类型错误:“_io.TextIOWrapper"对象不可下标 [英] TypeError: '_io.TextIOWrapper' object is not subscriptable

问题描述

正如标题所说的那样出现错误.这是回溯.我知道 lst[x] 导致了这个问题，但不太确定如何解决这个问题.我已经搜索了 google + stackoverflow，但没有得到我正在寻找的解决方案.

Getting the error as the title says. Here is the traceback. I know lst[x] is causing this problem but not too sure how to solve this one. I've searched google + stackoverflow already but did not get the solution I am looking for.

Traceback (most recent call last):
File "C:/Users/honte_000/PycharmProjects/Comp Sci/2015/2015/storelocation.py", line 30, in <module>
main()
File "C:/Users/honte_000/PycharmProjects/Comp Sci/2015/2015/storelocation.py", line 28, in main
print(medianStrat(lst))
File "C:/Users/honte_000/PycharmProjects/Comp Sci/2015/2015/storelocation.py", line 24, in medianStrat
return lst[x]
TypeError: '_io.TextIOWrapper' object is not subscriptable

实际代码如下

def medianStrat(lst):
    count = 0
    test = []
    for line in lst:
        test += line.split()
        for i in lst:
            count = count +1
            if count % 2 == 0:
                x = count//2
                y = lst[x]
                z = lst[x-1]
                median = (y + z)/2
                return median
            if count %2 == 1:
                x = (count-1)//2
                return lst[x]     # Where the problem persists

def main():
    lst = open(input("Input file name: "), "r")
    print(medianStrat(lst))

那么这个问题的解决方案是什么，或者可以做些什么来使代码工作?(代码应该做的主要功能是打开文件并获取中位数)

So what could be the solution to this problem or what could be done instead to make the code work? ( The main function that the code should do is to open a file and get the median )

推荐答案

你不能索引 (__getitem__) _io.TextIOWrapper 对象.您可以做的是使用 list 行.在您的代码中试试这个:

You can't index (__getitem__) a _io.TextIOWrapper object. What you can do is work with a list of lines. Try this in your code:

lst = open(input("Input file name: "), "r").readlines()

此外，您没有关闭 file 对象，这样会更好:

Also, you aren't closing the file object, this would be better:

with open(input("Input file name: ", "r") as lst:
    print(medianStrat(lst.readlines()))

with 确保文件被关闭，参见 docs

with ensures that file get closed, see docs

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