ChatGPT told me that:

In Jinja2, if an expression is enclosed in quotes (single or double), it is treated as a literal string, and the entire content, including the expression, will be output as-is. Jinja2 does not parse or evaluate expressions within quoted strings.

However I tested the following template:

{% set name = "Jason" -%}
Name: "{{ name }}"

The output is

Name: "Jason"

While according to ChatGPT it should be:

Name: {{ name }}

So is ChatGPT wrong? What is the behavior of double/single quote in jinja2?

ChatGPT told me that:

In Jinja2, if an expression is enclosed in quotes (single or double), it is treated as a literal string, and the entire content, including the expression, will be output as-is. Jinja2 does not parse or evaluate expressions within quoted strings.

However I tested the following template:

{% set name = "Jason" -%}
Name: "{{ name }}"

The output is

Name: "Jason"

While according to ChatGPT it should be:

Name: {{ name }}

So is ChatGPT wrong? What is the behavior of double/single quote in jinja2?

• jinja2

2 Answers 2

So is ChatGPT wrong?

No.

When you write:

Name: "{{ name }}"

The quotes are not part of the Jinja template expression. They are literal text in your document. Jinja only evaluates expressions within {{...}} markers. If you had written this:

Name: {{ "name" }}

Jinja would interpret "name" as a literal string and the output would be:

Name: name

And if you had written:

Name: "{{ "name" }}"

The output would be:

Name: "name"

ChatGPT is partially correct. It only happens within Jinja tags, not the whole source of a Jinja2 template. When using quotes in HTML, Jinja doesn't replace them outside of tags.

If you do want to escape Jinja templating, you have other ways to do it:

1. Output a string with the code:

   {{ "{{ name }}" }}
   

2. Use HTML entities:

   {{ name }}
   

3. Use the Jinja {% raw %} tag:

   {% raw %}
       {{ name }}
   {% endraw %}
   

   (should you want to print {{ endraw }}, use another escaping method)