parameter-dependent operations example unclear

[atravitz]

I'm unable to reproduce the below example for parameter-dependent operations, and I think that adding less-arbitrary naming might help clarify where this is useful.

class Project(FlowProject):
     pass


 def add_foo_workflow(bar):

     job.doc.setdefault('foo', dict())

     def foo_ran(job):
         return bar in job.doc.foo

     # Make sure to make the operation-name a function of the parameter(s)!
     @Project.operation('foo-{})'.format(bar))
     @Project.post(foo_ran)
     def foo(job):
         job.doc.foo[bar] = 'hello world!'


for bar in (4, 8, 15, 16, 23, 42):
    add_foo_workflow(bar=bar)