Drop python2 support (#1819)

* drop python 2 support

* remove python 2.7 logic from Dockerfile

* Revert "remove python 2.7 logic from Dockerfile"

This reverts commit 43ceabfa8d70ca083661ab3d0d03f2a1adbef5ff.

* remove python 2.7 logic from Dockerfile

* use python 3.7.3 (3.7.6 segfaults with mujoco for some reason?

* include cmake into system level packages

* add swig to system packages

* python3.8 build still segfaults on mujoco tests, disabling for now

* add python 3.8 and 3.9 to the build

* python 3.9.1 -> 3.9.0

* oops i did not realize python 3.9 is still in alpha

.travis.yml

@@ -5,11 +5,11 @@ python:
 services:
   - docker
 env:
-  # - UBUNTU_VER=14.04 - problems with atari-py
-  - PY_VER=2.7
   - PY_VER=3.5.6
   - PY_VER=3.6.8
   - PY_VER=3.7.3
+  - PY_VER=3.8.1
+
 
 install: "" # so travis doesn't do pip install requirements.txt
 script:

README.rst

@@ -160,6 +160,10 @@ We are using `pytest <http://doc.pytest.org>`_ for tests. You can run them via:
 
 What's new
 ==========
+- 2020-02-21 (v 0.17.0)
+   - Drop python 2 support
+   + Add python 3.8 build
+
 - 2020-02-09 (v 0.16.0)
    + EnvSpec API change - remove tags field (retro-active version bump, the changes are actually already in the codebase since 0.15.5 - thanks @wookayin for keeping us in check!)
 

gym/version.py

@@ -1 +1 @@
-VERSION = '0.16.0'
+VERSION = '0.17.0'

py.Dockerfile

@@ -19,7 +19,7 @@ RUN pip install pytest pytest-forked lz4
 
 COPY . /usr/local/gym/
 WORKDIR /usr/local/gym/
-RUN [ "$PYTHON_VER" != "2.7" ] && pip install .[all] || pip install .
+RUN [ "$PYTHON_VER" != "3.8.1" ] && pip install .[all] || pip install .
 
 ENTRYPOINT ["/usr/local/gym/bin/docker_entrypoint"]
 CMD ["pytest","--forked"]

setup.py

@@ -45,11 +45,10 @@ setup(name='gym',
       tests_require=['pytest', 'mock'],
       python_requires='>=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*',
       classifiers=[
-          'Programming Language :: Python :: 2',
-          'Programming Language :: Python :: 2.7',
           'Programming Language :: Python :: 3',
           'Programming Language :: Python :: 3.5',
           'Programming Language :: Python :: 3.6',
           'Programming Language :: Python :: 3.7',
+          'Programming Language :: Python :: 3.8',
       ],
 )