Reply to thread

Message

[QUOTE="George Sakkis, post: 1948894"]
Or if you don't mind a more verbose API, you may use a decorator
instead:

# comment out if version<2.5
from functools import wraps

def do_forall(attr):
    def deco(func):
        f_name = func.__name__
        @wraps(func) # comment out if version<2.5
        def wrapper(self,*args,**kwds):
            for b in getattr(self,attr):
                getattr(b,f_name)(*args,**kwds)
        return wrapper
    return deco

#====== Example =================================

class Foo(object):
    def flush(self): print "Foo.flush"
    def draw(self, x, y): print "Foo.draw(%s,%s)" % (x,y)

class Bar(object):
    def flush(self): print "Bar.flush"
    def draw(self, x, y): print "Bar.draw(%s,%s)" % (x,y)

forall_backends = do_forall('backends')

class MultiBackend(object):
    """Renders to multiple backends"""

def __init__(self, backends):
        self.backends = backends

@forall_backends
    def flush(self):
        'Flush all backends'

@forall_backends
    def draw(self, x, y):
        'Draw point (x,y) on all backends'

m = MultiBackend([Foo(),Bar()])
m.flush()
m.draw(1,2)

#======================================

HTH,
George
[/QUOTE]

Verification