code: def _complex_real(real):
      return tf.complex(real, tf.zeros_like(real))
  
imports: import collections
  import tensorflow.compat.v2
  import tensorflow_probability
  from tensorflow_probability.python.internal import distribution_util
  from tensorflow_probability.python.internal import prefer_static
  from inference_gym.internal import data
  from inference_gym.targets import bayesian_model
  from inference_gym.targets import model
  from inference_gym.targets.ground_truth import stochastic_volatility_log_sp500
  from inference_gym.targets.ground_truth import stochastic_volatility_log_sp500_small
  from inference_gym.targets.ground_truth import stochastic_volatility_sp500
  from inference_gym.targets.ground_truth import stochastic_volatility_sp500_small
label_desc: Use image node_id 1 for calling a global function with example usage: _complex_real(real) and returns: tf