Question

我不明白为什么列表索引超出范围。因为当我分割文件'very_short.csv'时，它分为三部分。例如，它分手机场，2007,175702。机场是文本[0]，2007年是文本[1]，175702是文本[2]。所以当我调用newYearCount = createYearCount（int（text [1]），int（text [2]））时，它是如何超出范围的？

这是我得到的错误......

>>> import wordData
>>> words = wordData.readWordFile('very_short.csv')
Traceback (most recent call last):
File "<pyshell#1>", line 1, in <module>
words = wordData.readWordFile('very_short.csv')
File "/Users/lol/Desktop/lol's Windows/CS/CS1/hw/uni/wordData.py", line 31, in readWordFile
newYearCount = createYearCount(int(text[1]), int(text[2]))
IndexError: list index out of range


class YearCount(rit_object):
    __slots__ = ('year', 'count')
    _types    = (int    ,  int  )


def createYearCount(year, count):
    return YearCount(year, count)

def readWordFile(fileName):
    result = {}
    for line in fileName:
        text = line.split(',')
        wordy = text[0]
        print(text)
        if len(text) > 1:
            newYearCount = createYearCount(int(text[1]), int(text[2]))
            if line not in result:
                result[wordy] = [newYearCount]
            else:
                result[wordy].append(newYearCount)
        else:
            return ''
    return result

def main():
    fileName = input('Enter filename: ')
    print(readWordFile(open(fileName)))

main()

这就是我的very_short.csv文件中的内容：

airport, 2007, 175702
airport, 2008, 173294
request, 2005, 646179
request, 2006, 677820
request, 2007, 697645
request, 2008, 795265
wandered, 2005, 83769
wandered, 2006, 87688
wandered, 2007, 108634
wandered, 2008, 171015

感谢。

编辑：

Enter filename: very_short.csv
['airport', ' 2007', ' 175702\n']
['airport', ' 2008', ' 173294\n']
['request', ' 2005', ' 646179\n']
['request', ' 2006', ' 677820\n']
['request', ' 2007', ' 697645\n']
['request', ' 2008', ' 795265\n']
['wandered', ' 2005', ' 83769\n']
['wandered', ' 2006', ' 87688\n']
['wandered', ' 2007', ' 108634\n']
['wandered', ' 2008', ' 171015\n']
{'request': [YearCount( year=2008, count=795265 )], 'airport': [YearCount( year=2008, count=173294 )], 'wandered': [YearCount( year=2008, count=171015 )]}
Enter a word to calculate the count: airport
['v']
0

Answer 1

尝试在字符串之前打印text，这会给您带来错误。最有可能的是，文件末尾有一个空行，它会拆分为单值列表。

而不是

    newYearCount = createYearCount(int(text[1]), int(text[2]))

使用

if len(text)>1:
    newYearCount = createYearCount(int(text[1]), int(text[2]))
        if line not in result:
            result[word] = [newYearCount]
        else:
            result[word].append(newYearCount)
else:
    return ''

IndexError：使用dict列出索引超出范围

1 个答案: