flask how to use python built in function in html template (Jinja 2)

Question

Hi so I'm decrypting information so the value return is coming back as a byte. I'm trying to print it as a str so I can get rid of the b'' format. But I can't figure out how to do it in html template

{% for row in rows %}
{{ repr(password.decrypt(row['text']))[2:-1] }}

{% endfor %}

This is the code I tried, but I get repr not define. I'm trying to use python built in function repr in my html file

Answer 1

{% for row in rows %}
    {{ password.decrypt(row['text'])[2:-1]|string }}    
{% endfor %}

and pass the decrypt() function by retrun render_template("index.html", decrypt=decrypt) into your jinja template.

However, the jinja template will still go through your flask route to render as a real html before sending it to frontend. So I don't think there is difficulty in moving the function into py file.