code: def main(args):
      aishell1_dir = args.aishell1_dir
      aishell1_md_dir = args.aishell1_md_dir
      wham_dir = args.wham_dir
      wham_md_dir = args.wham_md_dir
      n_src = args.n_src
      # Create aishell1mix metadata directory
      md_dir = args.metadata_outdir
      if md_dir is None:
          root = os.path.dirname(aishell1_dir)
          md_dir = os.path.join(root, f"aishell1mix/metadata")
      os.makedirs(md_dir, exist_ok=True)
      create_aishell1mix_metadata(
          aishell1_dir,
          aishell1_md_dir,
          wham_dir,
          wham_md_dir,
          md_dir,
          n_src,
      )
  
imports: import argparse
  import os
  import random
  import warnings
  import numpy
  import pandas
  import pyloudnorm
  import soundfile
  from tqdm import tqdm
label_desc: Use image node_id 1 for calling a global function with example usage: main(args) without return types