code: def build_loaders():
      """
      Utility function executed at runtime to load dynamic CLI options from the environment variable, DTALE_CLI_LOADERS.
      You either override one of the two default loader configurations, arctic or csv, or create a brand new
      configuration which can be referenced from the command line.
  
      """
      global LOADERS
  
      custom_loader_path = os.environ.get("DTALE_CLI_LOADERS")
      if custom_loader_path is not None:
          custom_loader_func = custom_module_loader()
          for full_filename in os.listdir(custom_loader_path):
              filename, file_extension = os.path.splitext(full_filename)
              if file_extension == ".py":
                  custom_loader = custom_loader_func(
                      filename, custom_loader_path
                  )
                  if hasattr(custom_loader, "LOADER_KEY") and hasattr(
                      custom_loader, "LOADER_PROPS"
                  ):
                      LOADERS[custom_loader.LOADER_KEY] = custom_loader
  
file_path: dtale/dtale/cli/loaders/__init__.py
imports: import os
  import platform
  from logging import getLogger
  import click
  from dtale.cli.loaders import arctic_loader, arcticdb_loader, csv_loader, excel_loader, json_loader, parquet_loader, r_loader, sqlite_loader
  from dtale.utils import make_list
label_desc: Use image node_id 7 for calling a global function with example usage: build_loaders() without return types