code: def test_histogram__insufficient_bin_edges(self):
      with self.assertRaisesRegex(
          RuntimeError,
          "Number of bin edges must be greater than or equal to 2",
      ):
          self._test_histogram([np.random.rand(111)], [1.0])
  
file_path: pytorch/caffe2/python/operator_test/histogram_test.py
imports: import unittest
  import caffe2.python.hypothesis_test_util
  import hypothesis.strategies
  import numpy
  from caffe2.python import core, workspace
  from hypothesis import given, settings
label_desc: Use image node_id 6 for calling the TestHistogram obj's underlying member method code with example usage: obj.test_histogram__insufficient_bin_edges() without return types