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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get(self, requirement):
 """ Get a distribution archive from any of the available caches. :param requirement: A :class:`.Requirement` object. :returns: The absolute pathname of a local file or :data:`None` when the distribution archive is missing from all available caches. """

        filename = self.generate_filename(requirement)
        for backend in list(self.backends):
            try:
                pathname = backend.get(filename)
                if pathname is not None:
                    return pathname
            except CacheBackendDisabledError as e:
                logger.debug("Disabling %s because it requires configuration: %s", backend, e)
                self.backends.remove(backend)
            except Exception as e:
                logger.exception("Disabling %s because it failed: %s", backend, e)
                self.backends.remove(backend)