print ("\n" * 100)
def weight_rep():
rep = 0
try:
rep = int(input("How many times would you like to enter a weight?\n"))
return rep
except ValueError:
print ("\n" * 100)
print("*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*")
print("You must enter a valid number that is:\n1) Whole\n2) Positive")
print("*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*")
weight_rep()
return rep
rep = weight_rep()
weight = []
for i in range (0, (rep)):
weightn = int(input("Please input weight " + str(i+1) +":\n"))
weight.append(weightn)
print (weight[i])
mean = sum(weight)/int(len(weight))
print("The average weight of these fruits is {0:.2f}g".format(mean))
如果我在第一阶段输入正确的数字,这个简单的代码会按预期进行,但是,当我输入重复weight_rep()函数然后输入内容的东西时,该函数返回nonetype
答案 0 :(得分:1)
这些行:
weight_rep()
return rep
应该成为:
return weight_rep()
虽然我不建议你做过递归调用,但上面的内容将解决你当前的问题。