def pause(self):
if self.depends_on:
self.depends_on.pause()
return Deferred.pause(self)
d.addCallback(callback_1)
print('Adding second callback.')
d.addCallback(callback_2)
print('Adding third callback.')
d.addCallback(callback_3)
print("""
Because the deferred was already fired, it
invoked each callback as soon as it was added.
Now we create a deferred and fire it, but
pause it first with the pause() method.
""")
# We do the same thing, but pause the deferred:
d = Deferred()
print('Pausing, then firing deferred.')
d.pause()
d.callback(0)
print('Adding callbacks.')
d.addCallback(callback_1)
d.addCallback(callback_2)
d.addCallback(callback_3)
print('Unpausing the deferred.')
d.unpause()
def pause(self):
if self.depends_on:
self.depends_on.pause()
return Deferred.pause(self)
