getting json dictionary values, though python and jinja

You should better decode JSON to python dictionary in view function and pass it into jinja:

import json@app.route("/something")def something():    with open('myfile.json', 'r') as f:        json_data = json.loads(f.read())    return render_template("something.html", json_data=json_data)

something.html:

<dl>{% for key, value in json_data.iteritems() %}    <dt>{{ key|e }}</dt>    <dd>{{ value|e }}</dd>{% endfor %}</dl>

If your goal is to print a pretty json string then it might be better to prepare the actual string before passing it to jinja.

In the view you can do this:

import json@app.route("/something")def something():    with open('myfile.json', 'r') as f:        json_data = json.loads(f.read())        formatted_json = json.dumps(            json_data,            sort_keys=True,            indent=4,            separators=(',', ': '))    return render_template("something.html", json=formatted_json)

And in your something.html you simply print that already formatted variable:

{{ json }}

You can read more about the json string formatting in the documentation section about "pretty printing"