Utilities for interacting with PyPI
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Twine is a utility for interacting with PyPI.

Currently it only supports uploading distributions.

Why Should I Use This?

The biggest reason to use twine is that it securely authenticates you to PyPI over HTTPS using a verified connection while python setup.py upload only recently stopped using HTTP in Python 2.7.9+ and Python 3.2+. This means anytime you use python setup.py upload with an older Python version, you expose your username and password to being easily sniffed. Twine uses only verified TLS to upload to PyPI protecting your credentials from theft.

Secondly it allows you to precreate your distribution files. python setup.py upload only allows you to upload something that you've created in the same command invocation. This means that you cannot test the exact file you're going to upload to PyPI to ensure that it works before uploading it.

Finally it allows you to pre-sign your files and pass the .asc files into the command line invocation (twine upload twine-1.0.1.tar.gz twine-1.0.1.tar.gz.asc). This enables you to be assured that you're typing your gpg passphrase into gpg itself and not anything else since you will be the one directly executing gpg --detach-sign -a <filename>.


  • Verified HTTPS Connections
  • Uploading doesn't require executing setup.py
  • Uploading files that have already been created, allowing testing of distributions before release
  • Supports uploading any packaging format (including wheels).


$ pip install twine


  1. Create some distributions in the normal way:
$ python setup.py sdist bdist_wheel
  1. Upload with twine:
$ twine upload dist/*
  1. Done!


$ twine upload -h
usage: twine upload [-h] [-r REPOSITORY] [-s] [-i IDENTITY] [-u USERNAME]
                    [-p PASSWORD] [-c COMMENT]
                    dist [dist ...]

positional arguments:
  dist                  The distribution files to upload to the repository,
                        may additionally contain a .asc file to include an
                        existing signature with the file upload

optional arguments:
  -h, --help            show this help message and exit
  -r REPOSITORY, --repository REPOSITORY
                        The repository to upload the files to
  -s, --sign            Sign files to upload using gpg
  -i IDENTITY, --identity IDENTITY
                        GPG identity used to sign files
  -u USERNAME, --username USERNAME
                        The username to authenticate to the repository as
  -p PASSWORD, --password PASSWORD
                        The password to authenticate to the repository with
  -c COMMENT, --comment COMMENT
                        The comment to include with the distribution file
  --config-file FILE
                        The .pypirc config file to use



  1. Fork the repository on GitHub.
  2. Make a branch off of master and commit your changes to it.
  3. Run the tests with tox
    • Either use tox to build against all supported Python versions (if you have them installed) or use tox -e py{version} to test against a specific version, e.g., tox -e py27 or tox -e py34.
    • Always run tox -e pep8
  4. Ensure that your name is added to the end of the AUTHORS file using the format Name <email@domain.com> (url), where the (url) portion is optional.
  5. Submit a Pull Request to the master branch on GitHub.

If you'd like to have a development environment for twine, you should create a virtualenv and then do pip install -e . from within the directory.