code: def to_utf8(datas):
      
      res = datas
      if isinstance(datas, dict):
          res = {}
          for key, value in datas.items():
              key = to_utf8(key)
              value = to_utf8(value)
              res[key] = value
  
      elif isinstance(datas, (list, tuple)):
          res = []
          for data in datas:
              res.append(to_utf8(data))
  
      elif isinstance(datas, unicode):
          res = datas.encode('utf-8')
  
      return res
docs: Force utf8 string entries in the given datas