class_docstr: Rotation in 3 dimensions.
class_docstr_tok: ["Rotation","in","3","dimensions","."]
docstr: Number of rotations contained in this object.
docstr_tok: ["Number","of","rotations","contained","in","this","object","."]
code: def __len__(self):
      """Number of rotations contained in this object."""
      if self.single:
          raise TypeError("Single rotation has no len().")
      else:
          return self.quat.shape[0]
  
imports: from __future__ import annotations
  import functools
  import re
  import typing
  import scipy.spatial.transform
  import jax
  import jax.numpy
  from jax._src.numpy.util import _wraps
label_desc: Use image node_id 10 for calling the Rotation obj's underlying member method code with example usage: obj.__len__() and returns: self