code: def format_keyword(keyword):
      
      import re
      result = ''
      if keyword:
          result = re.sub(r"\W", "", keyword)
          result = re.sub("_", "", result)
      return result
docs: Removing special character from a keyword. Analysis Services must have
      this kind of keywords. E.g. if assay name from the Instrument is
      'HIV-1 2.0', an AS must be created on Bika with the keyword 'HIV120'