modlib.py

   1 class error(object):
   2         def __init__(self, desc):
   3                 self.errormsg = desc
   4         def __nonzero__(self):
   5                 return False #object will test to False
   6         def __repr__(self):
   7                 return '<modlib.error %r>' % self.errormsg
   8         def __str__(self):
   9                 return self.errormsg
  10
  11 class modlib(object):
  12         def __init__(self, name):
  13                 self.hooks = {}
  14                 self.parent = None
  15
  16                 self.name = name
  17
  18         def modstart(self, parent):
  19                 self.parent = parent
  20                 for cmd, func in self.hooks.iteritems():
  21                         self.parent.hook(cmd, func)
  22         def modstop(self, parent):
  23                 for cmd, func in self.hooks.iteritems():
  24                         self.parent.unhook(cmd, func)
  25
  26         def hook(self, cmd):
  27                 def realhook(func):
  28                         self.hooks[cmd] = func
  29                         if self.parent is not None:
  30                                 self.parent.hook(cmd, func)
  31                         return func
  32                 return realhook