从文件中读取行而不会得到"\ n"附加在末尾 [英] to read line from file without getting "\n" appended at the end

问题描述

我的文件是"xml.txt"，具有以下内容:

My file is "xml.txt" with following contents:

books.xml 
news.xml
mix.xml

如果我使用readline()函数，它将在所有文件的名称后附加"\ n"，这是一个错误，因为我想打开xml.txt中包含的文件.我是这样写的:

if I use readline() function it appends "\n" at the name of all the files which is an error because I want to open the files contained within the xml.txt. I wrote this:

fo = open("xml.tx","r")
for i in range(count.__len__()): #here count is one of may arrays that i'm using
    file = fo.readline()
    find_root(file) # here find_root is my own created function not displayed here

在运行此代码时遇到错误:

error encountered on running this code:

IOError: [Errno 2] No such file or directory: 'books.xml\n'

推荐答案

要在结尾处仅删除换行符:

To remove just the newline at the end:

line = line.rstrip('\n')

readline保留换行符的原因是，您可以区分空白行(具有换行符)和文件末尾(空字符串).

The reason readline keeps the newline character is so you can distinguish between an empty line (has the newline) and the end of the file (empty string).

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