使用python删除文件中的最后一行 [英] Delete final line in file with python

问题描述

如何使用python删除文件的最后一行?

How can one delete the very last line of a file with python?

输入文件示例:

hello
world
foo
bar

输出文件示例:

hello
world
foo

我创建了以下代码来查找文件中的行数-但我不知道如何删除特定的行号.我是python的新手-如果有更简单的方法-请告诉我.

I've created the following code to find the number of lines in the file - but I do not know how to delete the specific line number. I'm new to python - so if there is an easier way - please tell me.

    try:
        file = open("file")
    except IOError:
        print "Failed to read file."
    countLines = len(file.readlines())

---

我用各种各样的答案弄清楚了:大多数是草莓的，还有我在网上看到的东西(对不起，我找不到链接).

I figured it out using a variety of answers: Mostly Strawberry's and something I saw in the web (sorry, I can't find the link).

#!/usr/bin/env python

import os, sys

readFile = open("file")

lines = readFile.readlines()

readFile.close()
w = open("file",'w')

w.writelines([item for item in lines[:-1]])

w.close()

推荐答案

您可以使用上面的代码，然后:-

You could use the above code and then:-

lines = file.readlines()
lines = lines[:-1]

这将为您提供一个包含除最后一行以外的所有行的行数组.

This would give you an array of lines containing all lines but the last one.

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