Python中的二进制缓冲区 [英] Binary buffer in Python

问题描述

在Python中，您可以使用 StringIO 获取字符数据的文件缓冲区。 内存映射文件基本上对二进制数据执行类似操作，但它需要一个文件用作基础。 Python是否有一个用于二进制数据的文件对象，并且只是内存，相当于Java的 ByteArrayOutputStream ？

In Python you can use StringIO for a file-like buffer for character data. Memory-mapped file basically does similar thing for binary data, but it requires a file that is used as the basis. Does Python have a file object that is intended for binary data and is memory only, equivalent to Java's ByteArrayOutputStream?

我的用例是我想在内存中创建一个ZIP文件，并且 ZipFile 需要一个类似文件的对象。

The use-case I have is I want to create a ZIP file in memory, and ZipFile requires a file-like object.

推荐答案

您可能正在寻找 io.BytesIO 课程。它的工作原理与StringIO完全相同，只是它支持二进制数据：

You are probably looking for io.BytesIO class. It works exactly like StringIO except that it supports binary data:

from io import BytesIO
bio = BytesIO(b"some initial binary data: \x00\x01")

StringIO将抛出TypeError：

StringIO will throw TypeError:

from io import StringIO
sio = StringIO(b"some initial binary data: \x00\x01")

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