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ZBdS)/a� Facilities for reading and writing Debian changelogs

The aim of this module is to provide programmatic access to Debian changelogs
to query and manipulate them. The format for the changelog is defined in
`deb-changelog(5)
<https://manpages.debian.org/stretch/dpkg-dev/deb-changelog.5.html>`_

Stability: The API is not marked as stable but hasn't changed incompatibly
since 2007. Potential users of these classes are asked to work with the
`python-debian` maintainers to improve, extend and stabilise this API.

Overview
========

Create a changelog object using the constuctor. Pass it the contents of the
file if there are some entries, or ``None`` to create an empty changelog::

    >>> import debian.changelog
    >>> ch = debian.changelog.Changelog()
    >>> ch.new_block(
    ...     package='example',
    ...     version='0.1',
    ...     distributions='unstable',
    ...     urgency='low',
    ...     author="%s <%s>" % debian.changelog.get_maintainer(),
    ...     date=debian.changelog.format_date()
    ... )
    >>> ch.add_change('')
    >>> print(ch)
    example (0.1) unstable; urgency=low

    -- Stuart Prescott <stuart@debian.org>  Sun, 08 Apr 2018 13:03:01 +1000


If you have the full contents of a changelog, but are only interested in the
most recent versions you can pass the ``max_blocks`` keyword parameter to the
constuctor to limit the number of blocks of the changelog that will be parsed.
If you are only interested in the most recent version of the package then pass
``max_blocks=1``::

    >>> import gzip
    >>> from debian.changelog import Changelog
    >>> with gzip.open('/usr/share/doc/dpkg/changelog.Debian.gz') as fh:
    ...     ch = Changelog(fh, max_blocks=1)
    >>> print('''
    ...     Package: %s
    ...     Version: %s
    ...     Urgency: %s''' % (ch.package, ch.version, ch.urgency))
        Package: dpkg
        Version: 1.18.24
        Urgency: medium


See `/usr/share/doc/python-debian/examples/changelog/` or the
`git repository
<https://salsa.debian.org/python-debian-team/python-debian/tree/master/
examples/changelog>`_
for examples of usage.


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