Python-使用请求将文件直接下载到内存

Question

目的是从Internet下载文件，并从中创建文件对象或类似文件的文件，而无需使其接触硬盘驱动器。这仅是出于我的知识，想知道它是否可能或可行，尤其是因为我想看看是否可以绕过必须编写文件删除行的代码。

通常，这就是我从网络上下载内容并将其映射到内存的方式：

import requests
import mmap

u = requests.get("http://www.pythonchallenge.com/pc/def/channel.zip")

with open("channel.zip", "wb") as f: # I want to eliminate this, as this writes to disk
    f.write(u.content)

with open("channel.zip", "r+b") as f: # and his as well, because it reads from disk
    mm = mmap.mmap(f.fileno(), 0)
    mm.seek(0)
    print mm.readline()
    mm.close() # question: if I do not include this, does this become a memory leak?

Answer 1

这就是我最终要做的。

import zipfile 
import requests
import StringIO

u = requests.get("http://www.pythonchallenge.com/pc/def/channel.zip")
f = StringIO.StringIO() 
f.write(u.content)

def extract_zip(input_zip):
    input_zip = zipfile.ZipFile(input_zip)
    return {i: input_zip.read(i) for i in input_zip.namelist()}
extracted = extract_zip(f)