pythonfinder

PythonFinder: Cross Platform Search Tool for Finding Pythons

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.. image:: https://readthedocs.org/projects/pythonfinder/badge/?version=master :target: http://pythonfinder.readthedocs.io/en/master/?badge=master :alt: Documentation Status

Installation

Install from PyPI_:

.. code-block:: console

$ pipenv install pythonfinder

Install from Github_:

.. code-block:: console

$ pipenv install -e git+https://github.com/sarugaku/pythonfinder.git#egg=pythonfinder

.. _PyPI: https://www.pypi.org/project/pythonfinder .. _Github: https://github.com/sarugaku/pythonfinder

.. _Usage:

Usage

Using PythonFinder is easy. Simply import it and ask for a python:

.. code-block:: pycon

>>> from pythonfinder import Finder
>>> f = Finder()
>>> f.find_python_version(3, minor=6)
PathEntry(path=PosixPath('/home/hawk/.pyenv/versions/3.6.5/bin/python'), _children={}, is_root=False, only_python=False, py_version=PythonVersion(major=3, minor=6, patch=5, is_prerelease=False, is_postrelease=False, is_devrelease=False, version=<Version('3.6.5')>, architecture='64bit', comes_from=PathEntry(path=PosixPath('/home/hawk/.pyenv/versions/3.6.5/bin/python'), _children={}, is_root=True, only_python=False, py_version=None, pythons=None), executable=None), pythons=None)
>>> f.find_python_version(2)
PathEntry(path=PosixPath('/home/hawk/.pyenv/shims/python2'), ...py_version=PythonVersion(major=2, minor=7, patch=15, is_prerelease=False, is_postrelease=False, is_devrelease=False, version=<Version('2.7.15')>, architecture='64bit', comes_from=PathEntry(path=PosixPath('/home/hawk/.pyenv/shims/python2'), _children={}, is_root=True, only_python=False, py_version=None, pythons=None), executable=None), pythons=None)
>>> f.find_python_version("anaconda3-5.3.0")

Find a named distribution, such as anaconda3-5.3.0:

.. code-block:: pycon

PathEntry(path=PosixPath('/home/hawk/.pyenv/versions/anaconda3-5.3.0/bin/python3.7m'), _children={'/home/hawk/.pyenv/versions/anaconda3-5.3.0/bin/python3.7m': ...}, only_python=False, name='anaconda3-5.3.0', _py_version=PythonVersion(major=3, minor=7, patch=0, is_prerelease=False, is_postrelease=False, is_devrelease=False,...))

PythonFinder can even find beta releases:

.. code-block:: pycon

>>> f.find_python_version(3, minor=7)
PathEntry(path=PosixPath('/home/hawk/.pyenv/versions/3.7.0b1/bin/python'), _children={}, is_root=False, only_python=False, py_version=PythonVersion(major=3, minor=7, patch=0, is_prerelease=True, is_postrelease=False, is_devrelease=False, version=<Version('3.7.0b1')>, architecture='64bit', comes_from=PathEntry(path=PosixPath('/home/hawk/.pyenv/versions/3.7.0b1/bin/python'), _children={}, is_root=True, only_python=False, py_version=None, pythons=None), executable=None), pythons=None)

>>> f.which('python')
PathEntry(path=PosixPath('/home/hawk/.pyenv/versions/3.6.5/bin/python'), _children={}, is_root=False, only_python=False, py_version=PythonVersion(major=3, minor=6, patch=5, is_prerelease=False, is_postrelease=False, is_devrelease=False, version=<Version('3.6.5')>, architecture='64bit', comes_from=PathEntry(path=PosixPath('/home/hawk/.pyenv/versions/3.6.5/bin/python'), _children={}, is_root=True, only_python=False, py_version=None, pythons=None), executable=None), pythons=None)

Windows Support

PythonFinder natively supports windows via both the PATH environment variable and PEP-514 <https://www.python.org/dev/peps/pep-0514/>_ compliant finder which comes by default with python 3. Usage on windows becomes:

.. code-block:: pycon

>>> from pythonfinder import Finder
>>> f = Finder()
>>> f.find_python_version(3, minor=6)
PythonVersion(major=3, minor=6, patch=4, is_prerelease=False, is_postrelease=False, is_devrelease=False, version=<Version('3.6.4')>, architecture='64bit', comes_from=PathEntry(path=WindowsPath('C:/Program Files/Python36/python.exe'), _children={}, is_root=False, only_python=True, py_version=None, pythons=None), executable=WindowsPath('C:/Program Files/Python36/python.exe'))

>>> f.find_python_version(3, minor=7, pre=True)
PythonVersion(major=3, minor=7, patch=0, is_prerelease=True, is_postrelease=False, is_devrelease=False, version=<Version('3.7.0b5')>, architecture='64bit', comes_from=PathEntry(path=WindowsPath('C:/Program Files/Python37/python.exe'), _children={}, is_root=False, only_python=True, py_version=None, pythons=None), executable=WindowsPath('C:/Program Files/Python37/python.exe'))

>>> f.which('python')
PathEntry(path=WindowsPath('C:/Python27/python.exe'), _children={}, is_root=False, only_python=False, py_version=None, pythons=None)

Finding Executables ///////////////////

PythonFinder also provides which functionality across platforms, and it uses lazy loading and fast-returns to be performant at this task.

.. code-block:: pycon

>>> f.which('cmd')
PathEntry(path=WindowsPath('C:/windows/system32/cmd.exe'), _children={}, is_root=False, only_python=False, py_version=None, pythons=None)

>>> f.which('code')
PathEntry(path=WindowsPath('C:/Program Files/Microsoft VS Code/bin/code'), _children={}, is_root=False, only_python=False, py_version=None, pythons=None)

 >>> f.which('vim')
PathEntry(path=PosixPath('/usr/bin/vim'), _children={}, is_root=False, only_python=False, py_version=None, pythons=None)

>>> f.which('inv')
PathEntry(path=PosixPath('/home/hawk/.pyenv/versions/3.6.5/bin/inv'), _children={}, is_root=False, only_python=False, py_version=None, pythons=None)

Architecture support ////////////////////

PythonFinder supports architecture specific lookups on all platforms:

.. code-block:: pycon

>>> f.find_python_version(3, minor=6, arch="64")
PathEntry(path=PosixPath('/usr/bin/python3'), _children={'/usr/bin/python3': ...}, only_python=False, name='python3', _py_version=PythonVersion(major=3, minor=6, patch=7, is_prerelease=False, is_postrelease=False, is_devrelease=False, is_debug=False, version=<Version('3.6.7')>, architecture='64bit', comes_from=..., executable='/usr/bin/python3', name='python3'), _pythons=defaultdict(None, {}), is_root=False)

Integrations

• Pyenv <https://github.com/pyenv/pyenv>_
• ASDF <https://github.com/asdf-vm/asdf>_
• PEP-514 <https://www.python.org/dev/peps/pep-0514/>_
• Virtualenv <https://github.com/pypa/virtualenv>_
• Pipenv <https://pipenv.org>_