code: def main():
      _main(sys.argv[1:])
  
file_path: petastorm/petastorm/tools/copy_dataset.py
imports: import argparse
  import logging
  import operator
  import sys
  from functools import reduce
  from pyspark.sql import SparkSession
  from petastorm.unischema import match_unischema_fields
  from petastorm.etl.dataset_metadata import materialize_dataset, get_schema_from_dataset_url
  from petastorm.tools.spark_session_cli import add_configure_spark_arguments, configure_spark
  from petastorm.fs_utils import FilesystemResolver
label_desc: Use image node_id 4 for calling a global function with example usage: main() without return types