Fix two minor bugs in docs/examples

+ taskflow path in sys.path

+ listener => notifier

Change-Id: I0a657540571f9862e2adea5a40d03dfa3ce90e2b

docs/examples/reverting_linear.py

@@ -4,13 +4,11 @@ import sys
 
 logging.basicConfig(level=logging.ERROR)
 
-if not os.path.isfile(os.path.join(os.getcwd(), "taskflow", '__init__.py')):
+my_dir_path = os.path.dirname(os.path.abspath(__file__))
-    sys.path.insert(0, os.path.join(os.path.abspath(os.getcwd()), os.pardir))
+sys.path.insert(0, os.path.join(os.path.join(my_dir_path, os.pardir),
-else:
+                                os.pardir))
-    sys.path.insert(0, os.path.abspath(os.getcwd()))
 
 from taskflow import decorators
-
 from taskflow.patterns import linear_flow as lf
 
 

docs/examples/simple_linear.py

@@ -4,10 +4,9 @@ import sys
 
 logging.basicConfig(level=logging.ERROR)
 
-if not os.path.isfile(os.path.join(os.getcwd(), "taskflow", '__init__.py')):
+my_dir_path = os.path.dirname(os.path.abspath(__file__))
-    sys.path.insert(0, os.path.join(os.path.abspath(os.getcwd()), os.pardir))
+sys.path.insert(0, os.path.join(os.path.join(my_dir_path, os.pardir),
-else:
+                                os.pardir))
-    sys.path.insert(0, os.path.abspath(os.getcwd()))
 
 from taskflow.patterns import linear_flow as lf
 

docs/examples/simple_linear_listening.py

@@ -4,10 +4,9 @@ import sys
 
 logging.basicConfig(level=logging.ERROR)
 
-if not os.path.isfile(os.path.join(os.getcwd(), "taskflow", '__init__.py')):
+my_dir_path = os.path.dirname(os.path.abspath(__file__))
-    sys.path.insert(0, os.path.join(os.path.abspath(os.getcwd()), os.pardir))
+sys.path.insert(0, os.path.join(os.path.join(my_dir_path, os.pardir),
-else:
+                                os.pardir))
-    sys.path.insert(0, os.path.abspath(os.getcwd()))
 
 from taskflow.patterns import linear_flow as lf
 
@@ -33,8 +32,8 @@ def task_watch(context, state, flow, task, result=None):
 flow = lf.Flow("call-them")
 flow.add(call_jim)
 flow.add(call_joe)
-flow.task_listeners.append(task_watch)
+flow.task_notifier.register('*', task_watch)
-flow.listeners.append(flow_watch)
+flow.notifier.register('*', flow_watch)
 
 context = {
     "joe_number": 444,