support py3 in setup.py (#48905)

* support py3 in setup.py

* support setup.py bdist_wheel in py3

* support py3 in setup.py

* modify run_setup

paddle/scripts/paddle_build.sh

@@ -769,8 +769,8 @@ function run_linux_cpu_test() {
     mkdir -p ${PADDLE_ROOT}/build
     cd ${PADDLE_ROOT}/build
     pip install hypothesis
-    if [ -d "${PADDLE_ROOT}/build/python/dist/" ]; then
-        pip install ${PADDLE_ROOT}/build/python/dist/*whl
+    if [ -d "${PADDLE_ROOT}/dist/" ]; then
+        pip install ${PADDLE_ROOT}/dist/*whl
     fi
     cp ${PADDLE_ROOT}/build/python/paddle/fluid/tests/unittests/op_test.py ${PADDLE_ROOT}/build/python
     cp ${PADDLE_ROOT}/build/python/paddle/fluid/tests/unittests/testsuite.py ${PADDLE_ROOT}/build/python
@@ -3463,6 +3463,12 @@ function check_coverage_build() {
 }
 function run_setup(){
     rm -rf ${PADDLE_ROOT}/build
+    # Build script will not fail if *.deb does not exist
+    rm *.deb 2>/dev/null || true
+    # Delete previous built egg packages
+    rm -rf ${PADDLE_ROOT}/dist 2>/dev/null || true
+    # Delete previous built paddle cache
+    rm -rf ${PADDLE_ROOT}/build/python/paddle 2>/dev/null || true
     startTime_s=`date +%s`
 
     SYSTEM=`uname -s`
@@ -3477,7 +3483,6 @@ function run_setup(){
                 export PYTHON_EXECUTABLE=/Library/Frameworks/Python.framework/Versions/3.7/bin/python3
                 export PYTHON_INCLUDE_DIR=/Library/Frameworks/Python.framework/Versions/3.7/include/python3.7m/
                 export PYTHON_LIBRARY=/Library/Frameworks/Python.framework/Versions/3.7/lib/libpython3.7m.dylib
-
                 pip3.7 install --user -r ${PADDLE_ROOT}/python/requirements.txt
             else
                 exit 1
@@ -3525,15 +3530,7 @@ function run_setup(){
     else
         if [ "$1" != "" ]; then
             echo "using python abi: $1"
-            if [ "$1" == "cp36-cp36m" ]; then
-                export LD_LIBRARY_PATH=/opt/_internal/cpython-3.6.0/lib/:${LD_LIBRARY_PATH}
-                export PATH=/opt/_internal/cpython-3.6.0/bin/:${PATH}
-                #after changing "PYTHON_LIBRARY:FILEPATH" to "PYTHON_LIBRARY" ,we can use export
-                export PYTHON_EXECUTABLE=/opt/_internal/cpython-3.6.0/bin/python3
-                export PYTHON_INCLUDE_DIR=/opt/_internal/cpython-3.6.0/include/python3.6m
-                export PYTHON_LIBRARIES=/opt/_internal/cpython-3.6.0/lib/libpython3.so
-                pip3.6 install -r ${PADDLE_ROOT}/python/requirements.txt
-            elif [ "$1" == "cp37-cp37m" ]; then
+            if [ "$1" == "cp37-cp37m" ]; then
                 export LD_LIBRARY_PATH=/opt/_internal/cpython-3.7.0/lib/:${LD_LIBRARY_PATH}
                 export PATH=/opt/_internal/cpython-3.7.0/bin/:${PATH}
                 #after changing "PYTHON_LIBRARY:FILEPATH" to "PYTHON_LIBRARY" ,we can use export
@@ -3651,7 +3648,7 @@ function run_setup(){
     # reset ccache zero stats for collect PR's actual hit rate
     ccache -z
 
-    python setup.py install;build_error=$?
+    python setup.py $2;build_error=$?
     
     # ci will collect ccache hit rate
     collect_ccache_hits
@@ -3871,7 +3868,7 @@ function main() {
         build_mac
         ;;
       cicheck_py37)
-        cmake_gen_and_build ${PYTHON_ABI:-""} ${parallel_number}
+        run_setup ${PYTHON_ABI:-""} bdist_wheel
         run_linux_cpu_test ${PYTHON_ABI:-""} ${PROC_RUN:-1}
         ;;
       test_cicheck_py37)
@@ -3884,7 +3881,7 @@ function main() {
         parallel_test
         ;;
       build_gpubox)
-        run_setup ${PYTHON_ABI:-""} 
+        run_setup ${PYTHON_ABI:-""} install
         ;;
       check_xpu)
         cmake_gen_and_build ${PYTHON_ABI:-""} ${parallel_number}