读取换行符分隔文件和丢弃换行符的最佳方法？

Question

我正在尝试确定在Python中读取换行符分隔文件时处理删除换行符的最佳方法.

我想出的是以下代码,包括要测试的一次性代码.

import os

def getfile(filename,results):
   f = open(filename)
   filecontents = f.readlines()
   for line in filecontents:
     foo = line.strip('\n')
     results.append(foo)
   return results

blahblah = []

getfile('/tmp/foo',blahblah)

for x in blahblah:
    print x

建议？

Answer 1

lines = open(filename).read().splitlines()

Answer 2

这是一台能满足您要求的发电机.在这种情况下,使用rstrip足够并且比strip快一点.

lines = (line.rstrip('\n') for line in open(filename))

但是,您很可能也希望使用它来摆脱尾随空格.

lines = (line.rstrip() for line in open(filename))

Answer 3

您如何看待这种方法？

with open(filename) as data:
    datalines = (line.rstrip('\r\n') for line in data)
    for line in datalines:
        ...do something awesome...

生成器表达式避免将整个文件加载到内存中并with确保关闭文件

Answer 4

for line in file('/tmp/foo'):
    print line.strip('\n')