code: def _parse_spec(spec):
      """Parse an input spec of the form (shape, dtype) or shape into a jax.ShapeDtypeStruct."""
      spec = tuple(spec)
      if len(spec) == 2 and isinstance(spec[0], Iterable):
          return jax.ShapeDtypeStruct(tuple(spec[0]), spec[1])
      else:
          return jax.ShapeDtypeStruct(spec, jnp.float32)
  
imports: import collections
  import itertools
  import warnings
  from collections.abc import Iterable
  import jax
  import jax.numpy
  import numpy
  from jax import core, lax
  from jax.extend import linear_util
  from jax.interpreters import partial_eval
label_desc: Use image node_id 6 for calling a global function with example usage: _parse_spec(spec) and returns: jax, jax