python程序给出错误（分数背包问题）

Question

python的分数背包问题当我运行代码时，它给出了一个错误，就是split函数不能处理整数值。你知道吗

Traceback (most recent call last):
  File "C:/Users/Akshay/Desktop/python/kapsack_problem.py", line 49, in <module>
    .format(n)).split()
  File "<string>", line 1
    60 100 120
         ^
SyntaxError: invalid syntax 

下面是一个Python程序的源代码，该程序使用贪心算法来解决分数背包问题。我做错了什么请告诉我。 提前谢谢。你知道吗

def fractional_knapsack(value, weight, capacity):

    index = list(range(len(value)))
    # contains ratios of values to weight
    ratio = [v/w for v, w in zip(value, weight)]
    # index is sorted according to value-to-weight ratio in decreasing order
    index.sort(key=lambda i: ratio[i], reverse=True)

    max_value = 0
    fractions = [0]*len(value)
    for i in index:
        if weight[i] <= capacity:
            fractions[i] = 1
            max_value += value[i]
            capacity -= weight[i]
        else:
            fractions[i] = capacity/weight[i]
            max_value += value[i]*capacity/weight[i]
            break

    return max_value, fractions


n = int(input('Enter number of items: '))
value = input('Enter the values of the {} item(s) in order: '
              .format(n)).split()
value = [int(v) for v in value]
weight = input('Enter the positive weights of the {} item(s) in order: '
               .format(n)).split()
weight = [int(w) for w in weight]
capacity = int(input('Enter maximum weight: '))

max_value, fractions = fractional_knapsack(value, weight, capacity)
print('The maximum value of items that can be carried:', max_value)
print('The fractions in which the items should be taken:', fractions)

Answer 1

似乎您试图用Python 2.x解释器运行此代码，而您的代码是用Python 3编写的。为了能够运行它，您需要检查机器上是否安装了Python 3（有关安装说明，请参见here）。
跑，跑

python3 my_script.py

在终端。
另一种可能是粘贴

#!/usr/bin/env python3

在python脚本的顶部。然后，如果您使该文件可执行（例如在ubuntu上运行chmod +x myscript.py），那么您就可以使用

./my_script.py