Python Flask Render Text from Variable like render_template

Question

I know the flask function render_template. I have to give the file name of the template. But now I want to render the string of a template (that is the content of the template). That makes sense. but I don't want to explain now why. How can I render the text of a template simply?

But if i do that (i have flask-bootstrap extension installed) it will give me these things: {% extends "bootstrap/base.html" %} etc. as plain text and not handled. — Faminator, Oct 28 '15 at 21:51
Is that not your question? _How can I render the text of a template simply?_ — OneCricketeer, Oct 28 '15 at 21:53

score 56 · Accepted Answer · edited Oct 18 '18 at 12:25

56

You can use render_template_string:

>>> from flask import render_template_string
>>> render_template_string('hello {{ what }}', what='world')
'hello world'

edited Oct 18 '18 at 12:25

mskfisher

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answered Oct 28 '15 at 23:08

ThiefMaster

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this answer gives an error: AttributeError: 'NoneType' object has no attribute 'app' – Sharvari Gc Oct 20 '20 at 07:26
@SharvariGc in that case you need to use it inside a context: `with app.app_context(): ...`. See here: https://stackoverflow.com/a/50927259/11750716 – Jean Monet Jun 13 '21 at 22:06

r-m-n · Answer 2 · 2015-10-28T22:48:40.700

3

you can use from_string

template = "text {{ hello }}"
print app.jinja_env.from_string(template).render(hello='Hello')

>> text Hello

edited Oct 28 '15 at 22:48

answered Oct 28 '15 at 22:10

r-m-n

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Since he's using Flask he can just use `render_template_string` (imported from Flask) – ThiefMaster Oct 28 '15 at 23:07
I can't tick both answers as right. Your answer is good too ;) – Faminator Oct 29 '15 at 08:18

duan · Answer 3 · 2018-05-18T11:24:43.117

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Actually you can call jinja2 render function directly:

jinja2.Template("I am {{ var }}").render(**kargs)

When not working with flask, this is useful

edited May 18 '18 at 11:24

answered May 08 '17 at 05:55

duan

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This seems to be the simplest way without requiring Flask – Sean Pianka Mar 29 '19 at 19:34

score 0 · Answer 4 · edited May 23 '17 at 12:02

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Taken from What's the easiest way to escape HTML in Python.

import cgi
rendered = render_template('template.html')
return cgi.escape(rendered)

edited May 23 '17 at 12:02

Community

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answered Oct 28 '15 at 22:33

OneCricketeer

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What has HTML escaping to do with this question? – ThiefMaster Oct 28 '15 at 23:06
This returns the rendered HTML file template as a string. The other answers just do simple template strings. @ThiefMaster – OneCricketeer Oct 29 '15 at 00:54

Python Flask Render Text from Variable like render_template

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