code: def flatten_arrays(arrs):
      """
      flattens a list of arrays down to 1D
  
      :param arrs: ([np.ndarray]) arrays
      :return: (np.ndarray) 1D flattened array
      """
      return np.concatenate([arr.flat for arr in arrs])
  
file_path: stable-baselines/stable_baselines/common/math_util.py
imports: import numpy
  import scipy.signal
label_desc: Use image node_id 5 for calling a global function with example usage: flatten_arrays(arrs) and returns: np