<computeroutput>$ </computeroutput><userinput>aptitude why python3-debian
</userinput><computeroutput>i   aptitude         Suggests apt-xapian-index
p   apt-xapian-index Depends  python3-debian (&gt;= 0.1.14)
</computeroutput>
<computeroutput>$ </computeroutput><userinput>aptitude why python-debian
</userinput><computeroutput>i   aptitude         Recommends apt-xapian-index         
i A apt-xapian-index Depends    python-debian (&gt;= 0.1.15)
</computeroutput>