docs: def fasta_cmd_get_seqs(acc_list,
                   blast_db=None,
                   is_protein=None,
                   out_filename=None,
                   params={},
                   WorkingDir=tempfile.gettempdir(),
                   SuppressStderr=None,
                   SuppressStdout=None):
      """Retrieve sequences for list of accessions """
  
      if is_protein is None:
          params["-p"] = 'G'
      elif is_protein:
          params["-p"] = 'T'
      else:
          params["-p"] = 'F'
  
      if blast_db:
          params["-d"] = blast_db
  
      if out_filename:
          params["-o"] = out_filename
  
      # turn off duplicate accessions
      params["-a"] = "F"
  
      # create Psi-BLAST
      fasta_cmd = FastaCmd(params=params,
                         InputHandler='_input_as_string',
                         WorkingDir=WorkingDir,
                         SuppressStderr=SuppressStderr,
                         SuppressStdout=SuppressStdout)
  
      # return results
      return fasta_cmd("\"%s\"" % ','.join(acc_list))