[EMAIL PROTECTED] wrote:
(snip)
> brings me onto another question that has been bugging me, which is, if
> I want to create components (as object instances) at run time (rather
> than through a python code imported in), how do I do this? i.e. if I
> hardcoded something like
> turbine1 = turbine(...)
> then python knows that turbine1 is a turbine. but if I had say some
> kind of user interface and I want to create turbine1 (or suchlike) on
> the fly, how do I actually do that? how do I create objects after run
> time?
Q&D possible solution, no error handling, etc
...just so you get an idea
# schema generated by a GUI
# or directly written in a .py config file
# or whatever
schema = {'turbine1': {'class': 'Turbine',
'upstream' : ('frobnicator2',),
'downstream' : () # nothing,
},
'frobnicator2' : {'class' : 'Frobnicator',
'upstream' : (),
'downstream' : ('frobnicator2',),
},
}
# code:
def get_class_by_name(name):
return globals()[name]
def chain_from_schema(schema):
objects = {}
for name, desc in schema:
klass = get_class_by_name(desc['class'])
objects[name] = klass()
for name, desc in schema:
target = objects[name]
ups = [objects[upname] for upname in desc['upstream']]
downs = [objects[downname] for downname in desc['downstream']]
target.links(upstream=ups, downstream=downs)
return objects
--
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in '[EMAIL PROTECTED]'.split('@')])"
--
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