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In Python, functions *are* objects! The example code, therefore, can be written this way:


def loony():
  print "You're a loony."

def newBrain():
  print "You might even need a new brain."

def afford():
  print "I couldn't afford a whole new brain."

# An object that holds commands:
class Macro:
  def __init__(self):
    self.commands = []
  def add(self, command): 
    self.commands.append(command) 
  def __call__(self):
    for c in self.commands:
      c()

macro = Macro()
macro.add(loony)
macro.add(newBrain)
macro.add(afford)
macro()

This deserves more than a passing mention! I think it is quite important. For example, it is common to say:


def byName(rec1, rec2):
  """ Comparator function to sort records by name """
  return cmp(rec1.name, rec2.name)

recordList.sort(byName)

Here we pass a "function object", in the most literal sense, as a Strategy to the sort() method.

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