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Description:

panglery 1

panglery is a library for writing hooks for events in python.
Here’s a basic example of usage:
import panglery
p = panglery.Pangler()

@p.subscribe(event='example', needs=['spam'])
def example_hook(p, spam):
print spam

p.trigger(event='example', spam='eggs')
# prints 'eggs'
And a little bit more involved:
@p.subscribe(needs=['spam'], returns=['spam'])
def modify_spam_hook(p, spam):
spam = spam + ' spam'
return {'spam': spam}

p.trigger(event='example', spam='eggs')
# prints 'eggs spam'
Hooks can also add parameters to an event which then trigger other hooks:
p = panglery.Pangler()

@p.subscribe(needs=['spam'], returns=['eggs'])
def make_eggs_hook(p, spam):
eggs = spam + ' eggs'
return {'eggs': eggs}

@p.subscribe(event='example', needs=['eggs']):
def eggs_hook(p, eggs):
print eggs

p.trigger(event='example', spam='eggs')
# prints 'eggs eggs'
PanglerAggregates can be used to aggregate together multiple Panglers across
all superclasses:
class ExampleBase(object):
p = panglery.PanglerAggregate('hooks')
hooks = panglery.Pangler()

@hooks.subscribe(event='example')
def example_hook_base(self, p):
print 'spam'

class ExampleDerived(ExampleBase):
hooks = panglery.Pangler()

@hooks.subscribe(event='example')
def example_hook_derived(self, p):
print 'eggs'

inst = ExampleDerived()
inst.p().trigger(event='example')
# prints 'spam' and 'eggs' in some order.