code: def test_basic_bincount(self):
      class SimpleOp(nn.Module):
          def forward(self, x, y):
              out1 = x.bincount()
              out2 = torch.bincount(x)
              out3 = x.bincount(weights=y)
              out4 = x.bincount(weights=y, minlength=2)
              return out1, out2, out3, out4
  
      self.checkExportImport(
          SimpleOp(),
          (
              torch.randint(0, 8, (5,), dtype=torch.int64),
              torch.linspace(0, 1, steps=5),
          ),
      )
  
imports: import unittest
  import torch
  import nni.nas.nn.pytorch.layers
  from .convert_mixin import ConvertMixin, ConvertWithShapeMixin
label_desc: Use image node_id 19 for calling the TestConvert obj's underlying member method code with example usage: obj.test_basic_bincount() and returns: out1,  out2,  out3,  out4