code: def is_gzipped_fastq(file_name):
      
      _, ext = os.path.splitext(file_name)
      return file_name.endswith(".fastq.gz") or file_name.endswith(".fq.gz")
docs: Determine whether indicated file appears to be a gzipped FASTQ.
  
      :param str file_name: Name/path of file to check as gzipped FASTQ.
      :return bool: Whether indicated file appears to be in gzipped FASTQ format.