在命令提示符中使用 sys.argv 列表

Question

带有

input("Enter data")

的代码有效，但是一旦我将其更改为

sys.argv

，它就不起作用了。有什么建议吗？

这是程序代码：

import sys
try:

    listOfNumbers = list(sys.argv[1])
    listOfEvenNumbers = []
    listOfOddNumbers = []
    for x in listOfNumbers:
        if x % 2 == 0:
            listOfEvenNumbers.append(x)
        elif x % 2 != 0:
            listOfOddNumbers.append(x)

    countOfEvenNumbers = len(listOfEvenNumbers)
    countOfOddNumbers = len(listOfOddNumbers)
    sumOfEvenNumbers = sum(listOfEvenNumbers)
    sumOfOddNumbers = sum(listOfOddNumbers)
    highestNumber = max(listOfNumbers)
    lowestNumber = min(listOfNumbers)
    differenceBetweenNumbers = highestNumber - lowestNumber
    sumOfCenteredNumbers = sum(listOfNumbers) - highestNumber - lowestNumber
    countOfCenteredNumbers = len(listOfNumbers) - 2
    centeredAverage = sumOfCenteredNumbers/countOfCenteredNumbers
    print("The sum of all even numbers is %i, the sum of all odd numbers is %i,the difference between the biggest and smallest number is %i, the total number of even numbers is %i, the total number of odd numbers is %i,the centered average is %i.")% (sumOfEvenNumbers, sumOfOddNumbers, differenceBetweenNumbers, countOfEvenNumbers, countOfOddNumbers, centeredAverage)

except:
    print("Your input is invalid!")

这是命令提示符中使用的行：

evenOddCalculator.py 1,2,3,4

给出结果：

Your input is invalid!

Answer 1

您的输入无效，因为您的列表也包含逗号 (',')。 为了删除它们，您可以使用以下行：

listOfNumbers = list(sys.argv[1].split(','))

Answer 2

我通过这样做让它工作：

strOfNumbers = sys.argv[1]
listOfNumbers= [int(x) for x in strOfNumbers.split(',')]

Answer 3

这是工作代码-

import sys
try:

    listOfNumbers_str = list(sys.argv[1:])
    #print listOfNumbers_str
    listOfEvenNumbers = []
    listOfOddNumbers = []
    listOfNumbers = [int(i) for i in listOfNumbers_str]
    #print listOfNumbers

    for x in listOfNumbers:
        if x % 2 == 0:
            listOfEvenNumbers.append(x)
        elif x % 2 != 0:
            listOfOddNumbers.append(x)

    countOfEvenNumbers = len(listOfEvenNumbers)
    countOfOddNumbers = len(listOfOddNumbers)
    sumOfEvenNumbers=sum(listOfEvenNumbers)
    sumOfOddNumbers=sum(listOfOddNumbers)
    highestNumber=max(listOfNumbers)
    lowestNumber=min(listOfNumbers)
    differenceBetweenNumbers = highestNumber - lowestNumber
    sumOfCenteredNumbers = sum(listOfNumbers) - highestNumber - lowestNumber
    countOfCenteredNumbers = len(listOfNumbers) - 2
    centeredAverage = sumOfCenteredNumbers/countOfCenteredNumbers
    print("The sum of all even numbers is %i, the sum of all odd numbers is %i,the difference between the biggest and smallest number is %i, the total number of even numbers is %i, the total number   of odd numbers is %i,the centered average is %i.")% (sumOfEvenNumbers,sumOfOddNumbers,differenceBetweenNumbers,countOfEvenNumbers,countOfOddNumbers,centeredAverage)

except:
    print("Your input is invalid!")

我改变的几件事 -

1. sys.argv[1:]

给出从索引 1 到结束的所有元素

2. listOfNumbers = [int(i) for i in listOfNumbers_str]

sys.argv 返回一个字符串元素数组而不是整数，我在这里使用列表理解从字符串列表中构建一个整数列表。

运行程序->

$ python calc.py 1 2 3 4
['1', '2', '3', '4']
[1, 2, 3, 4]
The sum of all even numbers is 6, the sum of all odd numbers is 4,the difference between the biggest and smallest number is 3, the total number of even numbers is 2, the total number of odd numbers is 2,the centered average is 2.