1.. image:: https://travis-ci.org/agronholm/pythonfutures.svg?branch=master 2 :target: https://travis-ci.org/agronholm/pythonfutures 3 :alt: Build Status 4 5This is a backport of the `concurrent.futures`_ standard library module to Python 2. 6 7It should not be installed on Python 3, although there should be no harm in doing so, as the 8standard library takes precedence over third party libraries. 9 10To conditionally require this library only on Python 2, you can do this in your ``setup.py``: 11 12.. code-block:: python 13 14 setup( 15 ... 16 extras_require={ 17 ':python_version == "2.7"': ['futures'] 18 } 19 ) 20 21Or, using the newer syntax: 22 23.. code-block:: python 24 25 setup( 26 ... 27 install_requires={ 28 'futures; python_version == "2.7"' 29 } 30 ) 31 32.. warning:: The ``ProcessPoolExecutor`` class has known (unfixable) problems on Python 2 and 33 should not be relied on for mission critical work. 34 35.. _concurrent.futures: https://docs.python.org/library/concurrent.futures.html 36
