code: def _get_edges(conn_mat):
      """Returns all edges."""
      starts, ends = conn_mat.nonzero()
      return [_get_edge(starts[i], ends[i]) for i in range(len(starts))]
  
file_path: dragonfly/dragonfly/nn/nn_visualise.py
imports: import functools
  import os
label_desc: Use image node_id 8 for calling a global function with example usage: _get_edges(conn_mat) and returns: unknown