Python recursively __getattribute__

[bruno.desthuilliers at gmail.com]

On 22 nov, 21:44, Roman Dolgiy <tost... at gmail.com> wrote:
>> http://stackoverflow.com/questions/4247036/python-recursively-getattr...
>
> I need to support a lot of legacy code, with THC4k's approach I'll
> have to modify project's existing code to use obj.attr1.val instead of
> obj.attr1 but this is not suitable.

You should probably re-read THC4k's answer. His code works just fine
AFAICT:

"""
# the proxy maps attribute access to another object
class GetattrProxy(object):
    def __init__(self, proxied, prefix=None):
        self.proxied = proxied
        self.prefix = prefix

    def __getattr__(self, key):
        attr = (key if self.prefix is None else self.prefix + '__' +
key)
        try:
            # if the proxied object has the attr return it
            return getattr(self.proxied, attr)
        except AttributeError:
            # else just return another proxy
            return GetattrProxy(self.proxied, attr)


# the thing you want to wrap
class Target(object):
    attr1__attr2__attr3 = 5
    attr2 = "attr2"


t = Target()
proxy = GetattrProxy(t)

print "proxy.attr1.attr2.attr3 : '%s'" % proxy.attr1.attr2.attr3
print "proxy.attr2 : '%s'" % proxy.attr2
"""