在Python中，如何在循环中获得求和和和平均值

Question

我已经成功地实现了一个循环，但是当我尝试sum函数时，仍然会遇到语法错误。我需要用户输入的数字总和和平均数，以及。必须将其输出给用户。你能告诉我该怎么走吗，谢谢。

这是我目前所做的：

while 1:
    NumCalc = input ("Enter Number :")
    if NumCalc == "done": break

Answer 1

i = 0
sum = 0
while 1:
    i += 1
    NumCalc = input ("Enter Number :")
    if NumCalc == "done": break
    sum = sum + NumCalc
    print "Average is ", sum/i

Answer 2

如果要计算循环结束后的和和和平均值，可以这样做：

nums = []
while 1:
    NumCalc = input ("Enter Number:")
    if NumCalc == "done": break
    nums.append(float(NumCalc))

print('Sum:', sum(nums), 'and average:', sum(nums)/len(nums))

---

当在循环中时： ^{pr2}$

输出：

Enter Number: 5
Sum is 5.0 and the mean is 5.0
Enter Number: 2
Sum is 7.0 and the mean is 3.5
Enter Number: 4
Sum is 11.0 and the mean is 3.66666666667
Enter Number: 6
Sum is 17.0 and the mean is 4.25
Enter Number: 2
Sum is 19.0 and the mean is 3.8