code: def unstack(
      x: Union[tf.Tensor, tf.Variable],
      /,
      *,
      copy: Optional[bool] = None,
      axis: int = 0,
      keepdims: bool = False,
  ) -> List[tf.Tensor]:
      if x.shape == ():
          return [x]
      ret = tf.unstack(x, axis=axis)
      if keepdims:
          return [tf.expand_dims(r, axis) for r in ret]
      return ret
  
imports: import math
  from numbers import Number
  from typing import Union, Tuple, Optional, List, Sequence
  import numpy
  import tensorflow
  import ivy
  from ivy.func_wrapper import with_unsupported_dtypes
  from ivy.functional.ivy.manipulation import _calculate_out_shape
  from .None import backend_version
label_desc: Use image node_id 17 for calling a global function with example usage: unstack() and returns: ret, list, unknown