Here's my code. I am trying to get user input of integers, go through a function utilizing map and returning a list of cubed results

Question

I am using Python 3

vals = int(input("Enter comma separated numbers"))

def cube(nums):
    return nums**3

print(list(map(cube,vals)))

I get this error when I input 2,3

#Traceback (most recent call last):
  File "/Users/administrator/Documents/Python/Master Python/Day7a.py", line 15, in <module>
    vals = int(input("Enter comma separated numbers"))
ValueError: invalid literal for int() with base 10: '2,3'

This works when I put the integers myself, though:

vals = [2,3]
def cube(nums):
    return nums**3

alist = (list(map(cube,vals)))

Answer 1

您应先将用户的输入转换为整数序列（或浮点数，如果需要的话），然后才能映射vals以执行数字运算：

vals = map(int, input("Enter comma separated numbers").split(','))