ipdb.sublime-snippet

<snippet>
    <content><![CDATA[
import ipdb; ipdb.set_trace()
]]></content>
    <!-- Optional: Set a tabTrigger to define how to trigger the snippet -->
    <!-- <tabTrigger>hello</tabTrigger> -->
    <!-- Optional: Set a scope to limit where the snippet will trigger -->
    <!-- <scope>source.python</scope> -->
    <tabTrigger>ipdb</tabTrigger>
    <scope>source.python</scope>
</snippet>

python.snippets

# vim-snipmate snippet
snippet rpdb
    import rpdb2; rpdb2.start_embedded_debugger("${1:password}", fAllowRemote=${2:True})    

rpdb.sublime-snippet

<snippet>
    <content><![CDATA[
import rpdb2; rpdb2.start_embedded_debugger("${1:password}", fAllowRemote=${2:True})
]]></content>
    <tabTrigger>rpdb</tabTrigger>
    <scope>source.python</scope>
</snippet>