我如何在python中自动回答“是”？

Question

假设我有一个稍后运行apt upgrade -y的脚本，我需要手动回答不同包的这些问题。我怎么能自动这么做？

设置virtualbox-来宾-x11 (5.0.32-dfsg-0ubuntu1.16.04.2)

Configuration file '/etc/X11/Xsession.d/98vboxadd-xclient'
 ==> File on system created by you or by a script.
 ==> File also in package provided by package maintainer.
   What would you like to do about it ?  Your options are:
    Y or I  : install the package maintainer's version
    N or O  : keep your currently-installed version
      D     : show the differences between the versions
      Z     : start a shell to examine the situation
 The default action is to keep your current version.
*** 98vboxadd-xclient (Y/I/N/O/D/Z) [default=N] ?  conffile prompt detected: /etc/X11/Xsession.d/98vboxadd-xclient /etc/X11/Xsession.d/98vboxadd-xclient.dpkg-new

我的脚本能够检测到confile提示符，但是我应该如何自动地回答是呢？

通过使用python-apt api，我能够通过此函数检测提示。

def conffile(self, current, new):
    print " conffile prompt detected: %s %s" % (current, new)

    """(Abstract) Called when a conffile question from dpkg is detected."""

Answer 1

对于那些像我一样迷失的人，答案是：

import apt_pkg

apt_pkg.init_config()
apt_pkg.config.set("DPkg::Options::", "--force-confnew")

这将使apt自动接受新的配置文件。

Answer 2

使用yes命令：

yes Y | apt ...

Answer 3

由于(问题下的注释)您使用的是Python-APT，所以首先想到的方法是使用配置类来设置conf['APT::Get::Assume-Yes'] = True。