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程序“goofin.py”要求用户提供一个列表，并且应该从列表中删除奇数并打印出新列表。这是我的代码：

def remodds(lst):
    result = []
    for elem in lst:
        if elem % 2 == 0:          # if list element is even
            result.append(elem)    # add even list elements to the result 
    return result


justaskin = input("Give me a list and I'll tak out the odds: ") #this is 
                                                                #generates 
                                                                #an EOF 
                                                                #error

print(remodds(justaskin))      # supposed to print a list with only even-
                               # numbered elements


#I'm using Windows Powershell and Python 3.6 to run the code. Please help! 

#error message: 

#Traceback (most recent call last):
# File "goofin.py", line 13, in <module>
#    print(remodds(justaskin))
# File "goofin.py", line 4, in remodds
#    if elem % 2 == 0:
#TypeError: not all arguments converted during string formatting
4

2 回答 2

0

这对我来说很好：

def remodds(lst):
    inputted = list(lst)
    result = []
    for elem in inputted:
        if int(elem) % 2 == 0:          
            result.append(elem)
    return result


justaskin = input("Give me a list and I'll tak out the odds: ") 
print(remodds(justaskin))

我的输入：

15462625

我的输出：

['4', '6', '2', '6', '2']

解释：

- convert the input (which was a string) to a list
- change the list element to an integer

希望这可以帮助！

于 2017-11-29T15:28:22.207 回答
0

您的输入lst不是列表，即使您输入类似2, 13, 14, 7or的列表2 13 14 7。当您将其与elem循环分开时，它仍然是一个字符串，这意味着每个单独的字符都是一个循环。您必须先拆分lst并将它们转换为数字。 

def remodds(lst):
    real_list = [int(x) for x in lst.split()]
    result = []
    for elem in real_list:           #and now the rest of your code

split 方法目前使用数字之间的空格，但您也可以定义，例如用逗号分隔元素。

 real_list = [int(x) for x in lst.split(',')]
于 2017-11-29T16:00:02.013 回答