Python显示所有已安装的包

Question

有没有办法让python显示服务器上安装的所有apt/yum包？我有一个程序,只能抓取我指定的一个包,但我想知道是否在python中有一个apt-show-versions/yum check-update模块,因为python-yum和python-apt只做单个包.

谢谢.

编辑:

这是我目前的代码:

# For finding the package version and using the package name -i
def aptpkg(package_name):
    cache = apt.Cache()
    pkg = cache[package_name]
    host = subprocess.Popen('hostname', stdout=subprocess.PIPE, universal_newlines=True).stdout.read().strip()
    if pkg.is_installed:
        print host
        print 'Current ' + package_name + ' installed:', pkg.installed.version
        con.execute("insert into ansible_packagelist(date, host, package_name, installed_version) values (current_timestamp,%s,%s,%s)", (host, package_name, pkg.installed.version,))
    else:
        print host, package_name + ' is not installed on this system.\n'
    if pkg.is_upgradable:
        print 'Upgradeable version of ' + package_name + ' :', pkg.candidate.version
        con.execute("update ansible_packagelist set upgradeable_version = %s where package_name = %s", (pkg.candidate.version, package_name))
    db.commit()

Answer 1

这是pythonic方式:

import apt
cache = apt.Cache()

for mypkg in apt.Cache():
    if cache[mypkg.name].is_installed:
        print mypkg.name

对于yum,我首先需要登录RH/Centos系统.但你可以看一下yum库,你会找到像'rpmdb.searchNevra'这样的东西.