code: def find(self, key):
          "Exact matching (returns value)"
          index = self.follow_bytes(key, self.ROOT)
          if index is None:
              return -1
          if not self.has_value(index):
              return -1
          return self.value(indexf find(self, key):
          "Exact matching (returns value)"
          index = self.follow_bytes(key, self.ROOT)
          if index is None:
              return -1
          if not self.has_value(index):
              return -1
          return self.value(index)
docs: Exact matching (returns value)