Jinja2 example for generating a local file using a template
Here I want to show you how to generate an HTML file (a local file) using a template with the Jinja2 template engine.
Python source (proba.py)
#!/usr/bin/env python
import os
from jinja2 import Environment, FileSystemLoader
PATH = os.path.dirname(os.path.abspath(__file__))
TEMPLATE_ENVIRONMENT = Environment(
autoescape=False,
loader=FileSystemLoader(os.path.join(PATH, 'templates')),
trim_blocks=False)
def render_template(template_filename, context):
return TEMPLATE_ENVIRONMENT.get_template(template_filename).render(context)
def create_index_html():
fname = "output.html"
urls = ['http://example.com/1', 'http://example.com/2', 'http://example.com/3']
context = {
'urls': urls
}
#
with open(fname, 'w') as f:
html = render_template('index.html', context)
f.write(html)
def main():
create_index_html()
########################################
if __name__ == "__main__":
main()
Jinja2 template (templates/index.html)
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>Proba</title>
</head>
<body>
<center>
<h1>Proba</h1>
<p>{{ urls|length }} links</p>
</center>
<ol align="left">
{% set counter = 0 -%}
{% for url in urls -%}
<li><a href="{{ url }}">{{ url }}</a></li>
{% set counter = counter + 1 -%}
{% endfor -%}
</ol>
</body>
</html>
Resulting output
If you execute proba.py, you will get this output:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>Proba</title>
</head>
<body>
<center>
<h1>Proba</h1>
<p>3 links</p>
</center>
<ol align="left">
<li><a href="http://example.com/1">http://example.com/1</a></li>
<li><a href="http://example.com/2">http://example.com/2</a></li>
<li><a href="http://example.com/3">http://example.com/3</a></li>
</ol>
</body>
</html>
You can find all these files here (GitHub link).
Leave a comment
Python Adventures 
This was really clear. I got this to work first go, thanks for providing the fast road to jinja