Question

每当我在我的cheapest_shipping函数中输入一个大于10的值时，都会出现无法排序的类型错误。

我尝试制作单独的变量以传递给函数以计算成本。还尝试了其他比较运算符。

cost = 0
pgs = 125

def gsp(weight):
  if weight == 0:
cost = 20
return cost
  elif weight <= 2:
cost = (1.5 * weight + 20)
return cost 
  elif weight > 2 and weight <= 6:
cost = (3 * weight + 20)
return cost
  elif weight > 6 and weight <= 10:
cost = (4 * weight + 20)
return cost
  elif weight > 10:
cost = (4.75 * weight + 20)

def dsp(weight):
  if weight == 0:
cost = 0
return cost
  elif weight <= 2:
cost = (4.5 * weight)
return cost 
  elif weight > 2 and weight <= 6:
cost = (9 * weight)
return cost
  elif weight > 6 and weight <= 10:
cost = (12 * weight)
return cost
  elif weight > 10:
cost = (14.25 * weight)

def cheapest_shipping(weight):
  if gsp(weight) < dsp(weight) and gsp(weight) < pgs:
return "Ground shipping is the cheapest option at $" + str(gsp(weight))
  elif dsp(weight) < gsp(weight) and dsp(weight) < pgs:
return "Drone shipping is the cheapest option at $" + str(dsp(weight))

print (cheapest_shipping(11))

该功能使用我的陆运价格功能和无人机运价功能以及高级陆运成本，并输入重量，并应返回最便宜的运输选项。直到输入超过10才起作用。

Answer 1

在最后一个return cost语句中缺少elif。这可能就是你想要的

cost = 0
pgs = 125


def gsp(weight):
    if weight == 0:
        cost = 20
        return cost
    elif weight <= 2:
        cost = (1.5 * weight + 20)
        return cost
    elif weight > 2 and weight <= 6:
        cost = (3 * weight + 20)
        return cost
    elif weight > 6 and weight <= 10:
        cost = (4 * weight + 20)
        return cost
    elif weight > 10:
        cost = (4.75 * weight + 20)
        return cost


def dsp(weight):
    if weight == 0:
        cost = 0
        return cost
    elif weight <= 2:
        cost = (4.5 * weight)
        return cost
    elif 2 < weight <= 6:
        cost = (9 * weight)
        return cost
    elif 6 < weight <= 10:
        cost = (12 * weight)
        return cost
    elif weight > 10:
        cost = (14.25 * weight)
        return cost


def cheapest_shipping(weight):
    if gsp(weight) < dsp(weight) and gsp(weight) < pgs:
        return "Ground shipping is the cheapest option at $" + str(gsp(weight))
    elif dsp(weight) < gsp(weight) and dsp(weight) < pgs:
        return "Drone shipping is the cheapest option at $" + str(dsp(weight))


print (cheapest_shipping(11))

不可排序的类型：NoneType（）<NoneType（）

1 个答案: