Python 7Zip 错误因扫描警告而失败

Question

我在我的 Mac 上使用一个小的 Python 脚本来 7 压缩并加密它。这是我的 Python 代码：

import os
import subprocess
import zipfile
import sys

os.environ['ZIP_ENCRYPT_PASS'] = 'test'
password = os.environ['ZIP_ENCRYPT_PASS']

# Step 1: Encrypt the file using AES256
rc = subprocess.call(['/usr/local/Cellar/p7zip/16.02_1/bin/7z', 'a', '-mem=AES256', password, '-y', 'myarchive.zip'] + 
                    ['/Users/joe/Projects/Sandbox/python-projects/test.txt', '/Users/joe/Projects/Sandbox/python-projects/some.txt'])

我在指定文件夹中有这 2 个文件，我想 7zip 并用密码对其进行加密！

当我运行这个程序时，我得到以下信息：

Joes-MacBook-Pro:python-projects joe$ python ./test.py

7-Zip [64] 16.02 : Copyright (c) 1999-2016 Igor Pavlov : 2016-05-21
p7zip Version 16.02 (locale=utf8,Utf16=on,HugeFiles=on,64 bits,8 CPUs x64)

Scanning the drive:

WARNING: No more files
myarchive.zip

2 files, 245 bytes (1 KiB)

Creating archive: test.7z

Items to compress: 2


Scan WARNINGS for files and folders:

myarchive.zip : No more files
----------------
Scan WARNINGS: 1


System ERROR:
E_INVALIDARG

为什么会失败？我这里有两个问题：

1. Python 中对 7zip 没有很好的支持
2. Mac 上对 7zip 没有很好的支持

但我认为我上面的代码应该可以工作，因为我可以通过在 Mac 上使用自制软件安装 7zip 来解决这两个问题。所以我做了：

brew install p7zip

然后我在子进程调用中给出了 7z 的路径。但这仍然失败！关于如何让它工作的任何想法？

编辑：我刚刚检查了参数可能是什么，这就是我得到的：

Joes-MacBook-Pro:bin joesan$ 7z --help

7-Zip [64] 16.02 : Copyright (c) 1999-2016 Igor Pavlov : 2016-05-21
p7zip Version 16.02 (locale=utf8,Utf16=on,HugeFiles=on,64 bits,8 CPUs x64)

Usage: 7z <command> [<switches>...] <archive_name> [<file_names>...]
       [<@listfiles...>]

<Commands>
  a : Add files to archive
  b : Benchmark
  d : Delete files from archive
  e : Extract files from archive (without using directory names)
  h : Calculate hash values for files
  i : Show information about supported formats
  l : List contents of archive
  rn : Rename files in archive
  t : Test integrity of archive
  u : Update files to archive
  x : eXtract files with full paths

<Switches>
  -- : Stop switches parsing
  -ai[r[-|0]]{@listfile|!wildcard} : Include archives
  -ax[r[-|0]]{@listfile|!wildcard} : eXclude archives
  -ao{a|s|t|u} : set Overwrite mode
  -an : disable archive_name field
  -bb[0-3] : set output log level
  -bd : disable progress indicator
  -bs{o|e|p}{0|1|2} : set output stream for output/error/progress line
  -bt : show execution time statistics
  -i[r[-|0]]{@listfile|!wildcard} : Include filenames
  -m{Parameters} : set compression Method
    -mmt[N] : set number of CPU threads
  -o{Directory} : set Output directory
  -p{Password} : set Password
  -r[-|0] : Recurse subdirectories
  -sa{a|e|s} : set Archive name mode
  -scc{UTF-8|WIN|DOS} : set charset for for console input/output
  -scs{UTF-8|UTF-16LE|UTF-16BE|WIN|DOS|{id}} : set charset for list files
  -scrc[CRC32|CRC64|SHA1|SHA256|*] : set hash function for x, e, h commands
  -sdel : delete files after compression
  -seml[.] : send archive by email
  -sfx[{name}] : Create SFX archive
  -si[{name}] : read data from stdin
  -slp : set Large Pages mode
  -slt : show technical information for l (List) command
  -snh : store hard links as links
  -snl : store symbolic links as links
  -sni : store NT security information
  -sns[-] : store NTFS alternate streams
  -so : write data to stdout
  -spd : disable wildcard matching for file names
  -spe : eliminate duplication of root folder for extract command
  -spf : use fully qualified file paths
  -ssc[-] : set sensitive case mode
  -ssw : compress shared files
  -stl : set archive timestamp from the most recently modified file
  -stm{HexMask} : set CPU thread affinity mask (hexadecimal number)
  -stx{Type} : exclude archive type
  -t{Type} : Set type of archive
  -u[-][p#][q#][r#][x#][y#][z#][!newArchiveName] : Update options
  -v{Size}[b|k|m|g] : Create volumes
  -w[{path}] : assign Work directory. Empty path means a temporary directory
  -x[r[-|0]]{@listfile|!wildcard} : eXclude filenames
  -y : assume Yes on all queries

我现在如何将它作为参数传递给 subprocess 以便我的 Python 代码正常工作？

Answer 1

您只需要使用正确的7z 参数，

$ tree
.
├── bar
└── foo

0 directories, 2 files
$ python
Python 2.7.13 (default, Sep 26 2018, 18:42:22) 
[GCC 6.3.0 20170516] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import subprocess
>>> zip_cmd = '7z a -mem=AES256 -pmy_password -tzip foo.zip foo bar'
>>> passwd = 'my_password'
>>> zip_cmd = ['/usr/bin/7z', 'a', '-mem=AES256', '-p{}'.format(passwd), '-tzip', 'foo.zip', 'foo', 'bar']
>>> zip_cmd
['/usr/bin/7z', 'a', '-mem=AES256', '-pmy_password', '-tzip', 'foo.zip', 'foo', 'bar']
>>> subprocess.call(zip_cmd)

7-Zip [64] 16.02 : Copyright (c) 1999-2016 Igor Pavlov : 2016-05-21
p7zip Version 16.02 (locale=en_IN.UTF-8,Utf16=on,HugeFiles=on,64 bits,4 CPUs Intel(R) Core(TM) i5-2520M CPU @ 2.50GHz (206A7),ASM,AES-NI)

Scanning the drive:
2 files, 27 bytes (1 KiB)

Creating archive: foo.zip

Items to compress: 2


Files read from disk: 2
Archive size: 385 bytes (1 KiB)
Everything is Ok
0
>>> import os
>>> os.listdir('.')
['bar', 'foo', 'foo.zip']
>>>
>>> os.mkdir('test')
>>> os.listdir('.')
['bar', 'test', 'foo', 'foo.zip']
>>> import shutil
>>> shutil.copy('foo.zip', 'test')
>>> os.chdir('test')
>>> os.listdir('.')
['foo.zip']
>>> os.getcwd()
'/home/telaverge/python/purge/test'
>>> unzip_cmd = ['/usr/bin/7z', 'x', 'foo.zip', '-p{}'.format(passwd)]
>>> unzip_cmd
['/usr/bin/7z', 'x', 'foo.zip', '-pmy_password']
>>> subprocess.call(unzip_cmd)

7-Zip [64] 16.02 : Copyright (c) 1999-2016 Igor Pavlov : 2016-05-21
p7zip Version 16.02 (locale=en_IN.UTF-8,Utf16=on,HugeFiles=on,64 bits,4 CPUs Intel(R) Core(TM) i5-2520M CPU @ 2.50GHz (206A7),ASM,AES-NI)

Scanning the drive for archives:
1 file, 385 bytes (1 KiB)

Extracting archive: foo.zip
--
Path = foo.zip
Type = zip
Physical Size = 385

Everything is Ok

Files: 2
Size:       27
Compressed: 385
0
>>> os.listdir('.')
['bar', 'foo', 'foo.zip']