diff options
Diffstat (limited to 'Demo/metaclasses/Meta.py')
| -rw-r--r-- | Demo/metaclasses/Meta.py | 114 |
1 files changed, 57 insertions, 57 deletions
diff --git a/Demo/metaclasses/Meta.py b/Demo/metaclasses/Meta.py index 76193c1..771205c 100644 --- a/Demo/metaclasses/Meta.py +++ b/Demo/metaclasses/Meta.py @@ -9,33 +9,33 @@ import types class MetaMethodWrapper: def __init__(self, func, inst): - self.func = func - self.inst = inst - self.__name__ = self.func.__name__ + self.func = func + self.inst = inst + self.__name__ = self.func.__name__ def __call__(self, *args, **kw): - return apply(self.func, (self.inst,) + args, kw) + return apply(self.func, (self.inst,) + args, kw) class MetaHelper: __methodwrapper__ = MetaMethodWrapper # For derived helpers to override def __helperinit__(self, formalclass): - self.__formalclass__ = formalclass + self.__formalclass__ = formalclass def __getattr__(self, name): - # Invoked for any attr not in the instance's __dict__ - try: - raw = self.__formalclass__.__getattr__(name) - except AttributeError: - try: - ga = self.__formalclass__.__getattr__('__usergetattr__') - except KeyError: - raise AttributeError, name - return ga(self, name) - if type(raw) != types.FunctionType: - return raw - return self.__methodwrapper__(raw, self) + # Invoked for any attr not in the instance's __dict__ + try: + raw = self.__formalclass__.__getattr__(name) + except AttributeError: + try: + ga = self.__formalclass__.__getattr__('__usergetattr__') + except KeyError: + raise AttributeError, name + return ga(self, name) + if type(raw) != types.FunctionType: + return raw + return self.__methodwrapper__(raw, self) class MetaClass: @@ -45,49 +45,49 @@ class MetaClass: """ - __helper__ = MetaHelper # For derived metaclasses to override + __helper__ = MetaHelper # For derived metaclasses to override __inited = 0 def __init__(self, name, bases, dict): - try: - ga = dict['__getattr__'] - except KeyError: - pass - else: - dict['__usergetattr__'] = ga - del dict['__getattr__'] - self.__name__ = name - self.__bases__ = bases - self.__realdict__ = dict - self.__inited = 1 + try: + ga = dict['__getattr__'] + except KeyError: + pass + else: + dict['__usergetattr__'] = ga + del dict['__getattr__'] + self.__name__ = name + self.__bases__ = bases + self.__realdict__ = dict + self.__inited = 1 def __getattr__(self, name): - try: - return self.__realdict__[name] - except KeyError: - for base in self.__bases__: - try: - return base.__getattr__(name) - except AttributeError: - pass - raise AttributeError, name + try: + return self.__realdict__[name] + except KeyError: + for base in self.__bases__: + try: + return base.__getattr__(name) + except AttributeError: + pass + raise AttributeError, name def __setattr__(self, name, value): - if not self.__inited: - self.__dict__[name] = value - else: - self.__realdict__[name] = value + if not self.__inited: + self.__dict__[name] = value + else: + self.__realdict__[name] = value def __call__(self, *args, **kw): - inst = self.__helper__() - inst.__helperinit__(self) - try: - init = inst.__getattr__('__init__') - except AttributeError: - init = lambda: None - apply(init, args, kw) - return inst + inst = self.__helper__() + inst.__helperinit__(self) + try: + init = inst.__getattr__('__init__') + except AttributeError: + init = lambda: None + apply(init, args, kw) + return inst Meta = MetaClass('Meta', (), {}) @@ -95,18 +95,18 @@ Meta = MetaClass('Meta', (), {}) def _test(): class C(Meta): - def __init__(self, *args): - print "__init__, args =", args - def m1(self, x): - print "m1(x=%s)" %`x` + def __init__(self, *args): + print "__init__, args =", args + def m1(self, x): + print "m1(x=%s)" %`x` print C x = C() print x x.m1(12) class D(C): - def __getattr__(self, name): - if name[:2] == '__': raise AttributeError, name - return "getattr:%s" % name + def __getattr__(self, name): + if name[:2] == '__': raise AttributeError, name + return "getattr:%s" % name x = D() print x.foo print x._foo |