class_docstr: Reader class for SEVIRI L2 products in GRIB format.
docstr: Read the global attributes and prepare for dataset reading.
docstr_tok: ["Read","the","global","attributes","and","prepare","for","dataset","reading","."]
code: def __init__(self, filename, filename_info, filetype_info):
      """Read the global attributes and prepare for dataset reading."""
      super().__init__(filename, filename_info, filetype_info)
      # Turn on support for multiple fields in single GRIB messages (required for SEVIRI L2 files)
      ec.codes_grib_multi_support_on()
  
imports: import logging
  from datetime import timedelta
  import dask.array
  import numpy
  import xarray
  from satpy.readers._geos_area import get_area_definition, get_geos_area_naming
  from satpy.readers.eum_base import get_service_mode
  from satpy.readers.file_handlers import BaseFileHandler
  from satpy.readers.seviri_base import PLATFORM_DICT, REPEAT_CYCLE_DURATION, calculate_area_extent
  from satpy.utils import get_legacy_chunk_size
label_desc: Use image node_id 1 to create a new SeviriL2GribFileHandler object from inherited base classes: BaseFileHandler with example: obj = SeviriL2GribFileHandler(filename, filename_info, filetype_info)