Execute Django command within Django variable

Question

I would like to read a string from an excel-file with both HTML- and Django-Tags (e.g. "Your current < b > account balance </ b > is: {{ current_balance }}"). I then pass the variable from the python-file to the Django-template (name e.g. balance). When I try to call the variable in the Django-template using {{ balance }}, I get the displayed the whole variable as a string. If I use {{ balance | safe }} the HTML-tags are executed. Is there a way such that the Django tags get executed as well?

Here's my code:

In pages.py:

class page(Page):
    
    def vars_for_template(self): #define variables to pass to tempalte
        
        loc = ("file.xlsx")

        # To open Workbook
        wb = xlrd.open_workbook(loc)
        sheet = wb.sheet_by_index(0)

        # For row 0 and column 0
        variable = sheet.cell_value(0, 1))


        print(title)
        return dict(
            variable=variable
        )

In page.html:

{% extends "global/Page.html" %}
{% load staticfiles otree %}

{% block title %}

{% endblock %}

{% block content %}
   {{ variable | safe }}
{% endblock %}

the value of variable is the current value is <b>{{ Constants.value }}</b> In the output, only the HTML-tags get executed an I receive "the current value is {{ Constants.value }}". Is it possible to display the actual value of the variable Constants.value?