code: def test_exp_biases_extreme(temporal_graph):
      rw = TemporalRandomWalk(temporal_graph)
  
      large_times = [100000, 100001]
      biases = rw._exp_biases(large_times, t_0=0, decay=True)
      assert sum(biases) == pytest.approx(1)
  
      small_times = [0.000001, 0.000002]
      biases = rw._exp_biases(small_times, t_0=0, decay=True)
      assert sum(biases) == pytest.approx(1)
  
file_path: stellargraph/tests/data/test_temporal_random_walker.py
imports: import pandas
  import pytest
  import numpy
  import networkx
  from stellargraph.data.explorer import TemporalRandomWalk
  from stellargraph.core.graph import StellarGraph
label_desc: Use image node_id 5 for calling a global function with example usage: test_exp_biases_extreme(temporal_graph) without return types