Fix docker build error (#27735)

python/unittest_py/requirements.txt

@@ -2,4 +2,5 @@ PyGithub
 coverage
 pycrypto ; platform_system != "Windows"
 mock
+opencv-python<=4.2.0.32
 visualdl ; python_version>="3.5"

tools/dockerfile/Dockerfile.ubuntu

@@ -156,19 +156,14 @@ RUN pip3 --no-cache-dir install -U wheel py-cpuinfo==5.0.0 && \
 
 RUN pip3 --no-cache-dir install 'pre-commit==1.10.4' 'ipython==5.3.0' && \
     pip3 --no-cache-dir install 'ipykernel==4.6.0' 'jupyter==1.0.0' && \
-    pip3 --no-cache-dir install opencv-python==4.2.0.32 && \
     pip3.6 --no-cache-dir install 'pre-commit==1.10.4' 'ipython==5.3.0' && \
     pip3.6 --no-cache-dir install 'ipykernel==4.6.0' 'jupyter==1.0.0' && \
-    pip3.6 --no-cache-dir install opencv-python==4.2.0.32 && \
     pip3.7 --no-cache-dir install 'pre-commit==1.10.4' 'ipython==5.3.0' && \
     pip3.7 --no-cache-dir install 'ipykernel==4.6.0' 'jupyter==1.0.0' && \
-    pip3.7 --no-cache-dir install opencv-python==4.2.0.32 && \
     pip3.8 --no-cache-dir install 'pre-commit==1.10.4' 'ipython==5.3.0' && \
     pip3.8 --no-cache-dir install 'ipykernel==4.6.0' 'jupyter==1.0.0' && \
-    pip3.8 --no-cache-dir install opencv-python==4.2.0.32 && \
     pip --no-cache-dir install 'pre-commit==1.10.4' 'ipython==5.3.0' && \
-    pip --no-cache-dir install 'ipykernel==4.6.0' 'jupyter==1.0.0' && \
-    pip --no-cache-dir install opencv-python==4.2.0.32
+    pip --no-cache-dir install 'ipykernel==4.6.0'
 
 #For docstring checker
 RUN pip3 --no-cache-dir install pylint pytest astroid isort && \

tools/dockerfile/ubuntu16_dev.sh

@@ -28,11 +28,13 @@ function ref_whl(){
     ref_paddle3_whl=paddlepaddle${install_gpu}-${PADDLE_BRANCH}-cp35-cp35m-linux_x86_64.whl
     ref_paddle36_whl=paddlepaddle${install_gpu}-${PADDLE_BRANCH}-cp36-cp36m-linux_x86_64.whl
     ref_paddle37_whl=paddlepaddle${install_gpu}-${PADDLE_BRANCH}-cp37-cp37m-linux_x86_64.whl
+    ref_paddle38_whl=paddlepaddle${install_gpu}-${PADDLE_BRANCH}-cp38-cp38-linux_x86_64.whl
   else
     ref_paddle_whl=paddlepaddle${install_gpu}-${PADDLE_BRANCH}-cp27-cp27mu-linux_x86_64.whl
     ref_paddle3_whl=paddlepaddle${install_gpu}-${PADDLE_BRANCH}-cp35-cp35m-linux_x86_64.whl
     ref_paddle36_whl=paddlepaddle${install_gpu}-${PADDLE_BRANCH}-cp36-cp36m-linux_x86_64.whl
     ref_paddle37_whl=paddlepaddle${install_gpu}-${PADDLE_BRANCH}-cp37-cp37m-linux_x86_64.whl
+    ref_paddle38_whl=paddlepaddle${install_gpu}-${PADDLE_BRANCH}-cp38-cp38-linux_x86_64.whl
   fi
   
   if [[ ${PADDLE_BRANCH} != "0.0.0" && ${WITH_GPU} == "ON" ]]; then
@@ -40,11 +42,13 @@ function ref_whl(){
     ref_paddle3_whl=paddlepaddle${install_gpu}-${PADDLE_BRANCH}.post${ref_CUDA_MAJOR}${CUDNN_MAJOR}-cp35-cp35m-linux_x86_64.whl
     ref_paddle36_whl=paddlepaddle${install_gpu}-${PADDLE_BRANCH}.post${ref_CUDA_MAJOR}${CUDNN_MAJOR}-cp36-cp36m-linux_x86_64.whl
     ref_paddle37_whl=paddlepaddle${install_gpu}-${PADDLE_BRANCH}.post${ref_CUDA_MAJOR}${CUDNN_MAJOR}-cp37-cp37m-linux_x86_64.whl
+    ref_paddle38_whl=paddlepaddle${install_gpu}-${PADDLE_BRANCH}.post${ref_CUDA_MAJOR}${CUDNN_MAJOR}-cp38-cp38-linux_x86_64.whl
   else
     ref_paddle_whl=paddlepaddle${install_gpu}-${PADDLE_BRANCH}-cp27-cp27mu-linux_x86_64.whl
     ref_paddle3_whl=paddlepaddle${install_gpu}-${PADDLE_BRANCH}-cp35-cp35m-linux_x86_64.whl
     ref_paddle36_whl=paddlepaddle${install_gpu}-${PADDLE_BRANCH}-cp36-cp36m-linux_x86_64.whl
     ref_paddle37_whl=paddlepaddle${install_gpu}-${PADDLE_BRANCH}-cp37-cp37m-linux_x86_64.whl
+    ref_paddle38_whl=paddlepaddle${install_gpu}-${PADDLE_BRANCH}-cp38-cp38-linux_x86_64.whl
   fi
 }
 
@@ -55,6 +59,7 @@ function install_whl(){
   sed -i "${dockerfile_line}i RUN wget ${ref_web}/${ref_paddle3_whl} && pip3.5 install ${ref_paddle3_whl} && rm  -f ${ref_paddle3_whl}" Dockerfile.tmp
   sed -i "${dockerfile_line}i RUN wget ${ref_web}/${ref_paddle36_whl} && pip3.6 install ${ref_paddle36_whl} && rm -f ${ref_paddle36_whl}" Dockerfile.tmp
   sed -i "${dockerfile_line}i RUN wget ${ref_web}/${ref_paddle37_whl} && pip3.7 install ${ref_paddle37_whl} && rm -f ${ref_paddle37_whl}" Dockerfile.tmp
+  sed -i "${dockerfile_line}i RUN wget ${ref_web}/${ref_paddle38_whl} && pip3.8 install ${ref_paddle38_whl} && rm -f ${ref_paddle38_whl}" Dockerfile.tmp
 }
 
 function install_gcc(){

tools/manylinux1/Dockerfile.cuda10_cudnn7_gcc8_ubuntu16

@@ -174,16 +174,12 @@ RUN pip3 --no-cache-dir install -U wheel py-cpuinfo==5.0.0 && \
 
 RUN pip3 --no-cache-dir install pre-commit==1.10.4 ipython==5.3.0  && \
     pip3 --no-cache-dir install ipykernel==4.6.0 jupyter==1.0.0  && \
-    pip3 --no-cache-dir install opencv-python  && \
     pip3.6 --no-cache-dir install pre-commit==1.10.4 ipython==5.3.0  && \
     pip3.6 --no-cache-dir install ipykernel==4.6.0 jupyter==1.0.0  && \
-    pip3.6 --no-cache-dir install opencv-python  && \
     pip3.7 --no-cache-dir install pre-commit==1.10.4 ipython==5.3.0  && \
     pip3.7 --no-cache-dir install ipykernel==4.6.0 jupyter==1.0.0  && \
-    pip3.7 --no-cache-dir install opencv-python  && \
     pip --no-cache-dir install pre-commit==1.10.4 ipython==5.3.0  && \
-    pip --no-cache-dir install ipykernel==4.6.0 jupyter==1.0.0  && \
-    pip --no-cache-dir install  opencv-python
+    pip --no-cache-dir install ipykernel==4.6.0 
 
 #For docstring checker
 RUN pip3 --no-cache-dir install pylint pytest astroid isort