Question

我真的不了解python压缩，因为每当我尝试压缩文件夹或文件时，我最终得到的文件比原始文件大5.5倍。为什么会这样？有什么办法可以用python压缩文件夹或文件，并获得最多与原始文件大小相同的输出？这是我正在使用的代码。

import os, zipfile

def zipfiles(filename, destname):
  try:
   zf = zipfile.ZipFile(destname, 'w', zipfile.ZIP_DEFLATED)
   for dirname, subdirs, files in os.walk(filename):
      zf.write(dirname)
      for filename in files:
          zf.write(os.path.join(dirname, filename))
   zf.close()
  except Exception, e:
   print str(e)
def main():
   x = raw_input('Enter Filename:   ')
   while len(x) == 0:
       x = raw_input('Enter Filename:   ')
   y = raw_input('Enter destination name:   ')
   while len(y) == 0:
       y = raw_input('Enter destination name:   ')
   zipfiles(x, y+'.zip')
main()

Answer 1

确保目标.zip文件不在您正在压缩的文件夹中，否则您的脚本可能会将自身的副本添加到自身 - 这显然会使其更大。

以下是您的代码的修订版本，该代码将在同一目录文件夹中创建时跳过存档：

import os, zipfile

def zipfiles(source_folder, destination_name):
    source_folder = os.path.abspath(source_folder)
    destination_path = os.path.abspath(destination_name)
    try:
        with zipfile.ZipFile(destination_name, 'w', zipfile.ZIP_DEFLATED) as zf:
            for dirname, subdirs, files in os.walk(source_folder):
                # zf.write(dirname) # not needed
                for filename in files:
                    filepath = os.path.join(dirname, filename)
                    if filepath != destination_path:
                        zf.write(filepath)
    except Exception as e:
        print(e)

def main():
   x = ''
   while not x:
       x = raw_input('Enter source folder name: ')
   y = ''
   while not y:
       y = raw_input('Enter destination archive file name: ')
   zipfiles(x, y+'.zip')

main()

为什么压缩输出更大的zip文件

1 个答案: