Jinja2 Type Testing (useful for constrained environments)

Jinja2 Type Testing.txt

None:
  - none
True:
  - boolean
False:
  - boolean
65535:
  - number
  - integer
123:
  - number
  - integer
123.0:
  - number
  - float
inf:
  - number
  - float
-inf:
  - number
  - float
hamburger:
  - string
{'food': 'mochi', 'flavor': 'matcha'}:
  - dict
[1, 'tacos', 3, 'ice cream']:
  - list
(1, 'tacos', 3, 'ice cream'):
  - tuple

Jinja2 Type Testing.txt.j2

{%
set test_values = [
  none,
  true,
  false,
  0xFFFF,
  123,
  123.0,
  float("inf"),
  -float("inf"),
  "hamburger",
  {"food": "mochi", "flavor": "matcha"},
  [1, "tacos", 3, "ice cream"],
  (1, "tacos", 3, "ice cream"),
]
%}

{% for t in test_values %}
  {%- set v = namespace(types=[]) -%}
  {%- if t is none -%}
    {%- set v.types = v.types + ['none'] -%}
  {%- endif -%}
  {%- if t is boolean -%}
    {%- set v.types = v.types + ['boolean'] -%}
  {%- endif -%}
  {%- if t is number and t is not boolean -%}
    {%- set v.types = v.types + ['number'] -%}
  {%- endif -%}
  {%- if t is integer -%}
    {%- set v.types = v.types + ['integer'] -%}
  {%- endif -%}
  {%- if t is float -%}
    {%- set v.types = v.types + ['float'] -%}
  {%- endif -%}
  {%- if t is string -%}
    {%- set v.types = v.types + ['string'] -%}
  {%- endif -%}
  {%- if t is mapping -%}
    {%- set v.types = v.types + ['dict'] -%}
  {%- endif -%}
  {%- if t is sequence and t is not mapping and t is not string and t.pop is undefined -%}
    {%- set v.types = v.types + ['tuple'] -%}
  {%- endif -%}
  {%- if t is sequence and t is not mapping and t is not string and t.pop is not undefined -%}
    {%- set v.types = v.types + ['list'] -%}
  {%- endif -%}
  {{ t ~ ":\n  - " ~ (v.types | join("\n  - ")) }}
{% endfor %}