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Adding a new module
===================
Each module needs an `__init__.py` file and a `tests` folder that also
contains an `__init__.py` file. For a module, a simple one may look
like this::
r"""
A module (:mod:`skbio.module`)
==============================
.. currentmodule:: skbio.module
Documentation for this module.
"""
# ----------------------------------------------------------------------------
# Copyright (c) 2013--, scikit-bio development team.
#
# Distributed under the terms of the Modified BSD License.
#
# The full license is in the file LICENSE.txt, distributed with this software.
# ----------------------------------------------------------------------------
from skbio.util import TestRunner
test = TestRunner(__file__).test
Usually, some functionality from the module will be made accessible by
importing it in `__init__.py`. It's convenient to use explicit
relative imports (`from .implementation import compute`), so that
functionality can be neatly separated in different files but the user
doesn't face a deeply nested package: `from skbio.module import
compute` instead of `from skbio.module.implementation import compute`.
Inside the tests folder, a simpler `__init__.py` works fine (it is
necessary so that all tests can be run after installation)::
# ----------------------------------------------------------------------------
# Copyright (c) 2013--, scikit-bio development team.
#
# Distributed under the terms of the Modified BSD License.
#
# The full license is in the file LICENSE.txt, distributed with this software.
# ----------------------------------------------------------------------------
Finally, remember to also follow the :doc:`doc_guide`.
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