How to setting learning rate in the model params??

[gaoliming123]

such as model build, where we can set the learning rate

model = mz.models.MatchPyramid()
model.params.update(preprocessor.context)
model.params['task'] = ranking_task
model.params['embedding_output_dim'] = 128
model.params['embedding_input_dim'] = preprocessor.context['embedding_input_dim']
model.params['embedding_trainable'] = True
model.params['num_blocks'] = 2
model.params['kernel_count'] = [8, 16]
model.params['kernel_size'] = [[5, 5], [3, 3]]
model.params['dpool_size'] = [3, 3]
model.params['optimizer'] = 'adam'
model.params['dropout_rate'] = 0.3
model.build()
model.compile()