code: def gen_feature_input_data_free(
      num_sample, sample_len, sample_feature_dim
  ):
      return np.zeros(
          [num_sample, sample_len * sample_feature_dim],
          dtype=np.float32,
      )
  
file_path: BigDL/python/chronos/src/bigdl/chronos/simulator/doppelganger/util.py
imports: from .output import OutputType, Output, Normalization
  import numpy
label_desc: Use image node_id 6 for calling a global function with example usage: gen_feature_input_data_free(num_sample, sample_len, sample_feature_dim) and returns: np