[Python] Return a dict object from Jinja2 macros

I have a separate file for helper macros, so I import one when needed. Here is problematic macro:

{% macro row_cycler(tiles) -%}
{%- set row1 = [] -%}
{%- set row2 = [] -%}
{%- set row3 = [] -%}
{%- set row4 = [] -%}
{%- set rows = cycler(row1, row2, row3, row4) -%}
{% for column in tiles|batch(4) -%}
{% for tile in column -%}
{%- do rows.next().append(tile) -%}
{%- endfor %}
{%- endfor %}
{{ dict(row1=row1, row2=row2, row3=row3, row4=row4) }}
{%- endmacro %}


Seems it returns dict, but it's not. It returns "markupsafe.Markup object", it leads to something that:

UndefinedError: 'markupsafe.Markup object' has no attribute 'itervalues'


and so on. How can I force Jinja to return dict without converting?

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