Install from PyPI:
$ pipenv install pythonfinderInstall from Github:
$ pipenv install -e git+https://github.com/sarugaku/pythonfinder.git#egg=pythonfinderUsing PythonFinder is easy. Simply import it and ask for a python:
>>> 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:
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:
>>> 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)
PythonFinder natively supports windows via both the PATH environment variable and PEP-514 compliant finder which comes by default with python 3. Usage on windows becomes:
>>> 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)
PythonFinder also provides which functionality across platforms, and it uses lazy loading and fast-returns to be performant at this task.
>>> 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)
PythonFinder supports architecture specific lookups on all platforms:
>>> 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)