[ci] rebalanced Linux tests (#1663)

* refined Travis tests

* refined VSTS Linux part

* cleanup

* added possibility to test Clang at VSTS

* simplified cp command

.travis.yml

@@ -11,16 +11,14 @@ os:
 
 env:
   global:  # default values
-    - COMPILER=gcc
+    - COMPILER=clang
     - PYTHON_VERSION=3.7
   matrix:
     - TASK=regular PYTHON_VERSION=3.6
-    - TASK=regular COMPILER=clang
-    - TASK=pylint
-    - TASK=check-docs
-    - TASK=if-else
     - TASK=sdist PYTHON_VERSION=2.7
     - TASK=bdist
+    - TASK=pylint
+    - TASK=check-docs
     - TASK=mpi METHOD=source
     - TASK=mpi METHOD=pip
     - TASK=gpu METHOD=source PYTHON_VERSION=3.5
@@ -32,8 +30,6 @@ matrix:
       env: TASK=gpu METHOD=source PYTHON_VERSION=3.5
     - os: osx
       env: TASK=gpu METHOD=pip PYTHON_VERSION=3.6
-    - os: osx
-      env: TASK=if-else
     - os: osx
       env: TASK=pylint
     - os: osx
@@ -44,10 +40,10 @@ before_install:
   - test -n $CXX && unset CXX
   - export PATH="$HOME/miniconda/bin:$PATH"
   - export LGB_VER=$(head -n 1 VERSION.txt)
-  - export AMDAPPSDK=$HOME/AMDAPPSDK
-  - export LD_LIBRARY_PATH="$AMDAPPSDK/lib/x86_64:$LD_LIBRARY_PATH"
+  - export AMDAPPSDK_PATH=$HOME/AMDAPPSDK
+  - export LD_LIBRARY_PATH="$AMDAPPSDK_PATH/lib/x86_64:$LD_LIBRARY_PATH"
   - export LD_LIBRARY_PATH="/usr/local/clang/lib:$LD_LIBRARY_PATH"  # fix error "libomp.so: cannot open shared object file: No such file or directory" on Linux with Clang
-  - export OPENCL_VENDOR_PATH=$AMDAPPSDK/etc/OpenCL/vendors
+  - export OPENCL_VENDOR_PATH=$AMDAPPSDK_PATH/etc/OpenCL/vendors
 
 install:
   - bash .travis/setup.sh

.travis/setup.sh

@@ -23,6 +23,13 @@ else  # Linux
     fi
     if [[ $TASK == "gpu" ]]; then
         sudo apt-get install -y ocl-icd-opencl-dev
+        wget -q https://github.com/Microsoft/LightGBM/releases/download/v2.0.12/AMD-APP-SDKInstaller-v3.0.130.136-GA-linux64.tar.bz2
+        tar -xjf AMD-APP-SDK*.tar.bz2
+        mkdir -p $OPENCL_VENDOR_PATH
+        mkdir -p $AMDAPPSDK_PATH
+        sh AMD-APP-SDK*.sh --tar -xf -C $AMDAPPSDK_PATH
+        mv $AMDAPPSDK_PATH/lib/x86_64/sdk/* $AMDAPPSDK_PATH/lib/x86_64/
+        echo libamdocl64.so > $OPENCL_VENDOR_PATH/amdocl64.icd
     fi
     wget -O conda.sh https://repo.continuum.io/miniconda/Miniconda${PYTHON_VERSION:0:1}-latest-Linux-x86_64.sh
 fi
@@ -30,12 +37,3 @@ fi
 sh conda.sh -b -p $HOME/miniconda
 conda config --set always_yes yes --set changeps1 no
 conda update -q conda
-
-if [[ $TASK == "gpu" ]] && [[ $TRAVIS_OS_NAME == "linux" ]]; then
-    wget https://github.com/Microsoft/LightGBM/releases/download/v2.0.12/AMD-APP-SDKInstaller-v3.0.130.136-GA-linux64.tar.bz2
-    tar -xjf AMD-APP-SDK*.tar.bz2
-    mkdir -p $OPENCL_VENDOR_PATH
-    sh AMD-APP-SDK*.sh --tar -xf -C $AMDAPPSDK
-    mv $AMDAPPSDK/lib/x86_64/sdk/* $AMDAPPSDK/lib/x86_64/
-    echo libamdocl64.so > $OPENCL_VENDOR_PATH/amdocl64.icd
-fi

.travis/test.sh

@@ -76,7 +76,7 @@ elif [[ $TASK == "bdist" ]]; then
         cd $TRAVIS_BUILD_DIR/python-package && python setup.py bdist_wheel --plat-name=manylinux1_x86_64 --universal || exit -1
     fi
     pip install $TRAVIS_BUILD_DIR/python-package/dist/*.whl || exit -1
-    pytest $TRAVIS_BUILD_DIR/tests/python_package_test || exit -1
+    pytest $TRAVIS_BUILD_DIR/tests || exit -1
     exit 0
 fi
 
@@ -86,7 +86,7 @@ if [[ $TASK == "gpu" ]]; then
     grep -q 'std::string device_type = "gpu"' $TRAVIS_BUILD_DIR/include/LightGBM/config.h || exit -1  # make sure that changes were really done
     if [[ $METHOD == "pip" ]]; then
         cd $TRAVIS_BUILD_DIR/python-package && python setup.py sdist || exit -1
-        pip install $TRAVIS_BUILD_DIR/python-package/dist/lightgbm-$LGB_VER.tar.gz -v --install-option=--gpu --install-option="--boost-root=$HOME/miniconda/envs/test-env/" --install-option="--opencl-include-dir=$AMDAPPSDK/include/" || exit -1
+        pip install $TRAVIS_BUILD_DIR/python-package/dist/lightgbm-$LGB_VER.tar.gz -v --install-option=--gpu --install-option="--boost-root=$HOME/miniconda/envs/test-env/" --install-option="--opencl-include-dir=$AMDAPPSDK_PATH/include/" || exit -1
         pytest $TRAVIS_BUILD_DIR/tests/python_package_test || exit -1
         exit 0
     fi
@@ -103,7 +103,7 @@ if [[ $TASK == "mpi" ]]; then
     fi
     cmake -DUSE_MPI=ON ..
 elif [[ $TASK == "gpu" ]]; then
-    cmake -DUSE_GPU=ON -DBOOST_ROOT=$HOME/miniconda/envs/test-env/ -DOpenCL_INCLUDE_DIR=$AMDAPPSDK/include/ ..
+    cmake -DUSE_GPU=ON -DBOOST_ROOT=$HOME/miniconda/envs/test-env/ -DOpenCL_INCLUDE_DIR=$AMDAPPSDK_PATH/include/ ..
 else
     cmake ..
 fi
@@ -111,7 +111,7 @@ fi
 make _lightgbm || exit -1
 
 cd $TRAVIS_BUILD_DIR/python-package && python setup.py install --precompile || exit -1
-pytest $TRAVIS_BUILD_DIR || exit -1
+pytest $TRAVIS_BUILD_DIR/tests || exit -1
 
 if [[ $TASK == "regular" ]]; then
     cd $TRAVIS_BUILD_DIR/examples/python-guide
@@ -119,5 +119,6 @@ if [[ $TASK == "regular" ]]; then
 import matplotlib\
 matplotlib.use\(\"Agg\"\)\
 ' plot_example.py  # prevent interactive window mode
+    sed -i'.bak' 's/graph.render(view=True)/graph.render(view=False)/' plot_example.py
     for f in *.py; do python $f || exit -1; done  # run all examples
 fi

.vsts-ci.yml

 variables:
-  PYTHON_VERSION: 3.6
+  PYTHON_VERSION: 3.7
   CONDA_ENV: test-env
 phases:
 ###########################################
 - phase: Linux
 ###########################################
+  variables:
+    COMPILER: gcc
   queue:
     name: 'Hosted Linux Preview'
-    parallel: 9
+    parallel: 6
     matrix:
       regular:
         TASK: regular
-      mpi:
-        TASK: mpi
-        PYTHON_VERSION: 2.7
-      pylint: 
-        TASK: pylint
-      inference:
-        TASK: if-else
       sdist:
         TASK: sdist
-        PYTHON_VERSION: 3.4
+        PYTHON_VERSION: 3.5
       bdist:
         TASK: bdist
-        PYTHON_VERSION: 3.5
-      gpu_1:
-        TASK: gpu 
+        PYTHON_VERSION: 3.6
+      inference:
+        TASK: if-else
+      mpi_source:
+        TASK: mpi
         METHOD: source
-      gpu_2:
-        TASK: gpu 
-        METHOD: pip
+        PYTHON_VERSION: 2.7
+      gpu_source:
+        TASK: gpu
+        METHOD: source
+        PYTHON_VERSION: 3.6
   steps:
   - task: CondaEnvironment@0
     inputs:
+      updateConda: true
       environmentName: $(CONDA_ENV)
       packageSpecs: 'python=$(PYTHON_VERSION)'
       createOptions: '-q'
-  - script: | 
-      sudo apt-get update
-      export LGB_VER=$(head -n 1 VERSION.txt)
-      export AMDAPPSDK=$HOME/AMDAPPSDK
-      export LD_LIBRARY_PATH="$AMDAPPSDK/lib/x86_64:$LD_LIBRARY_PATH"
-      export OPENCL_VENDOR_PATH=$AMDAPPSDK/etc/OpenCL/vendors
-      if [[ $TASK == "mpi" ]]; then
-          sudo apt-get install -y libopenmpi-dev openmpi-bin
-      fi
-      if [[ $TASK == "gpu" ]]; then
-          sudo apt-get install --no-install-recommends -y ocl-icd-opencl-dev libboost-dev libboost-system-dev libboost-filesystem-dev
-          wget -q https://github.com/Microsoft/LightGBM/releases/download/v2.0.12/AMD-APP-SDKInstaller-v3.0.130.136-GA-linux64.tar.bz2
-          tar -xjf AMD-APP-SDK*.tar.bz2
-          mkdir -p $OPENCL_VENDOR_PATH
-          sh AMD-APP-SDK*.sh --tar -xf -C $AMDAPPSDK
-          mv $AMDAPPSDK/lib/x86_64/sdk/* $AMDAPPSDK/lib/x86_64/
-          echo libamdocl64.so > $OPENCL_VENDOR_PATH/amdocl64.icd
-      fi
-      bash .vsts-ci/test.sh
+  - script: |
+      echo "##vso[task.setvariable variable=LGB_VER]$(head -n 1 VERSION.txt)"
+      AMDAPPSDK_PATH=$AGENT_HOMEDIRECTORY/AMDAPPSDK
+      echo "##vso[task.setvariable variable=AMDAPPSDK_PATH]$AMDAPPSDK_PATH"
+      LD_LIBRARY_PATH=$AMDAPPSDK_PATH/lib/x86_64:$LD_LIBRARY_PATH
+      echo "##vso[task.setvariable variable=LD_LIBRARY_PATH]$LD_LIBRARY_PATH"
+      echo "##vso[task.setvariable variable=OPENCL_VENDOR_PATH]$AMDAPPSDK_PATH/etc/OpenCL/vendors"
+      chmod +x $BUILD_SOURCESDIRECTORY/.vsts-ci/setup.sh
+      chmod +x $BUILD_SOURCESDIRECTORY/.vsts-ci/test.sh
+    displayName: 'Set variables'
+  - bash: $(Build.SourcesDirectory)/.vsts-ci/setup.sh
+    displayName: Setup
+  - bash: $(Build.SourcesDirectory)/.vsts-ci/test.sh
+    displayName: Test
   - task: PublishBuildArtifacts@1
     condition: and(succeeded(), startsWith(variables['Build.SourceBranch'], 'refs/tags/'))
     inputs:
-      pathtoPublish: '$(Build.ArtifactStagingDirectory)' 
+      pathtoPublish: '$(Build.ArtifactStagingDirectory)'
       artifactName: PackageAssets
       artifactType: container
 ###########################################

.vsts-ci/setup.sh

+#!/bin/bash
+
+if [[ $COMPILER == "clang" ]]; then
+    update-alternatives --install /usr/bin/clang++ clang++ /usr/bin/clang++-6.0 100
+    update-alternatives --install /usr/bin/clang clang /usr/bin/clang-6.0 100
+    sudo apt-get update
+    sudo apt-get install libomp-dev
+fi
+if [[ $TASK == "mpi" ]]; then
+    sudo apt-get update
+    sudo apt-get install -y libopenmpi-dev openmpi-bin
+fi
+if [[ $TASK == "gpu" ]]; then
+    sudo apt-get update
+    sudo apt-get install --no-install-recommends -y ocl-icd-opencl-dev libboost-dev libboost-system-dev libboost-filesystem-dev
+    cd $AGENT_HOMEDIRECTORY
+    wget -q https://github.com/Microsoft/LightGBM/releases/download/v2.0.12/AMD-APP-SDKInstaller-v3.0.130.136-GA-linux64.tar.bz2
+    tar -xjf AMD-APP-SDK*.tar.bz2
+    mkdir -p $OPENCL_VENDOR_PATH
+    mkdir -p $AMDAPPSDK_PATH
+    sh AMD-APP-SDK*.sh --tar -xf -C $AMDAPPSDK_PATH
+    mv $AMDAPPSDK_PATH/lib/x86_64/sdk/* $AMDAPPSDK_PATH/lib/x86_64/
+    echo libamdocl64.so > $OPENCL_VENDOR_PATH/amdocl64.icd
+fi

.vsts-ci/test.sh

 #!/bin/bash
 
-cd ${BUILD_REPOSITORY_LOCALPATH}
-
-if [[ $TASK == "check-docs" ]]; then
-    if [[ $AGENT_OS == "Linux" ]]; then
-        sudo apt-get install linkchecker -y
-    fi
-    if [[ ${PYTHON_VERSION} == "2.7" ]]; then
-        conda install -y -n $CONDA_ENV mock
-    fi
-    conda install -y -n $CONDA_ENV sphinx "sphinx_rtd_theme>=0.3"  # html5validator
-    pip install rstcheck
-    cd ${BUILD_REPOSITORY_LOCALPATH}/python-package
-    rstcheck --report warning `find . -type f -name "*.rst"` || exit -1
-    cd ${BUILD_REPOSITORY_LOCALPATH}/docs
-    rstcheck --report warning --ignore-directives=autoclass,autofunction `find . -type f -name "*.rst"` || exit -1
-    make html || exit -1
-    find ./_build/html/ -type f -name '*.html' -exec \
-    sed -i -e 's;\(\.\/[^.]*\.\)rst\([^[:space:]]*\);\1html\2;g' {} \;  # emulate js function
-#    html5validator --root ./_build/html/ || exit -1
-    if [[ $AGENT_OS == "Linux" ]]; then
-        linkchecker --config=.linkcheckerrc ./_build/html/*.html || exit -1
-    fi
-    exit 0
+if [[ $AGENT_OS == "Linux" ]] && [[ $COMPILER == "clang" ]]; then
+    export CXX=clang++
+    export CC=clang
 fi
 
+cd $BUILD_SOURCESDIRECTORY
+
 if [[ $TASK == "pylint" ]]; then
     conda install -y -n $CONDA_ENV pycodestyle
     pycodestyle --ignore=E501,W503 --exclude=./compute,./docs,./.nuget . || exit -1
@@ -33,10 +15,10 @@ fi
 
 if [[ $TASK == "if-else" ]]; then
     conda install -y -n $CONDA_ENV numpy
-    mkdir build && cd build && cmake .. && make lightgbm || exit -1
-    cd ${BUILD_REPOSITORY_LOCALPATH}/tests/cpp_test && ../../lightgbm config=train.conf convert_model_language=cpp convert_model=../../src/boosting/gbdt_prediction.cpp && ../../lightgbm config=predict.conf output_result=origin.pred || exit -1
-    cd ${BUILD_REPOSITORY_LOCALPATH}/build && make lightgbm || exit -1
-    cd ${BUILD_REPOSITORY_LOCALPATH}/tests/cpp_test && ../../lightgbm config=predict.conf output_result=ifelse.pred && python test.py || exit -1
+    mkdir $BUILD_SOURCESDIRECTORY/build && cd $BUILD_SOURCESDIRECTORY/build && cmake .. && make lightgbm || exit -1
+    cd $BUILD_SOURCESDIRECTORY/tests/cpp_test && ../../lightgbm config=train.conf convert_model_language=cpp convert_model=../../src/boosting/gbdt_prediction.cpp && ../../lightgbm config=predict.conf output_result=origin.pred || exit -1
+    cd $BUILD_SOURCESDIRECTORY/build && make lightgbm || exit -1
+    cd $BUILD_SOURCESDIRECTORY/tests/cpp_test && ../../lightgbm config=predict.conf output_result=ifelse.pred && python test.py || exit -1
     exit 0
 fi
 
@@ -47,10 +29,10 @@ if [[ $AGENT_OS == "Darwin" ]] ; then
 fi
 
 if [[ $TASK == "sdist" ]]; then
-    cd ${BUILD_REPOSITORY_LOCALPATH}/python-package && python setup.py sdist || exit -1
-    pip install ${BUILD_REPOSITORY_LOCALPATH}/python-package/dist/lightgbm-$LGB_VER.tar.gz -v || exit -1
-    cp ${BUILD_REPOSITORY_LOCALPATH}/python-package/dist/lightgbm-$LGB_VER.tar.gz ${BUILD_ARTIFACTSTAGINGDIRECTORY}/lightgbm-$LGB_VER.tar.gz
-    pytest ${BUILD_REPOSITORY_LOCALPATH}/tests/python_package_test || exit -1
+    cd $BUILD_SOURCESDIRECTORY/python-package && python setup.py sdist || exit -1
+    pip install $BUILD_SOURCESDIRECTORY/python-package/dist/lightgbm-$LGB_VER.tar.gz -v || exit -1
+    cp $BUILD_SOURCESDIRECTORY/python-package/dist/lightgbm-$LGB_VER.tar.gz $BUILD_ARTIFACTSTAGINGDIRECTORY
+    pytest $BUILD_SOURCESDIRECTORY/tests/python_package_test || exit -1
     exit 0
 elif [[ $TASK == "bdist" ]]; then
     if [[ $AGENT_OS == "Darwin" ]]; then
@@ -58,55 +40,57 @@ elif [[ $TASK == "bdist" ]]; then
         cp dist/lightgbm-$LGB_VER-py2.py3-none-macdarwin.whl ${BUILD_ARTIFACTSTAGINGDIRECTORY}/lightgbm-$LGB_VER-py2.py3-none-macosx_10_6_x86_64.macosx_10_7_x86_64.macosx_10_8_x86_64.macosx_10_9_x86_64.macosx_10_10_x86_64.macosx_10_11_x86_64.macosx_10_12_x86_64.macosx_10_13_x86_64.whl
         mv dist/lightgbm-$LGB_VER-py2.py3-none-macdarwin.whl dist/lightgbm-$LGB_VER-py2.py3-none-macosx_10_6_x86_64.macosx_10_7_x86_64.macosx_10_8_x86_64.macosx_10_9_x86_64.macosx_10_10_x86_64.macosx_10_11_x86_64.macosx_10_12_x86_64.macosx_10_13_x86_64.whl
     else
-        cd ${BUILD_REPOSITORY_LOCALPATH}/python-package && python setup.py bdist_wheel --plat-name=manylinux1_x86_64 --universal || exit -1
-        cp dist/lightgbm-$LGB_VER-py2.py3-none-manylinux1_x86_64.whl ${BUILD_ARTIFACTSTAGINGDIRECTORY}/lightgbm-$LGB_VER-py2.py3-none-manylinux1_x86_64.whl
+        cd $BUILD_SOURCESDIRECTORY/python-package && python setup.py bdist_wheel --plat-name=manylinux1_x86_64 --universal || exit -1
+        cp dist/lightgbm-$LGB_VER-py2.py3-none-manylinux1_x86_64.whl $BUILD_ARTIFACTSTAGINGDIRECTORY
     fi
-    pip install ${BUILD_REPOSITORY_LOCALPATH}/python-package/dist/*.whl || exit -1
-    pytest ${BUILD_REPOSITORY_LOCALPATH}/tests/python_package_test || exit -1
-    
+    pip install $BUILD_SOURCESDIRECTORY/python-package/dist/*.whl || exit -1
+    pytest $BUILD_SOURCESDIRECTORY/tests/python_package_test || exit -1
     exit 0
 fi
 
 if [[ $TASK == "gpu" ]]; then
-    sed -i 's/std::string device_type = "cpu";/std::string device_type = "gpu";/' ${BUILD_REPOSITORY_LOCALPATH}/include/LightGBM/config.h
-    grep -q 'std::string device_type = "gpu"' ${BUILD_REPOSITORY_LOCALPATH}/include/LightGBM/config.h || exit -1  # make sure that changes were really done
+    sed -i'.bak' 's/std::string device_type = "cpu";/std::string device_type = "gpu";/' $BUILD_SOURCESDIRECTORY/include/LightGBM/config.h
+    grep -q 'std::string device_type = "gpu"' $BUILD_SOURCESDIRECTORY/include/LightGBM/config.h || exit -1  # make sure that changes were really done
     if [[ $METHOD == "pip" ]]; then
-        cd ${BUILD_REPOSITORY_LOCALPATH}/python-package && python setup.py sdist || exit -1
-        pip install ${BUILD_REPOSITORY_LOCALPATH}/python-package/dist/lightgbm-$LGB_VER.tar.gz -v --install-option=--gpu --install-option="--opencl-include-dir=$AMDAPPSDK/include/" || exit -1
-        pytest ${BUILD_REPOSITORY_LOCALPATH}/tests/python_package_test || exit -1
+        cd $BUILD_SOURCESDIRECTORY/python-package && python setup.py sdist || exit -1
+        pip install $BUILD_SOURCESDIRECTORY/python-package/dist/lightgbm-$LGB_VER.tar.gz -v --install-option=--gpu --install-option="--opencl-include-dir=$AMDAPPSDK_PATH/include/" || exit -1
+        pytest $BUILD_SOURCESDIRECTORY/tests/python_package_test || exit -1
         exit 0
     fi
 fi
 
-mkdir build && cd build
+mkdir $BUILD_SOURCESDIRECTORY/build && cd $BUILD_SOURCESDIRECTORY/build
 
 if [[ $TASK == "mpi" ]]; then
-    cd ${BUILD_REPOSITORY_LOCALPATH}/python-package && python setup.py sdist || exit -1
-    pip install ${BUILD_REPOSITORY_LOCALPATH}/python-package/dist/lightgbm-$LGB_VER.tar.gz -v --install-option=--mpi || exit -1
-    cd ${BUILD_REPOSITORY_LOCALPATH}/build
+    if [[ $METHOD == "pip" ]]; then
+        cd $BUILD_SOURCESDIRECTORY/python-package && python setup.py sdist || exit -1
+        pip install $BUILD_SOURCESDIRECTORY/python-package/dist/lightgbm-$LGB_VER.tar.gz -v --install-option=--mpi || exit -1
+        pytest $BUILD_SOURCESDIRECTORY/tests/python_package_test || exit -1
+        exit 0
+    fi
     cmake -DUSE_MPI=ON ..
 elif [[ $TASK == "gpu" ]]; then
-    cmake -DUSE_GPU=ON -DOpenCL_INCLUDE_DIR=$AMDAPPSDK/include/ ..
+    cmake -DUSE_GPU=ON -DOpenCL_INCLUDE_DIR=$AMDAPPSDK_PATH/include/ ..
 else
     cmake ..
 fi
 
 make _lightgbm || exit -1
 
-cd ${BUILD_REPOSITORY_LOCALPATH}/python-package && python setup.py install --precompile || exit -1
-pytest ${BUILD_REPOSITORY_LOCALPATH} || exit -1
+cd $BUILD_SOURCESDIRECTORY/python-package && python setup.py install --precompile || exit -1
+pytest $BUILD_SOURCESDIRECTORY/tests || exit -1
 
 if [[ $TASK == "regular" ]]; then
     if [[ $AGENT_OS == "Darwin" ]]; then
         cp ${BUILD_REPOSITORY_LOCALPATH}/lib_lightgbm.so ${BUILD_ARTIFACTSTAGINGDIRECTORY}/lib_lightgbm.dylib
     else
-        cp ${BUILD_REPOSITORY_LOCALPATH}/lib_lightgbm.so ${BUILD_ARTIFACTSTAGINGDIRECTORY}/lib_lightgbm.so
+        cp $BUILD_SOURCESDIRECTORY/lib_lightgbm.so $BUILD_ARTIFACTSTAGINGDIRECTORY/lib_lightgbm.so
     fi
-    cd ${BUILD_REPOSITORY_LOCALPATH}/examples/python-guide
+    cd $BUILD_SOURCESDIRECTORY/examples/python-guide
     sed -i'.bak' '/import lightgbm as lgb/a\
 import matplotlib\
 matplotlib.use\(\"Agg\"\)\
 ' plot_example.py  # prevent interactive window mode
-    sed -i 's/graph.render(view=True)/graph.render(view=False)/' plot_example.py
+    sed -i'.bak' 's/graph.render(view=True)/graph.render(view=False)/' plot_example.py
     for f in *.py; do python $f || exit -1; done  # run all examples
 fi