On 01.11.2012, at 22:38, Andrea Crotti wrote: > Seeing the wonderful "lazy val" in Scala I thought that I should try to get > the following also in Python. > The problem is that I often have this pattern in my code: > > class Sample: > def __init__(self): > self._var = None > > @property > def var(self): > if self._var is None: > self._var = long_computation() > else: > return self._var > > > which is quite useful when you have some expensive attribute to compute that > is not going to change. > I was trying to generalize it in a @lazy_property but my attempts so far > failed, any help on how I could do that?
There is a ready made and well tested lazy decorator at http://pypi.python.org/pypi/lazy Stefan -- Stefan H. Holek ste...@epy.co.at -- http://mail.python.org/mailman/listinfo/python-list
