python字符串'"':字符串内的单双引号 [英] python string ' " ' : single double quote inside string

问题描述

双引号如下所示.如果将其放在python字符串中，则会得到此''.在python中，我可以将两个双引号放在字符串'"'中，并将其打印为两个双引号.但是，我不能像以前一样在字符串中加上单引号''.我在Eclipse中使用pydev进行此操作，并且给出了错误:"遇到"\ r"(13)，在:" 之后.我正在尝试使用命令管道和文件名执行以下操作:

A double quote looks like this ". If I put this inside a python string I get this ' " '. In python, I can put two double quotes in a string ' "" ' and this gets printed as two double quotes. However, I cannot put a single double quote in a string, as before, ' " '. I am doing this in eclipse with pydev and it gives an error: "encountered "\r" (13), after : "". I am trying to do the following with command pipe and file names:

logA = 'thing.txt'
cmdpipe = os.popen('copy "C:\upe\' + logA + '"' + ' "C:\upe\log.txt"') 

推荐答案

您需要转义反斜杠，否则会做奇怪的事情.

You need to escape the backslashes, otherwise it will do odd things.

logA = 'thing.txt'
cmdpipe = os.popen(
    'copy "C:\\upe\\' + logA + '"' + ' "C:\\upe\\log.txt"')

更加Python化的方式是这样的:

A more pythonic way would be this though:

logA = 'thing.txt'
cmdpipe = os.popen('copy "C:\\upe\\{}" "C:\\upe\\log.txt"'.format(logA))

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