[FLINK-12330][python]Add integrated Tox for ensuring compatibility of…

… multi-version of python.

This closes apache#8355.

.gitignore

@@ -28,6 +28,11 @@ flink-runtime-web/web-dashboard/web/
 flink-python/dist/
 flink-python/build/
 flink-python/pyflink.egg-info/
+flink-python/.tox/
+flink-python/dev/download
+flink-python/dev/.conda/
+flink-python/dev/log/
+flink-python/dev/.stage.txt
 atlassian-ide-plugin.xml
 out/
 /docs/api

flink-dist/src/main/flink-bin/bin/pyflink-gateway-server.sh

@@ -47,7 +47,7 @@ do
     esac
 done
 
-log=$FLINK_LOG_DIR/flink-$FLINK_IDENT_STRING-client-$HOSTNAME.log
+log=$FLINK_LOG_DIR/flink-$FLINK_IDENT_STRING-python-$HOSTNAME.log
 log_setting=(-Dlog.file="$log" -Dlog4j.configuration=file:"$FLINK_CONF_DIR"/log4j-cli.properties -Dlogback.configurationFile=file:"$FLINK_CONF_DIR"/logback.xml)
 
 TABLE_JAR_PATH=`echo "$FLINK_ROOT_DIR"/opt/flink-table*.jar`

flink-python/README.md

@@ -10,15 +10,20 @@ In this initial version only Table API is supported, you can find the documentat
 
 ## Installation
 
-Currently, you can install PyFlink from Flink source code. 
-First, you need build the whole Flink project using `mvn clean install -DskipTests` and set the value of the environment variable FLINK_HOME to the `build-target` directory under the root directory of Flink.
-Then enter the directory where this README.md file is located and execute `python setup.py install` to install PyFlink on your device.
+Currently, we can install PyFlink from Flink source code. Enter the directory where this README.md file is located and install PyFlink on your device by executing 
 
-## Running Tests
+```
+python setup.py install
+```
 
-Currently you can perform an end-to-end test of PyFlink in the directory where this file is located with the following command:
+## Running test cases 
 
-    PYTHONPATH=$PYTHONPATH:./ python ./pyflink/table/tests/test_end_to_end.py
+Currently, we use conda and tox to verify the compatibility of the Flink Python API for multiple versions of Python and will integrate some useful plugins with tox, such as flake8.
+We can enter the directory where this README.md file is located and run test cases by executing
+
+```
+./dev/lint-python.sh
+```
 
 ## Python Requirements