python 将 \r 文本转换为 \n 以便 readlines() 按预期工作
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Convert \r text to \n so readlines() works as intended
提问by greye
In Python, you can read a file and load its lines into a list by using
在 Python 中，您可以使用以下命令读取文件并将其行加载到列表中
f = open('file.txt','r')
lines = f.readlines()
Each individual line is delimited by \nbut if the contents of a line have \rthen it is not treated as a new line. I need to convert all \rto \nand get the correct list lines.
每个单独的行都由分隔，\n但如果一行的内容有，\r则不会将其视为新行。我需要全部转换\r为\n并获得正确的列表lines。
If I do .split('\r')inside the linesI'll get lists inside the list.
如果我在.split('\r')里面做，lines我会在列表中得到列表。
I thought about opening a file, replace all \rto \n, closing the file and reading it in again and then use the readlines()but this seems wasteful.
我想过打开一个文件，全部替换\r为\n，关闭文件并再次读取它，然后使用 ，readlines()但这似乎很浪费。
How should I implement this?
我应该如何实施？
回答by Ned Deily
f = open('file.txt','rU')
This opens the file with Python's universal newline supportand \ris treated as an end-of-line.
这将打开Python的文件通用换行符支持和\r被视为最终的线。
回答by hughdbrown
If it's a concern, open in binary format and convert with this code:
如果有问题，请以二进制格式打开并使用以下代码进行转换：
from __future__ import with_statement
with open(filename, "rb") as f:
s = f.read().replace('\r\n', '\n').replace('\r', '\n')
lines = s.split('\n')
