docs: def just_load_srno(srno, prm_filename=None):
      """Simply load an dataset based on serial number (srno).
  
      This convenience function reads a dataset based on a serial number. This
      serial number (srno) must then be defined in your database. It is mainly
      used to check that things are set up correctly.
  
      Args:
          prm_filename: name of parameter file (optional).
          srno (int): serial number
  
      Example:
          >>> srno = 918
          >>> just_load_srno(srno)
          srno: 918
          read prms
          ....
  
          """
      from cellpy import dbreader, filefinder
      print("just_load_srno: srno: %i" % srno)
  
      # ------------reading parameters--------------------------------------------
      # print "just_load_srno: read prms"
      # prm = prmreader.read(prm_filename)
      #
      # print prm
  
      print("just_load_srno: making class and setting prms")
      d = CellpyData()
  
      # ------------reading db----------------------------------------------------
      print()
      print("just_load_srno: starting to load reader")
      # reader = dbreader.reader(prm_filename)
      reader = dbreader.Reader()
      print("------ok------")
  
      run_name = reader.get_cell_name(srno)
      print("just_load_srno: run_name:")
      print(run_name)
  
      m = reader.get_mass(srno)
      print("just_load_srno: mass: %f" % m)
      print()
  
      # ------------loadcell------------------------------------------------------
      print("just_load_srno: getting file_names")
      raw_files, cellpy_file = filefinder.search_for_files(run_name)
      print("raw_files:", raw_files)
      print("cellpy_file:", cellpy_file)
  
      print("just_load_srno: running loadcell")
      d.loadcell(raw_files, cellpy_file, mass=m)
      print("------ok------")
  
      # ------------do stuff------------------------------------------------------
      print("just_load_srno: getting step_numbers for charge")
      v = d.get_step_numbers("charge")
      print(v)
  
      print()
      print("just_load_srno: finding C-rates")
      d.find_C_rates(v, silent=False)
  
      print()
      print("just_load_srno: OK")
      return True