Stop testing Python 2.7 and building Python 2.7 wheels. (#6601)

ci/stress_tests/run_application_stress_tests.sh

@@ -7,8 +7,7 @@
 # should be the latest commit on the branch "releases/<ray-version>".
 
 # This script runs all of the application tests.
-# Currently includes an IMPALA stress test and a SGD stress test.
-# on both Python 2.7 and 3.6.
+# Currently includes an IMPALA stress test and a SGD stress test on Python 3.6.
 # All tests use a separate cluster, and each cluster
 # will be destroyed upon test completion (or failure).
 

ci/travis/install-cython-examples.sh

@@ -9,14 +9,7 @@ echo "PYTHON is $PYTHON"
 
 cython_examples="$ROOT_DIR/../../doc/examples/cython"
 
-if [[ "$PYTHON" == "2.7" ]]; then
-
-   pushd $cython_examples
-   pip install --progress-bar=off scipy
-   python setup.py install --user
-   popd
-
-elif [[ "$PYTHON" == "3.5" ]]; then
+if [[ "$PYTHON" == "3.5" ]]; then
    export PATH="$HOME/miniconda/bin:$PATH"
 
    pushd $cython_examples

ci/travis/install-dependencies.sh

@@ -17,17 +17,7 @@ else
   exit 1
 fi
 
-if [[ "$PYTHON" == "2.7" ]] && [[ "$platform" == "linux" ]]; then
-  sudo apt-get update
-  sudo apt-get install -y build-essential curl python-dev python-numpy python-pip unzip tmux gdb
-  # Install miniconda.
-  wget -q https://repo.continuum.io/miniconda/Miniconda2-4.5.4-Linux-x86_64.sh -O miniconda.sh -nv
-  bash miniconda.sh -b -p $HOME/miniconda
-  export PATH="$HOME/miniconda/bin:$PATH"
-  pip install -q scipy tensorflow cython==0.29.0 gym opencv-python-headless pyyaml pandas==0.24.2 requests \
-    feather-format lxml openpyxl xlrd py-spy setproctitle faulthandler pytest-timeout mock networkx \
-    tabulate psutil kubernetes grpcio pytest-sugar pytest-rerunfailures
-elif [[ "$PYTHON" == "3.5" ]] && [[ "$platform" == "linux" ]]; then
+if [[ "$PYTHON" == "3.5" ]] && [[ "$platform" == "linux" ]]; then
   sudo apt-get update
   sudo apt-get install -y python-dev python-numpy build-essential curl unzip tmux gdb
   # Install miniconda.
@@ -38,14 +28,6 @@ elif [[ "$PYTHON" == "3.5" ]] && [[ "$platform" == "linux" ]]; then
     feather-format lxml openpyxl xlrd py-spy setproctitle pytest-timeout networkx tabulate psutil aiohttp \
     uvicorn dataclasses pygments werkzeug kubernetes flask grpcio pytest-sugar pytest-rerunfailures pytest-asyncio \
     blist
-elif [[ "$PYTHON" == "2.7" ]] && [[ "$platform" == "macosx" ]]; then
-  # Install miniconda.
-  wget -q https://repo.continuum.io/miniconda/Miniconda2-4.5.4-MacOSX-x86_64.sh -O miniconda.sh -nv
-  bash miniconda.sh -b -p $HOME/miniconda
-  export PATH="$HOME/miniconda/bin:$PATH"
-  pip install -q cython==0.29.0 tensorflow gym opencv-python-headless pyyaml pandas==0.24.2 requests \
-    feather-format lxml openpyxl xlrd py-spy setproctitle faulthandler pytest-timeout mock networkx \
-    tabulate psutil kubernetes grpcio pytest-sugar pytest-rerunfailures
 elif [[ "$PYTHON" == "3.5" ]] && [[ "$platform" == "macosx" ]]; then
   # Install miniconda.
   wget -q https://repo.continuum.io/miniconda/Miniconda3-4.5.4-MacOSX-x86_64.sh -O miniconda.sh -nv

ci/travis/install-ray.sh

@@ -16,13 +16,7 @@ if [[ "$TRAVIS" == "true" ]]; then
   echo "build --jobs=50" >> $HOME/.bazelrc
 fi
 
-if [[ "$PYTHON" == "2.7" ]]; then
-
-  pushd "$ROOT_DIR/../../python"
-    python setup.py install --user
-  popd
-
-elif [[ "$PYTHON" == "3.5" ]]; then
+if [[ "$PYTHON" == "3.5" ]]; then
   export PATH="$HOME/miniconda/bin:$PATH"
 
   pushd "$ROOT_DIR/../../python"

ci/travis/test-wheels.sh

@@ -25,25 +25,6 @@ TEST_SCRIPT="$TRAVIS_BUILD_DIR/python/ray/tests/test_microbenchmarks.py"
 UI_TEST_SCRIPT="$TRAVIS_BUILD_DIR/python/ray/tests/test_webui.py"
 
 if [[ "$platform" == "linux" ]]; then
-  # First test Python 2.7.
-
-  # Install miniconda.
-  wget --quiet https://repo.continuum.io/miniconda/Miniconda2-4.5.4-Linux-x86_64.sh -O miniconda2.sh
-  bash miniconda2.sh -b -p "$HOME/miniconda2"
-
-  PYTHON_EXE=$HOME/miniconda2/bin/python
-  PIP_CMD=$HOME/miniconda2/bin/pip
-
-  # Find the right wheel by grepping for the Python version.
-  PYTHON_WHEEL=$(find "$ROOT_DIR/../../.whl" -type f -maxdepth 1 -print | grep -m1 '27')
-
-  # Install the wheel.
-  $PIP_CMD install -q "$PYTHON_WHEEL"
-
-  # Run a simple test script to make sure that the wheel works.
-  INSTALLED_RAY_DIRECTORY=$(dirname "$($PYTHON_EXE -u -c "import ray; print(ray.__file__)" | tail -n1)")
-  $PYTHON_EXE "$TEST_SCRIPT"
-
   # Now test Python 3.6.
 
   # Install miniconda.
@@ -69,7 +50,7 @@ if [[ "$platform" == "linux" ]]; then
 
   # Check that the other wheels are present.
   NUMBER_OF_WHEELS=$(ls -1q "$ROOT_DIR"/../../.whl/*.whl | wc -l)
-  if [[ "$NUMBER_OF_WHEELS" != "4" ]]; then
+  if [[ "$NUMBER_OF_WHEELS" != "3" ]]; then
     echo "Wrong number of wheels found."
     ls -l "$ROOT_DIR/../.whl/"
     exit 2
@@ -77,13 +58,11 @@ if [[ "$platform" == "linux" ]]; then
 
 elif [[ "$platform" == "macosx" ]]; then
   MACPYTHON_PY_PREFIX=/Library/Frameworks/Python.framework/Versions
-  PY_MMS=("2.7"
-          "3.5"
+  PY_MMS=("3.5"
           "3.6"
           "3.7")
   # This array is just used to find the right wheel.
-  PY_WHEEL_VERSIONS=("27"
-                     "35"
+  PY_WHEEL_VERSIONS=("35"
                      "36"
                      "37")