Misc minor fixes to taskflow/examples

Change-Id: Iecf7693239d93e5a43cf5470bcfcdec605410ce4

taskflow/examples/persistence_example.py

@@ -20,6 +20,7 @@ import contextlib
 import logging
 import os
 import sys
+import tempfile
 import traceback
 
 logging.basicConfig(level=logging.ERROR)
@@ -36,8 +37,6 @@ from taskflow.persistence import logbook
 from taskflow import task
 from taskflow.utils import persistence_utils as p_utils
 
-import tempfile
-
 
 # INTRO: In this example we create two tasks, one that will say hi and one
 # that will say bye with optional capability to raise an error while
@@ -61,7 +60,7 @@ class HiTask(task.Task):
         print("Hi!")
 
     def revert(self, **kwargs):
-        print("Whooops, said hi to early, take that back!")
+        print("Whooops, said hi too early, take that back!")
 
 
 class ByeTask(task.Task):
@@ -77,9 +76,9 @@ class ByeTask(task.Task):
 
 # This generates your flow structure (at this stage nothing is ran).
 def make_flow(blowup=False):
-    flo = lf.Flow("hello-world")
-    flo.add(HiTask(), ByeTask(blowup))
-    return flo
+    flow = lf.Flow("hello-world")
+    flow.add(HiTask(), ByeTask(blowup))
+    return flow
 
 
 # Persist the flow and task state here, if the file exists already blowup
@@ -109,11 +108,11 @@ engine_config = {
 # Make a flow that will blowup if the file doesn't exist previously, if it
 # did exist, assume we won't blowup (and therefore this shows the undo
 # and redo that a flow will go through).
-flo = make_flow(blowup=blowup)
+flow = make_flow(blowup=blowup)
 print_wrapped("Running")
 
 try:
-    eng = engines.load(flo, **engine_config)
+    eng = engines.load(flow, **engine_config)
     eng.run()
     try:
         os.unlink(persist_filename)

taskflow/examples/resume_from_backend.py

@@ -131,10 +131,11 @@ print_wrapped("Resuming and running again")
 # example shows how another process may unsuspend a given flow and start it
 # again for situations where this is useful to-do (say the process running
 # the above flow crashes).
+flow2 = flow_factory()
 flowdetail2 = find_flow_detail(backend, logbook.uuid,
                                flowdetail.uuid)
-engine2 = taskflow.engines.load(flow_factory(),
-                                flow_detail=flowdetail,
+engine2 = taskflow.engines.load(flow2,
+                                flow_detail=flowdetail2,
                                 backend=backend)
 engine2.run()
-print_task_states(flowdetail, "At the end")
+print_task_states(flowdetail2, "At the end")

taskflow/examples/reverting_linear.py

@@ -39,7 +39,7 @@ from taskflow import task
 # phone ~calls~.
 #
 # This simulated calling makes it appear like all three calls occur or all
-# three don't occur (transactional like capabilities). No persistence layer is
+# three don't occur (transaction-like capabilities). No persistence layer is
 # used here so reverting and executing will not handle process failure.
 #
 # This example shows a basic usage of the taskflow structures without involving