code: def get(self, path):
          
          assert isinstance(path, mitogen.core.UnicodeType)
          self._lock.acquire()
          try:
              if path in self._cache:
                  return self._cache[path]
              latch = mitogen.core.Latch()
              waiters = self._waiters.setdefault(path, [])
              waiters.append(lambda: latch.put(None))
          finally:
              self._lock.release()
  
          LOG.debug('%r.get(%r) waiting for uncached file to arrive', self, path)
          latch.get()
          LOG.debug('%r.get(%r) -> %r', self, path, self._cache[path])
          return self._cache[path]
docs: Fetch a file from the cache.