code: def allclose(x, y, atol=None):
      if atol is not None:
          return x.shape == y.shape and np.allclose(x, y, atol=0.5)
      else:
          return x.shape == y.shape and np.allclose(x, y)
  
imports: from logging import warn
  import warnings
  import nibabel
  import numpy
  import numpy.testing
  from dipy.core.gradients import gradient_table
  from dipy.core.sphere import HemiSphere, unit_octahedron
  from dipy.data import get_fnames, get_sphere
  from dipy.direction import BootDirectionGetter, ClosestPeakDirectionGetter, DeterministicMaximumDirectionGetter, PeaksAndMetrics, ProbabilisticDirectionGetter, PTTDirectionGetter
  from dipy.reconst.csdeconv import ConstrainedSphericalDeconvModel
  from dipy.reconst.shm import descoteaux07_legacy_msg
  from dipy.tracking.local_tracking import LocalTracking, ParticleFilteringTracking
  from dipy.tracking.streamline import Streamlines
  from dipy.tracking.stopping_criterion import ActStoppingCriterion, BinaryStoppingCriterion, ThresholdStoppingCriterion, StreamlineStatus
  from dipy.tracking.utils import random_seeds_from_mask, seeds_from_mask
  from dipy.sims.voxel import single_tensor, multi_tensor
  from dipy.testing.decorators import set_random_number_generator
label_desc: Use image node_id 1 for calling a global function with example usage: allclose(x, y, atol) and returns: unknown, unknown