Python-将函数值转换为int或float进行比较
所以本质上，我是在模拟一个现金箱，在那里我接收硬币并建立用户信用，然后当用户请求购买某个项目时，我检查以确保他们对该项目有足够的信用 我遇到的问题是，当我使用haveYou函数时，我会尝试比较price和credit这两个值 在当前版本的代码中，self.price只是在CashBox中设置为35。init，因此Selector.select（）中的if语句可以正常工作 如果我在init函数中包含self.price=0，它将保持该值，并表示信用和价格相等，因此它将继续 如果我尝试返回self.credit>=self.price，引用getPrice方法的返回，它会说我无法将int与函数值进行比较。我已经检查过了，这肯定是自定价的问题 所以我的问题是，如何将函数值转换为int，或者首先将getPrice的返回设置为int？我已经看过了，但是互联网上充斥着int到string的东西，我找不到任何关于这个的东西。 这一次，我的头撞在桌子上大约5个小时，非常感谢您的帮助。多谢各位Python-将函数值转换为int或float进行比较,python,Python,所以本质上，我是在模拟一个现金箱，在那里我接收硬币并建立用户信用，然后当用户请求购买某个项目时，我检查以确保他们对该项目有足够的信用 我遇到的问题是，当我使用haveYou函数时，我会尝试比较price和credit这两个值 在当前版本的代码中，self.price只是在CashBox中设置为35。init，因此Selector.select（）中的if语句可以正常工作 如果我在init函数中包含self.price=0，它将保持该值，并表示信用和价格相等，因此它将继续 如果我尝试返回self.
import time
import sys
class CashBox(object):
def __init__(self):
self.credit = 0
self.totalReceived = 0
#self.price = 35
def deposit(self,amount):
self.credit = amount + self.credit
self.totalReceived = amount + self.totalReceived
print(self.credit)
print(type(self.credit))
return self.credit
def returnCoins(self):
print("Returning ", self.credit/100, " dollars.")
self.totalReceived = 0
def haveYou(self,amount):
price = Product.getPrice
return self.credit >= price
def deduct(self,amount):
pass
def totalCoins(self):
return self.totalReceived
class CoffeeMachine(object):
def __init__(self):
self.cashBox = CashBox()
self.credit = CashBox.__init__
self.selector = self.cashBox
def oneAction(self):
while True:
command = input("""
______________________________________________________
PRODUCT LIST: all 35 cents, except bouillon (25 cents)
1=black, 2=white, 3=sweet, 4=sweet & white, 5=bouillon
Sample Commands: insert 25, select 1, cancel, quit.
Your command:
""")
words = command.lower().split()
if 'select' in words:
Selector.select(self,int(words[1]))
elif 'insert' in words:
coinsAllowed = [5,10,25,50]
if int(words[1]) in coinsAllowed:
self.cashBox.deposit(int(words[1]))
else:
print("""
That is not one of the allowed coins,
please insert a penny, nickel, dime, quarter,
or half-dollar. Thank you.
""")
elif 'cancel' in words:
print("Cancelling transaction. Returning to main menu: ")
self.cashBox.returnCoins()
elif 'quit' in words:
print("Have a nice day!")
break
else:
print("That is not an option")
def totalCash(self):
return self.cashBox.totalReceived
class Product(object):
def __init__(self,name,price,recipe):
self.name = name
self.price = price
self.recipe = recipe
def getPrice(self):
return self.price
def make(self):
for item in self.recipe:
print("dispensing", item)
time.sleep(0.5)
print("Enjoy your", self.name)
time.sleep(0.5)
print(self.price)
class Selector(object):
def __init__(self):
#self.Product = Product()
self.cashBox = CashBox()
self.credit = CashBox.deposit
#self.products.append(Product.
def select(self, choiceIndex):
recipes = {
1 : ["Black coffee",35,["cup", "coffee", "water"]],
2 : ["White coffee",35,["cup", "coffee", "creamer", "water"]],
3 : ["Sweet coffee",35,["cup", "coffee", "sugar", "water"]],
4 : ["White & Sweet coffee",35,["cup", "coffee", "sugar", "creamer", "water"]],
5 : ["Bouillon",25,["cup bouillonPowder", "water"]]
}
if choiceIndex in range(1,len(recipes)+1):
if self.cashBox.haveYou(self.credit) == True:
self.choiceIndex = choiceIndex
self.recipe = recipes.get(choiceIndex)
#print(self.recipe,"Great selection")
product = Product(*self.recipe)
price = CashBox.haveYou(*self.recipe)
product.make()
else:
print("You don't have enough credit for that, please insert more money.")
else:
print("That selection does not exist")
def main():
m = CoffeeMachine()
while m.oneAction():
pass
total = m.totalCash()
print(f"Total Cash: ${total/100:.2f}")
if __name__ == "__main__":
Exception has occurred: AttributeError
'int' object has no attribute 'price'
File "C:\Users\Tanner Harmer\Desktop\Coffee2\CashBox.py", line 81, in getPrice
return self.price
File "C:\Users\Tanner Harmer\Desktop\Coffee2\CashBox.py", line 22, in haveYou
price = Product.getPrice(self.price) + self.price
File "C:\Users\Tanner Harmer\Desktop\Coffee2\CashBox.py", line 108, in select
if self.cashBox.haveYou(self.credit) == True:
File "C:\Users\Tanner Harmer\Desktop\Coffee2\CashBox.py", line 50, in oneAction
Selector.select(self,int(words[1]))
File "C:\Users\Tanner Harmer\Desktop\Coffee2\CashBox.py", line 122, in main
while m.oneAction():
File "C:\Users\Tanner Harmer\Desktop\Coffee2\CashBox.py", line 128, in <module>
main()
（）price = Product.getPrice
return self.credit >= price
price=Product（）.getPrice（）
返回self.credit>=价格
import math
class PecuniaryPurse:
currency_codes = frozenset((
"EUR", "USD", "GBP", "JPY", "CHF",
"AUD", "CAD"
))
@classmethod
def to_int(cls, amount):
if isinstance(amount, cls):
_amount_int = amount._amount
else:
_amount_flt = float(str(amount))
_amount_int = int(amount)
if not math.isclose(amount, _amount_flt):
raise ValueError()
return _amount_int
def __init__(self, currency_code, _amount = 0):
try:
assert (currency_code in self.currency_codes)
self._currency_code = currency_code
self._amount = type(self).to_int(_amount)
finally:
pass
def __str__(self):
return ''.join(str(x) for x in (
self._currency_code,
" ",
str(self._amount // 100),
".",
str(self._amount % 100)
))
def __add__(self, other):
if isinstance(other, type(self)):
assert(self._currency_code == other._currency_code)
return type(self)(self._currency_code, self._amount + other._amount)
else:
other = type(self).to_int(other)
return type(self)(self._currency_code, self._amount + other)
PP = PecuniaryPurse
p = PP("USD", 1234) + PP("USD", 99)
print(p) # USD 13.33
我试过了，但是getPrice（）缺少1个必需的位置参数：“self”，或者如果我将self放入其中：“CashBox”对象没有属性“price”，我会在CashBox中包含它，而不会覆盖新参数value@T_lastname看见now@T_lastname这三个值应该是名称、价格和价格。谢谢你，我不得不多走几步，但你让我做到了。非常感谢你。我会将结果发布给任何需要了解我如何解决问题的人it@T_lastname乐于帮助：-）这里有太多的代码，无法真正解决问题，而且也不清楚您要做什么。例如，你能用自己的话解释一下，你希望通过像
self.credit=CashBox.\uuu init\uuuuprice = Product.getPrice
return self.credit >= price
price = Product(<Here put the 3 values that this class needs>).getPrice()
return self.credit >= price
import time
import sys
class CashBox(object):
def __init__(self):
self.credit = 0
self.totalReceived = 0
#self.price = 35
def deposit(self,amount):
self.credit = amount + self.credit
self.totalReceived = amount + self.totalReceived
print(self.credit)
print(type(self.credit))
return self.credit
def returnCoins(self):
print("Returning ", self.credit/100, " dollars.")
self.totalReceived = 0
def haveYou(self,name,price,recipe):
return self.credit >= price
def deduct(self,amount):
pass
def totalCoins(self):
return self.totalReceived
class CoffeeMachine(object):
def __init__(self):
self.cashBox = CashBox()
self.credit = CashBox.__init__
self.selector = self.cashBox
def oneAction(self):
while True:
command = input("""
______________________________________________________
PRODUCT LIST: all 35 cents, except bouillon (25 cents)
1=black, 2=white, 3=sweet, 4=sweet & white, 5=bouillon
Sample Commands: insert 25, select 1, cancel, quit.
Your command:
""")
words = command.lower().split()
if 'select' in words:
Selector.select(self,int(words[1]))
elif 'insert' in words:
coinsAllowed = [5,10,25,50]
if int(words[1]) in coinsAllowed:
self.cashBox.deposit(int(words[1]))
else:
print("""
That is not one of the allowed coins,
please insert a penny, nickel, dime, quarter,
or half-dollar. Thank you.
""")
elif 'cancel' in words:
print("Cancelling transaction. Returning to main menu: ")
self.cashBox.returnCoins()
elif 'quit' in words:
print("Have a nice day!")
break
else:
print("That is not an option")
def totalCash(self):
return self.cashBox.totalReceived
class Product(object):
def __init__(self,name,price,recipe):
self.name = name
self.price = price
self.recipe = recipe
def getPrice(self):
return self.price
def make(self):
for item in self.recipe:
print("dispensing", item)
time.sleep(0.5)
print("Enjoy your", self.name)
time.sleep(0.5)
print(self.price)
class Selector(object):
def __init__(self):
#self.Product = Product()
self.cashBox = CashBox()
self.credit = CashBox.deposit
#self.products.append(Product.
def select(self, choiceIndex):
recipes = {
1 : ["Black coffee",35,["cup", "coffee", "water"]],
2 : ["White coffee",35,["cup", "coffee", "creamer", "water"]],
3 : ["Sweet coffee",35,["cup", "coffee", "sugar", "water"]],
4 : ["White & Sweet coffee",35,["cup", "coffee", "sugar", "creamer", "water"]],
5 : ["Bouillon",25,["cup bouillonPowder", "water"]]
}
if choiceIndex in range(1,len(recipes)+1):
self.choiceIndex = choiceIndex
self.recipe = recipes.get(choiceIndex)
product = Product(*self.recipe)
if self.cashBox.haveYou(*self.recipe) == True:
#print(self.recipe,"Great selection")
#price = CashBox.haveYou(*self.recipe)
product.make()
else:
print("You don't have enough credit for that, please insert more money.")
else:
print("That selection does not exist")
def main():
m = CoffeeMachine()
while m.oneAction():
pass
total = m.totalCash()
print(f"Total Cash: ${total/100:.2f}")
if __name__ == "__main__":
main()
import math
class PecuniaryPurse:
currency_codes = frozenset((
"EUR", "USD", "GBP", "JPY", "CHF",
"AUD", "CAD"
))
@classmethod
def to_int(cls, amount):
if isinstance(amount, cls):
_amount_int = amount._amount
else:
_amount_flt = float(str(amount))
_amount_int = int(amount)
if not math.isclose(amount, _amount_flt):
raise ValueError()
return _amount_int
def __init__(self, currency_code, _amount = 0):
try:
assert (currency_code in self.currency_codes)
self._currency_code = currency_code
self._amount = type(self).to_int(_amount)
finally:
pass
def __str__(self):
return ''.join(str(x) for x in (
self._currency_code,
" ",
str(self._amount // 100),
".",
str(self._amount % 100)
))
def __add__(self, other):
if isinstance(other, type(self)):
assert(self._currency_code == other._currency_code)
return type(self)(self._currency_code, self._amount + other._amount)
else:
other = type(self).to_int(other)
return type(self)(self._currency_code, self._amount + other)
PP = PecuniaryPurse
p = PP("USD", 1234) + PP("USD", 99)
print(p) # USD 13.33