fix bug

Author: AlexYangLi

models/keras_base_model.py

@@ -28,7 +28,7 @@ def __init__(self, config):
  super(KerasBaseModel, self).__init__()
  self.config = config
  self.level = self.config.input_level
- self.max_len = self.config.max_len[self.config.level]
+ self.max_len = self.config.max_len[self.config.input_level]
  self.word_embeddings = config.word_embeddings
  self.n_class = config.n_class