[Python]比较两个zip文件的功能，一个位于FTP目录中，另一个位于我的本地计算机上 [英] [Python]Function that compares two zip files, one located in FTP dir, the other on my local machine

问题描述

我有一个创建函数的问题，该函数比较两个zip文件(如果它们相同，不仅按名称).这是我的代码示例:

I have an issue creating function that compare two zip files(if they are the same, not only by name). Here is example of my code:

def validate_zip_files(self):
    host = '192.168.0.1'
    port = 2323
    username = '123'
    password = '123'
    ftp = FTP()
    ftp.connect(host, port)
    ftp.login(username,password)
    ftp.cwd('test')
    print ftp.pwd()
    ftp.retrbinary('RETR test', open('test.zip', 'wb').write)
    file1=open('test.zip', 'wb')
    file2=open('/home/user/file/text.zip', 'wb')
    return filecmp.cmp(file1, file2, shallow=True)

问题之一是第二个zip文件位于不同的位置('/home/user/file/text.zip')，我正在从python脚本所在的目录中下载该zip文件.我不是100％确定filecmp.cmp可与.zip文件一起使用.

One of the problems is that the second zip is in different location('/home/user/file/text.zip') and i am downloading the zip file in the dir where my python script is. I am not 100% sure that filecmp.cmp works with .zip files.

任何想法都很棒:)谢谢.

Any ideas would be great :) Thanks.

推荐答案

我将直接比较文件的哈希值，而不是直接比较文件.这消除了 filecmp 的依赖性，这可能-如您所说-不适用于压缩文件.

Rather than comparing the files directly, I would go ahead and compare hashed values of the files. This eliminates the dependency of filecmp, which might -as you said - not work with zipped files.

import hashlib

def compare_files(a,b):
    fileA = hashlib.sha256(open(a, 'rb').read()).digest()
    fileB = hashlib.sha256(open(b, 'rb').read()).digest()
    if fileA == fileB:
        return True
    else:
        return False

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