pre_tasks.py

#
# Option 1: can be more compact but lots of sigils, different arg types, maybe confusing
#

@task(pre={
    'pretask1': None, # means no args
    'pretask2': ['positional', 'args', 'in a list'],
    'pretask3': {'keyword': 'args', 'in': 'a dict'},
})
def mytask():
    pass

# Could also still give a list of pre-tasks, with implied "no args" invocation, as we do now
@task(pre=['pretask1', 'pretask2'])
def mytask2():
    pass


#
# Option 2: use 1..N decorators so that it feels/looks more like a func call.
# but is now more verbose, and possible confusion re: @pre('task1', 'task2') not
# being a legal way to say 2 pre-tasks. Also possibly confusing if we continue to allow @task(pre=['task', 'names'])
#

@pre('pretask1') # No args
@pre('pretask2', 'positional', 'args')
@pre('pretask3', keyword='args')
@pre('pretask4', 'can now use', both='if desired')
@task
def mytask():
    pass