Jinja2 inline comments

How can I put comments inside Jinja2 argument list declaration ?

Everything I have tried gives an error:jinja2.exceptions.TemplateSyntaxError: unexpected char u'#'

{{ Switch('var',    [('1', 'foo'),    #  comment 1     ('2', 'bar'),    ## comment 2     ('3', 'rum'),    {# comment 3 #}     ]) }}{% macro Switch(var, caselist) %}    {% for case, action in caselist%}        CMP  {{var}} {{case}}         JNE  {{LABEL}}        {{action}}        JMP  {{LABELF}}{{LABEL}}:  NOP    {%- endfor %}{{LABELF}}: NOP{%- endmacro -%}

In my case Jinja2 is used as macro preprocessor for assembler.