How to do partial function application in Jinja / dbt

jinja_partial_func.sql

{# Modelled after Python's functools.partial #}
{% macro make_partial(func) %}
    {% set partial = dict(func=func, args=varargs, keywords=kwargs) %}
    {% do return(partial) %}
{% endmacro %}

{% macro is_partial(partial) %}
    {% do return(partial is mapping 
              and partial.func
              and partial.args
              and partial.keywords) %}
{%- endmacro %}

{% macro call_partial(partial) %}
    {%- set all_varargs = partial.args + varargs -%}
    {%- set all_kwargs = dict(partial.keywords, **kwargs) -%}
    {% do return(partial.func(*all_varargs, **all_kwargs)) %}
{%- endmacro %}

{# Prints varargs then kwargs, for testing partial #}
{% macro print_args() %}
    {%- for v in varargs -%}
        {{ v }}{% if not loop.last or kwargs %},{% endif %}
    {%- endfor -%}
    {%- for k, v in kwargs.items() -%}
        {{ k }}={{ v }}{% if not loop.last %},{% endif %}
    {%- endfor -%}
{% endmacro %}


{# Example, within a dbt model: #}

{% set print_poem = make_partial(print_args, 1, buckle=None) %}
{# print_poem = print_args(1, ..., buckle=None, ...) #}

select '{{ call_partial(print_poem, 2, buckle="my shoe") }}'
{# print_poem(2, buckle="my shoe") => print_args(1, 2, buckle="my shoe") #}
{# Ouputs: select '1,2,buckle=my shoe' #}