Question

我在使用python解压缩文件时遇到了问题

背景我有大量文件需要在云（crestle.ai）的jupyter笔记本中上载，手动上载是不切实际的，因此我将整个文件夹压缩为文件，然后将其上载到我的个人Google驱动器中，然后得到了一个可共享的链接，使用wget将zip文件下载到juypter笔记本的我的工作区中

问题

我尝试解压缩我上传的文件时遇到的问题是badzipfile错误，我遵循了几个线程的要求，但是没有一种解决方案对我有效

import zipfile
with zipfile.ZipFile("Title.zip","r") as zip_ref:
    zip_ref.extractall("title")

BadZipFile                                Traceback (most recent call last)
<ipython-input-14-552046070dd2> in <module>
      1 import zipfile
----> 2 with zipfile.ZipFile("Title.zip","r") as zip_ref:
      3     zip_ref.extractall("title")

/opt/conda/lib/python3.6/zipfile.py in __init__(self, file, mode, compression, allowZip64)
   1129         try:
   1130             if mode == 'r':
-> 1131                 self._RealGetContents()
   1132             elif mode in ('w', 'x'):
   1133                 # set the modified flag so central directory gets written

/opt/conda/lib/python3.6/zipfile.py in _RealGetContents(self)
   1196             raise BadZipFile("File is not a zip file")
   1197         if not endrec:
-> 1198             raise BadZipFile("File is not a zip file")
   1199         if self.debug > 1:
   1200             print(endrec)

BadZipFile: File is not a zip file

所以我用谷歌搜索并找到了两个可能的解决方案

def fixBadZipfile(zipFile):  
 f = open(zipFile, 'r+b')  
 data = f.read()  
 pos = data.find(b'\x50\x4b\x05\x06') # End of central directory signature  
 if (pos > 0):  
     self._log("Trancating file at location " + str(pos + 22)+ ".")  
     f.seek(pos + 22)   # size of 'ZIP end of central directory record' 
     f.truncate()  
     f.close()  
 else:  
     print("trucatedfile")

以上代码对我的情况没有帮助

import mmap
from io import UnsupportedOperation
from zipfile import BadZipfile

# The end of central directory signature
CENTRAL_DIRECTORY_SIGNATURE = b'\x50\x4b\x05\x06'


def repair_central_directory(zipFile):
    if hasattr(zipFile, 'read'):
        # This is a file-like object
        f = zipFile
        try:
            fileno = f.fileno()
        except UnsupportedOperation:
            # This is an io.BytesIO instance which lacks a backing file.
            fileno = None
    else:
        # Otherwise, open the file with binary mode
        f = open(zipFile, 'rb+')
        fileno = f.fileno()
    if fileno is None:
        # Without a fileno, we can only read and search the whole string
        # for the end of central directory signature.
        f.seek(0)
        pos = f.read().find(CENTRAL_DIRECTORY_SIGNATURE)
    else:
        # Instead of reading the entire file into memory, memory-mapped the
        # file, then search it for the end of central directory signature.
        # Reference: https://stackoverflow.com/a/21844624/2293304
        mm = mmap.mmap(fileno, 0)
        pos = mm.find(CENTRAL_DIRECTORY_SIGNATURE)
        mm.close()
    if pos > -1:
        # size of 'ZIP end of central directory record'
        f.truncate(pos + 22)
        f.seek(0)
        return f
    else:
        # Raise an error to make it fail fast
        raise BadZipfile('File is not a zip file')

repair_central_directory('Title.zip')

---------------------------------------------------------------------------
BadZipFile                                Traceback (most recent call last)
<ipython-input-13-23cfd0f65d89> in <module>
----> 1 repair_central_directory('Title.zip')

<ipython-input-12-64afa597a2dc> in repair_central_directory(zipFile)
     39     else:
     40         # Raise an error to make it fail fast
---> 41         raise BadZipfile('File is not a zip file')

BadZipFile: File is not a zip file

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使用python提取云（crestle.ai）上的zip文件时出现问题

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