On 22 nov, 21:44, Roman Dolgiy <tost...@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
"""
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