Python 字符串替换错误 [英] Python String Replace Error

问题描述

我有一个 python 脚本，它不断返回以下错误:

I have a python script that keeps returning the following error:

TypeError: replace() 需要至少 2 个参数(给定 1 个)

TypeError: replace() takes at least 2 arguments (1 given)

我终其一生都无法弄清楚是什么导致了这种情况.

I cannot for the life of me figure out what is causing this.

这是我的代码的一部分:

Here is part of my code:

inHandler = open(inFile2, 'r')
outHandler = open(outFile2, 'w')

for line in inHandler:

    str = str.replace("set([u'", "")
    str = str.replace("'", "")
    str = str.replace("u'", "")
    str = str.replace("'])", "")

outHandler.write(str)

inHandler.close()
outHandler.close()

双引号内的所有内容都需要用空替换.

Everything that is seen within double quotations needs to be replaced with nothing.

所以 set([u' 应该看起来像

So set([u' should look like

推荐答案

这就是你想要做的:

for line in inHandler:
    line = line.replace("set([u'", "")
    line = line.replace("'", "")
    line = line.replace("u'", "")
    line = line.replace("'])", "")

outHandler.write(line)

在文档中，无论在哪里说 str.replace(old,new[,count]) 之类的内容，str 都是示例变量.事实上，str 是一个内置函数，这意味着你永远不想通过将它分配给任何东西来改变它的含义.

On the documentation, wherever it says something like str.replace(old,new[,count]) the str is an example variable. In fact, str is an inbuilt function, meaning you never want to change what it means by assigning it to anything.

line = line.replace("set([u'", "")
  ^This sets the string equal to the new, improved string.

line = line.replace("set([u'", "")
        ^ This is the string of what you want to change.

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