Question

我遇到了这个问题。当我运行此代码时，使用上面的文件，它给了我索引超出范围的错误。

f = open(sys.argv[1], 'r')
file_contents = [x.split('\t')[2:5] for x in f.readlines()]
#Set the variables for average and total for cities

total = 0
city = set()
for line in file_contents:
     print(line[0])

这是文件的内容

2012-01-01  09:00   San Jose    Men's Clothing  214.05  Amex
2012-01-01  09:00   Fort Worth  Women's Clothing    153.57  Visa
2012-01-01  09:00   San Diego   Music   66.08   Cash
2012-01-01  09:00   Pittsburgh  Pet Supplies    493.51  Discover
2012-01-01  09:00   Omaha   Children's Clothing 235.63  MasterCard

Answer 1

您需要在读取文件后关闭文件，建议的做法是使用with语句将其自动关闭；

with open(sys.argv[1], 'r') as f:
    file_contents = [x.split(' ')[2:5] for x in f.readlines()]
    #Set the variables for average and total for cities

total = 0
city = set()
for line in file_contents:
     print(line[0])

但是，您遇到的问题是将行用\t分隔，请使用空格，它应该可以为您提供所需的内容。

输出

关于索引超出范围的Python3问题

1 个答案: