code: def altair_vl_version(vl_convert=False):
      """
      Get Altair's preferred Vega-Lite version
  
      :param vl_convert: If True, return a version string compatible with vl_convert
          (e.g. v4_17 rather than 4.17.0)
      :return: str with Vega-Lite version
      """
      from altair import SCHEMA_VERSION
  
      if vl_convert:
          # Compute VlConvert's vl_version string (of the form 'v5_2')
          # from SCHEMA_VERSION (of the form 'v5.2.0')
          return "_".join(SCHEMA_VERSION.split(".")[:2])
      else:
          # Return full version without leading v
          return SCHEMA_VERSION.lstrip("v")
  
file_path: vegafusion/python/vegafusion/vegafusion/__init__.py
imports: from .runtime import runtime
  from .transformer import to_feather, get_inline_datasets_for_spec
  from .renderer import RowLimitError
  from .local_tz import set_local_tz, get_local_tz
  from .evaluation import transformed_data
  from .save import save_html, save_vega, save_png, save_svg
  from .None import renderer
  from .compilers import vegalite_compilers
  import altair
  from ._version import __version__
  from .utils import RendererTransformerEnabler
label_desc: Use image node_id 1 for calling a global function with example usage: altair_vl_version(vl_convert) and returns: str, SCHEMA_VERSION