<s> """<STR_LIT>""" <EOL> from django import template <EOL> register = template . Library ( ) <EOL> @ register . filter <EOL> def istrue ( value ) : <EOL> return value is True <EOL> @ register . filter <EOL> def isfalse ( value ) : <EOL> return value is False <EOL> @ register . filter <EOL> def isnone ( value ) : <EOL> return value is None </s>
