Quickstart

.. teaser-begin

A Python module to simplify semantic versioning_.

.. teaser-end

The module follows the MAJOR.MINOR.PATCH style:

MAJOR version when you make incompatible API changes,
MINOR version when you add functionality in a backwards compatible manner, and
PATCH version when you make backwards compatible bug fixes.

Additional labels for pre-release and build metadata are supported.

To import this library, use:

.. code-block:: python

>>> import semver

Working with the library is quite straightforward. To turn a version string into the
different parts, use the semver.Version.parse function:

.. code-block:: python

>>> ver = semver.Version.parse('1.2.3-pre.2+build.4')
>>> ver.major
1
>>> ver.minor
2
>>> ver.patch
3
>>> ver.prerelease
'pre.2'
>>> ver.build
'build.4'

To raise parts of a version, there are a couple of functions available for
you. The function semver.Version.bump_major leaves the original object untouched, but
returns a new semver.Version instance with the raised major part:

.. code-block:: python

>>> ver = semver.Version.parse("3.4.5")
>>> ver.bump_major()
Version(major=4, minor=0, patch=0, prerelease=None, build=None)

It is allowed to concatenate different "bump functions":

.. code-block:: python

>>> ver.bump_major().bump_minor()
Version(major=4, minor=1, patch=0, prerelease=None, build=None)

To compare two versions, semver provides the semver.compare function.
The return value indicates the relationship between the first and second
version:

.. code-block:: python

>>> semver.compare("1.0.0", "2.0.0")
-1
>>> semver.compare("2.0.0", "1.0.0")
1
>>> semver.compare("2.0.0", "2.0.0")
0

There are other functions to discover. Read on!

.. |latest-version| image:: https://img.shields.io/pypi/v/semver.svg
:alt: Latest version on PyPI
:target: https://pypi.org/project/semver
.. |python-support| image:: https://img.shields.io/pypi/pyversions/semver.svg
:target: https://pypi.org/project/semver
:alt: Python versions
.. |downloads| image:: https://img.shields.io/pypi/dm/semver.svg
:alt: Monthly downloads from PyPI
:target: https://pypi.org/project/semver
.. |license| image:: https://img.shields.io/pypi/l/semver.svg
:alt: Software license
:target: https://github.com/python-semver/python-semver/blob/master/LICENSE.txt
.. |docs| image:: https://readthedocs.org/projects/python-semver/badge/?version=latest
:target: http://python-semver.readthedocs.io/en/latest/?badge=latest
:alt: Documentation Status
.. _semantic versioning: https://semver.org/
.. |black| image:: https://img.shields.io/badge/code%20style-black-000000.svg
:target: https://github.com/psf/black
:alt: Black Formatter
.. |Gitter| image:: https://badges.gitter.im/python-semver/community.svg
:target: https://gitter.im/python-semver/community
:alt: Gitter
.. |openissues| image:: http://isitmaintained.com/badge/open/python-semver/python-semver.svg
:target: http://isitmaintained.com/project/python-semver/python-semver
:alt: Percentage of open issues
.. |GHAction| image:: https://github.com/python-semver/python-semver/workflows/Python/badge.svg
:alt: Python
.. |GHDiscussion| image:: https://shields.io/badge/GitHub-%20Discussions-green?logo=github
:target: https://github.com/python-semver/python-semver/discussions
:alt: GitHub Discussion

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