Escaping jinja2

#help #jinja2

Hello Experts,
I want to escape '\' in jinja template am using in terraform, I tried multiple ways but somehow it's not happening!
Below is the code snippet :

{%- if mrecords['type'] == "TXT" %}
                        {%- if mrecords['values'] is defined -%}
                            {%- set txtrecord_set = namespace(value=[]) -%}
                            {%- for txtrecord in mrecords['values'] -%}
{%- set txt_value = '"' ~ '\' ~ '"' ~ txtrecord ~ '\' ~ '"' ~ '"'  -%}                              
                                {%- set txtrecord_set.value = txtrecord_set.value | append(txt_value) -%}
                            {%- endfor -%}

Error:

Unable to parse statement "if": Unable to parse statement "for": Unable to parse statement "set": Malformed 'set'-tag args. (Line: 63 Col: 66, near "' ~ txtrecord ~ '' ~ '")