我可以将标准输出重定向到某种字符串缓冲区吗? [英] Can I redirect the stdout into some sort of string buffer?

问题描述

我用python的ftplib写了一个小的FTP客户端，但是包中的一些函数不返回字符串输出，而是打印到stdout.我想将 stdout 重定向到一个我可以从中读取输出的对象.

I'm using python's ftplib to write a small FTP client, but some of the functions in the package don't return string output, but print to stdout. I want to redirect stdout to an object which I'll be able to read the output from.

我知道 stdout 可以重定向到任何常规文件:

I know stdout can be redirected into any regular file with:

stdout = open("file", "a")

但我更喜欢不使用本地驱动器的方法.

But I prefer a method that doesn't uses the local drive.

我正在寻找类似于 Java 中的 BufferedReader 之类的东西，它可用于将缓冲区包装到流中.

I'm looking for something like the BufferedReader in Java that can be used to wrap a buffer into a stream.

推荐答案

from cStringIO import StringIO # Python3 use: from io import StringIO
import sys

old_stdout = sys.stdout
sys.stdout = mystdout = StringIO()

# blah blah lots of code ...

sys.stdout = old_stdout

# examine mystdout.getvalue()

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