Skip to main content

A Jinja2 template loader for AWS S3.

Project description

Project Status: Beta. It’s pretty simple and works for me, but not heavily tested in production use. Caveat Emptor.


This library relies on the boto3 library for S3 access, so you will need to configure your AWS credentials first. Then, provide your S3 bucket name and optional template directory name when instantiating the loader:

from jinja2 import Environment
from jinja2_s3loader import S3loader

s3template_dir = "test/templates"  # trailing slash not required, but ok
j2 = Environment(loader=S3loader('my-s3-bucket-name', s3template_dir))
t = j2.get_template('mytemplate.j2')  # loads test/templates/mytemplate.j2

Note that, although S3 does not have real directories and treats the prefix string as purely a sub-string, this S3loader will treat the prefix as a subdirectory. That is, it will add a trailing slash if none is provided.

Remember, accessing files over S3 costs money. The loader currently does not support live reloading. I built this to support accessing S3 templates from AWS Lambda functions, so those constraints are fine with me, but your use case may be different.

Contributions welcome. File a Github issue to report a bug.

Known Issues

  • The loader blindly attempts to decode all templates as UTF-8. If your template is encoded with an incompatible encoding, it WILL be broken. PR’s welcome.


Copyright 2015 Vince Veselosky and contributors.

Licensed under the Apache License, Version 2.0 (the “License”); you may not use this file except in compliance with the License. You may obtain a copy of the License at

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an “AS IS” BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Project details

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distribution

jinja2_s3loader-0.3.0.tar.gz (7.8 kB view hashes)

Uploaded source

Built Distribution

jinja2_s3loader-0.3.0-py2.py3-none-any.whl (6.4 kB view hashes)

Uploaded py2 py3

Supported by

AWS AWS Cloud computing Datadog Datadog Monitoring Facebook / Instagram Facebook / Instagram PSF Sponsor Fastly Fastly CDN Google Google Object Storage and Download Analytics Huawei Huawei PSF Sponsor Microsoft Microsoft PSF Sponsor NVIDIA NVIDIA PSF Sponsor Pingdom Pingdom Monitoring Salesforce Salesforce PSF Sponsor Sentry Sentry Error logging StatusPage StatusPage Status page