Files @ b61824e61e68
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Location: kallithea/rhodecode/lib/vcs/utils/lazy.py - annotation

Marcin Kuzminski
Don't cache dulwich Repos, in pararell multithreaded evniroment dulwich pack file openers
can break badly. We need to create Repo() objects always for each call, even when it's
taken from cache.
Fixed issue with dulwich filedescriptor leak ref #573
class LazyProperty(object):
    """
    Decorator for easier creation of ``property`` from potentially expensive to
    calculate attribute of the class.

    Usage::

      class Foo(object):
          @LazyProperty
          def bar(self):
              print 'Calculating self._bar'
              return 42

    Taken from http://blog.pythonisito.com/2008/08/lazy-descriptors.html and
    used widely.
    """

    def __init__(self, func):
        self._func = func
        self.__module__ = func.__module__
        self.__name__ = func.__name__
        self.__doc__ = func.__doc__

    def __get__(self, obj, klass=None):
        if obj is None:
            return self
        result = obj.__dict__[self.__name__] = self._func(obj)
        return result