python - 为什么返回Nonetype？

This question already has an answer here:

Why does the print function return None?
                                
                                    （1个答案）
                                
                        
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我对Python相当陌生。我正在生成一个发电机，用于估算面包店制作蛋糕所需要花费的费用。虽然这里有些问题

Batches = print("Batches of Cupcakes:", math.ceil(People * Ingredients / 12))

Labor = print("Hours of labor:", Batches * 1.25)

我收到此错误：

TypeError: unsupported operand type(s) for *: 'NoneType' and 'float'

最佳答案

因为print始终返回None。您要将先前的结果保存到变量中：

batches = math.ceil(people * ingredients/12)
labor = batches * 1.25

print("Batches of cupcakes:", batches)
print("Hours of labor:", labor)

关于python - 为什么返回Nonetype？ ，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/39802548/