Created
October 15, 2009 16:13
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Looking for a cleaner way to implement this pattern.
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def do_stuff(): | |
"""Does 3 things in serial""" | |
def cb_stuff1(unused): | |
print 'Doing stuff #1' | |
deferreds = [] | |
for obj in self.objects.values(): | |
deferreds.append(obj.do_something()) | |
return defer.DeferredList(deferreds) | |
def cb_stuff2(unused): | |
print 'Doing stuff #2' | |
deferreds2 = [] | |
for obj in self.objects.values(): | |
deferreds2.append(obj.do_something_else()) | |
return defer.DeferredList(deferreds2) | |
def cb_stuff3(unused): | |
print 'Doing stuff #3' | |
return some_other_action() | |
d = defer.Deferred() | |
d.addCallback(cb_stuff1) | |
d.addCallback(cb_stuff2) | |
d.addCallback(cb_stuff3) | |
d.callback(True) # just to trigger the chain | |
return d |
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