code: def test_datetime(self):
      begin = np.datetime64("2000-01-01", "D")
      offsets = np.array([0, 0, 1, 1, 2, 3, 5, 10, 20])
      bins = np.array([0, 2, 7, 20])
      dates = begin + offsets
      date_bins = begin + bins
  
      td = np.dtype("timedelta64[D]")
  
      # Results should be the same for integer offsets or datetime values.
      # For now, only explicit bins are supported, since linspace does not
      # work on datetimes or timedeltas
      d_count, d_edge = histogram(dates, bins=date_bins)
      t_count, t_edge = histogram(
          offsets.astype(td), bins=bins.astype(td)
      )
      i_count, i_edge = histogram(offsets, bins=bins)
  
      assert_equal(d_count, i_count)
      assert_equal(t_count, i_count)
  
      assert_equal((d_edge - begin).astype(int), i_edge)
      assert_equal(t_edge.astype(int), i_edge)
  
      assert_equal(d_edge.dtype, dates.dtype)
      assert_equal(t_edge.dtype, td)
  
imports: import numpy
  from numpy.lib.histograms import histogram, histogramdd, histogram_bin_edges
  from numpy.testing import assert_, assert_equal, assert_array_equal, assert_almost_equal, assert_array_almost_equal, assert_raises, assert_allclose, assert_array_max_ulp, assert_raises_regex, suppress_warnings
  from numpy.testing._private.utils import requires_memory
  import pytest
label_desc: Use image node_id 24 for calling the TestHistogram obj's underlying member method code with example usage: obj.test_datetime() without return types