code: def cleandata(inputlist):
      
      output = []
      for e in inputlist:
          new = []
          for f in e:
              if f == "--":
                  new.append(None)
              else:
                  new.append(float(f))
          output.append(new)
      return output
docs: Helper function for parse.getdata.
      Remove empty variables, convert strings to float
  
      args:
          inputlist: list
              List of Variables
      Returns:
          ouput:
              Cleaned list