asterisk pillar

gistfile1.txt

asterisk:
  sip:
    users:
      '00_tpl_grandstream-phone':
        opts:
          type: "friend"
          context: "from-local"
          host: "dynamic"
          nat: "no"
          dtmfmode: "rfc2833"
          disallow: "all"
          allow: "g722,alaw,ulaw"
        parent:
          "!"
        dids: []
        localexts: []
      '800':
        opts:
          secret: xxxx
          call-limit: 1
        parent:
          00_tpl_grandstream-phone
      "802":
        opts:
          secret: xxxx
        parent:
          00_tpl_grandstream-phone

I'm at a loss how to use this...

My template looks like this:

{% set sip_config = pillar.get('asterisk', {})['sip'] %}
{%- if 'users' in sip_config.keys() %}
{% for user, args in sip_config['users'].items() -%}
{%- if 'localexts' in args.keys() -%}
{%- set exts = args['localexts'] -%}
{%- else -%}
{%- set exts = [ user ] -%}
{%- endif -%}
{%- for ext in exts %}
exten => {{ ext }},1,Dial(SIP/{{ user }}/{{ ext }},,wWxXtT)
{%- endfor %}
{% endfor %}
{% endif %}

supposedly it should work better with:
sip_config = salt[pillar.get]('asterisk:sip', {}).items()
or
sip_config = pillar.get('asterisk', {'sip':{}})['sip']

The first one doesn't work, it seems I get a different object and other stuff in the template fails. Is there a good doc accessing data in pillars (when one needs .items() etc.) other than http://docs.saltstack.com/en/latest/topics/tutorials/pillar.html? What is the difference between salt'pillar.get' and pillar.get() ?

How about this? Is there a way to simplify:

{%- for user, args in salt['pillar.get']('asterisk:sip:users') | dictsort %}
[{{ user }}]({{ args['parent'] }})
  {%- if 'disallow' in args['opts'].keys() %}
        disallow={{ args['opts']['disallow'] }}
        allow={{ args['opts']['allow'] }}
    {%- do args['opts'].pop('allow', None) -%}
    {%- do args['opts'].pop('disallow', None) -%}
  {%- endif %}
  {%- for opt, optval in args['opts'].items() %}
        {{ opt }}={{ optval }}
  {%- endfor %}
{% endfor %}