add gitignore

.gitignore

 model/
 *.ipynb_checkpoints/
-.idea
+.idea/
+.DS_Store
 # Byte-compiled / optimized / DLL files
 __pycache__/
 *.py[cod]

.idea/workspace.xml

@@ -120,6 +120,9 @@
       <module name="CPI" />
       <option name="INTERPRETER_OPTIONS" value="" />
       <option name="PARENT_ENVS" value="true" />
+      <envs>
+        <env name="PYTHONUNBUFFERED" value="1" />
+      </envs>
       <option name="SDK_HOME" value="" />
       <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$/utils" />
       <option name="IS_MODULE_SDK" value="true" />