code: def main(argv=()):
      with errors.clean_commandline_error_exit():
          if len(argv) > 1:
              errors.log_and_raise(
                  "Command line parsing failure: call_variants does not accept "
                  "positional arguments but some are present on the command line: "
                  '"{}".'.format(str(argv)),
                  errors.CommandLineError,
              )
          del argv  # Unused.
          proto_utils.uses_fast_cpp_protos_or_die()
  
          logging_level.set_from_flag()
  
          if FLAGS.use_tpu:
              primary = dv_utils.resolve_master(
                  FLAGS.primary,
                  FLAGS.tpu_name,
                  FLAGS.tpu_zone,
                  FLAGS.gcp_project,
              )
          else:
              primary = ""
  
          model = modeling.get_model(FLAGS.model_name)
          call_variants(
              examples_filename=FLAGS.examples,
              checkpoint_path=FLAGS.checkpoint,
              model=model,
              execution_hardware=FLAGS.execution_hardware,
              output_file=FLAGS.outfile,
              max_batches=FLAGS.max_batches,
              batch_size=FLAGS.batch_size,
              primary=primary,
              use_tpu=FLAGS.use_tpu,
          )
  
imports: import os
  import time
  from absl import flags
  from absl import logging
  import numpy
  import tensorflow
  from tensorflow import estimator
  from deepvariant import data_providers
  from deepvariant import dv_utils
  from deepvariant import logging_level
  from deepvariant import modeling
  from deepvariant.protos import deepvariant_pb2
  from google.protobuf import text_format
  from third_party.nucleus.io import sharded_file_utils
  from third_party.nucleus.io import tfrecord
  from third_party.nucleus.protos import variants_pb2
  from third_party.nucleus.util import errors
  from third_party.nucleus.util import proto_utils
  from third_party.nucleus.util import variant_utils
label_desc: Use image node_id 6 for calling a global function with example usage: main(argv) without return types