Update example_variables dag to use the default variable

Author: tuanavu

examples/intro-example/dags/example_variables.py

@@ -19,21 +19,21 @@
 
 
 # Config variables
-## Common
-# var1 = "value1"
-# var2 = [1, 2, 3]
-# var3 = {'k': 'value3'}
+# Common
+var1 = "value1"
+var2 = [1, 2, 3]
+var3 = {'k': 'value3'}
 
 ## 3 DB connections called
 # var1 = Variable.get("var1")
 # var2 = Variable.get("var2")
 # var3 = Variable.get("var3")
 
-## Recommended way
-dag_config = Variable.get("example_variables_config", deserialize_json=True)
-var1 = dag_config["var1"]
-var2 = dag_config["var2"]
-var3 = dag_config["var3"]
+# ## Recommended way
+# dag_config = Variable.get("example_variables_config", deserialize_json=True)
+# var1 = dag_config["var1"]
+# var2 = dag_config["var2"]
+# var3 = dag_config["var3"]
 
 start = DummyOperator(
     task_id="start",