python apt-get列表升级 [英] python apt-get list upgrades

问题描述

如何获取可用的升级软件包列表，并使用python将其写入文件?

How can I get a list of upgrade packages available and write it to file using python?

当我运行apt-get upgrade > output 它在bash中工作.我想我必须在python程序中发送陷阱信号( Ctrl + C ).

When I run apt-get upgrade > output it works in bash. I think I have to send the trap signal (Ctrl+C) in the python program.

关于如何实现这一目标的任何建议?

Any suggestions on how to achieve this?

我现在在代码上尝试过:

I tried this on the code now:

#!/usr/bin/env python
import subprocess

apt = subprocess.Popen([r"apt-get", "-V", "upgrade", ">", "/usr/src/python/upgrade.log"], stdin=subprocess.PIPE)
apt_stdin = apt.communicate()[0]

但它会退出并且不会写入文件.

but it exits and does not write to the file.

这可行，但是将其移植到其他Debian系统时出现错误:

This works but I am getting error when I port this to other Debian systems:

import apt

cache=apt.Cache()
cache.update()
cache.open(None)
cache.upgrade()
for pkg in cache.get_changes():
#       print pkg.name,  pkg.summary
        fileHandle = open('/tmp/upgrade.log', 'a')
        fileHandle.write(pkg.name + " - " + pkg.summary + "\n")

和错误....

/usr/lib/python2.5/site-packages/apt/__init__.py:18: FutureWarning: apt API not stable yet
  warnings.warn("apt API not stable yet", FutureWarning)
Traceback (most recent call last):
  File "apt-notify.py", line 13, in <module>
    for pkg in cache.get_changes():
AttributeError: 'Cache' object has no attribute 'get_changes'

推荐答案

为什么不使用python-apt模块例如

Why not use the python-apt module eg.

import apt
cache=apt.Cache()
cache.update()
cache.open(None)
cache.upgrade()
for pkg in cache.getChanges():
    print pkg.sourcePackageName, pkg.isUpgradeable

还阅读了badp评论中的链接

also read the link in badp's comment

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