code: def _median_based_precision(distances: np.ndarray) -> float:
      tmp = np.sqrt(distances)
      tmp = tmp - np.tril(tmp, -1)
      tmp = tmp.reshape(-1, 1)
  
      return 1 / np.median(tmp[tmp > 0])
  
file_path: dowhy/dowhy/gcm/independence_test/kernel_operation.py
imports: from typing import Optional
  import numpy
  from sklearn.kernel_approximation import Nystroem
  from sklearn.metrics import euclidean_distances
  from dowhy.gcm.util.general import shape_into_2d
label_desc: Use image node_id 6 for calling a global function with example usage: _median_based_precision(distances) and returns: unknown