lightgbm 2.0.3

LightGBM Python Package

Installation

Preparation

setuptools is needed.

For Mac OS X users, gcc with OpenMP support must be installed first. Refer to wiki for installing gcc with OpenMP support.

Note: 32-bit python is not supported. Please install 64-bit version.

Install from pip

Install wheel via pip install wheel first. For windows user, VC runtime is needed if Visual Studio(2015 or 2017) is not installed.

Install from wheel package:

pip install lightgbm

Install from source package:

pip install --no-binary :all: lightgbm

Note: Installation from source package require installing cmake first, and Visual Studio (or MS Build) is needed in Windows.

For the MinGW build in Windows or GPU support, please install the latest version from GitHub.

Install from GitHub

Installation from GitHub require installing cmake first, and Visual Studio (or MS Build) is needed in Windows.

git clone --recursive https://github.com/Microsoft/LightGBM
cd LightGBM/python-package
python setup.py install

sudo (or administrator rights in Windows) may is needed to perform python setup.py install.

Use python setup.py install --mingw to use MinGW in Windows.

Use python setup.py install --gpu to enable GPU support. Boost and OpenCL are needed: details for installation can be found in gpu-support.

Examples

Refer to the walk through examples in python-guide folder

Troubleshooting

Refer to FAQ

Developments

The code style of python package follows pep8. If you would like to make a contribution and not familiar with pep-8, please check the pep8 style guide first. Otherwise, the check won’t pass. You should be careful about:

• E1 Indentation (check pep8 link above)

• E202 whitespace before and after brackets

• E225 missing whitespace around operator

• E226 missing whitespace around arithmetic operator

• E261 at least two spaces before inline comment

• E301 expected 1 blank line in front of and at the end of a method

• E302 expected 2 blank lines in front of and at the end of a function or a class

E501 can be ignored (line too long).