[Twisted-Python] serializing inline callbacks

[Dustin J. Mitchell]

Async programming aside, this mode of chaining multiple methods
doesn't sit well with me:

def A()
  # .. do stuff
  B()

def B()
  # .. do stuff
  C()

I think it'd be more idiomatic to have a controlling method that
indicates the chaning:

def do_stuffs():
  A()
  B()
  C()
  D()
  D()
  D()

Now, translating that to async programming with inline callbacks is easy:

@defer.inlineCallbacks
def do_stuffs()
  yield A()
  yield B()
  yield C()
  yield D()
  yield D()
  yield D()

Dustin