code: def _gdal_typename(dt):
      try:
          return typename_fwd[dtype_rev[dt]]
      except KeyError:
          return typename_fwd[dtype_rev[dt().dtype.name]]
  
file_path: rasterio/rasterio/dtypes.py
imports: import numpy
  from rasterio.env import GDALVersion
label_desc: Use image node_id 3 for calling a global function with example usage: _gdal_typename(dt) and returns: typename_fwd, typename_fwd