)
 23     >>> v.vend()
 22     'Machine is out of stock.'
 21     >>> v.restock(2)
 20     'Current crab stock: 2'
 19     >>> v.vend()
 18     'You must deposit $10 more.'
 17     >>> v.deposit(7)
 16     'Current balance: $7'
 15     >>> v.vend()
 14     'You must deposit $3 more.'
 13     >>> v.deposit(5)
 12     'Current balance: $12'
 11     >>> v.vend()
 10     'Here is your crab and $2 change.'
  9     >>> v.deposit(10)
  8     'Current balance: $10'
  7     >>> v.vend()
  6     'Here is your crab.'
  5     >>> v.deposit(15)
  4     'Machine is out of stock. Here is your $15.'
  3     """
  2     def __init__(self, __, _______):
  1         self.__ = __
  0         self._______ = _______
  1         self.l__o_O__l = 0
  2         self.____ = 0
  3
  4     def restock(self, count):
  5         self.____ += count
  6         return "Current {0} stock: {1}".format(self.__, self.____)
  7
  8     def deposit(self, ______):
  9         if self.____ == 0:
 10             return "Machine is out of stock. Here is your ${0}.".format(______)
 11
 12         self.l__o_O__l += ______
 13         return "Current balance: ${0}".format(self.l__o_O__l)
 14
 15     def vend(self):
 16         if self.____ == 0:
 17             return "Machine is out of stock."
 18
 19         if self.l__o_O__l > self._______:
 20             change = self.l__o_O__l - self._______
 21             self.l__o_O__l = 0
 22             self.____ -= 1
 23             return "Here is your {0} and ${1} change.".format(self.__, change)
 24         elif self.l__o_O__l == self._______:
 25             self.l__o_O__l = 0
 26             self.____ -= 1
 27             return "Here is your {0}.".format(self.__)
 28         else:
 29             return "You must deposit ${0} more.".format(self._______-self.l__o_O__l)