Python dict to Javascipt JSON object with Jinja templating

routes.py

@app.route("/testing")
def test_json():
    some_dict = {
        's':"some_stringy",
        'bool':True,
        'lst':[1,2,3],
    }
    return render_template("some.html", python_dict=some_dict)

some.html

{% extends "layout.html" %}
{% block content %}   
...
  <script>
    const initialJson = {{python_dict|tojson}}; 
  </script>
...
{% endblock content %}