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In the previous chapter, we saw how to define a variable for a task.
When all the tasks of the same family share the same variable value,
the value could be defined at the family level.
This is termed variable inheritance
In the examples below the variable could have been defined at the
level of the suite, achieving the same results.
Variables are inherited from the parent node.
If a variable is redefined lower in the tree, it is said to be overridden.
In this case, the new definition is the one being used.
It is possible to override the generated variables.
This is not recommended and you should understand all the consequences
if you decide to do so.
  

Text

Code Block
# Definition of the suite test.
suite test
   edit ECF_INCLUDE "$HOME/course"   # replace '$HOME' with the path to your home directory
   edit ECF_HOME    "$HOME/course"
   family f1
      edit SLEEP 20
      task t1
      task t2
   endfamily
endsuite

 


Python
Python
#!/usr/bin/env python2.7

 Code Block
languagepy
title$HOME/course/test.py
import os

import
from ecflow import Defs,Suite,Family,Task,Edit

def create_family_f1(
name
):
    
f1 =
return 
ecflow.
Family(
name )

"f1",
       
f1.add_variable("SLEEP", 20)

     Edit(SLEEP=20),
                
f1.add_task
Task("t1"),
         
f1.add_task("t2")

    
return
 
f1
  Task("t2"))
       


      
print
 
("Creating suite definition"
   
defs = ecflow.Defs(
)

suite
home =
 defs.add_suite("test")
suite.add_variable("ECF_INCLUDE",
 os.path.join(os.getenv("HOME"),
 
 "course")
)
suite.add_variable("ECF_HOME",

defs = Defs(
        Suite("test",
            
os.path.join(os.getenv("HOME"),  "course"))

suite.add_family(
Edit(ECF_INCLUDE=home,ECF_HOME=home),
            create_family_f1(
"f1"
))
 
)
print(defs) 
defs


print
 
("Checking job creation: .ecf -> .job0")  
 

print
 
(defs.check_job_creation())

print
 
("Saving definition to file 'test.def'")
defs.save_as_defs("test.def")
  
Quiz
Let us have a quiz. Consider the following suite:
 Code Block
suite test
   edit SLEEP 100
   family f1
      edit SLEEP 80
      task t1
      task t2
         edit SLEEP 9
      family g1
          edit SLEEP 89
          task x1
              edit SLEEP 10
          task x2
      endfamily
   endfamily
   family f2
     task t1
     task t2
         edit SLEEP 77
     family g2
          task x1
              edit SLEEP 12
          task x2
      endfamily
   endfamily
endsuite
Here is the value for SLEEP for the above suite. Make sure you understand this.

 
node
SLEEP
/test/f1/t180
/test/f1/t29
/test/f1/g1/x110
/test/f1/g1/x289
/test/f2/t1100
/test/f2/t277
/test/f2/g2/x112
/test/f2/g2/x2100
  

What to do
  1. Do the modifications
  2. Replace the suite
    python: python3 test.py
                 python3 client.py
    text:      ecflow_client --suspend=/test; ecflow_client --replace=/test test.def
  3. Watch in ecflow_ui .
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