code: def test_point_at(self, device, dtype):
      p0 = torch.tensor([0.0, 0.0], device=device, dtype=dtype)
      p1 = torch.tensor([1.0, 0.0], device=device, dtype=dtype)
      l1 = ParametrizedLine.through(p0, p1)
      self.assert_close(
          l1.point_at(0.0),
          torch.tensor([0.0, 0.0], device=device, dtype=dtype),
      )
      self.assert_close(
          l1.point_at(0.5),
          torch.tensor([0.5, 0.0], device=device, dtype=dtype),
      )
      self.assert_close(
          l1.point_at(1.0),
          torch.tensor([1.0, 0.0], device=device, dtype=dtype),
      )
  
imports: import pytest
  import torch
  from torch.autograd import gradcheck
  from kornia.geometry.line import ParametrizedLine, fit_line
  from kornia.geometry.plane import Hyperplane
  from kornia.testing import BaseTester, assert_close
label_desc: Use image node_id 3 for calling the TestParametrizedLine obj's underlying member method code with example usage: obj.test_point_at(device, dtype) without return types