code: def sanitize_dict(d, reverse=False):
      
      data = {}
  
      if isinstance(d, list):
          list_data = []
          for item in d:
              list_data.append(sanitize_dict(item, reverse=reverse))
          return list_data
      elif not isinstance(d, dict):
          return d
  
      for k, v in d.items():
          if isinstance(v, dict):
              v = sanitize_dict(v, reverse=reverse)
          elif isinstance(v, list):
              list_data = []
              for item in v:
                  list_data.append(item)
              v = sanitize_dict(list_data, reverse=reverse)
  
          if reverse:
              data[
                  k.replace(MONGO_COMMAND_KEY_PERIOD_SIGN_REPLACEMENT, '.').replace(
                      MONGO_COMMAND_KEY_DOLLAR_SIGN_REPLACEMENT, '$'
                  )
              ] = v
          else:
              data[
                  k.replace('.', MONGO_COMMAND_KEY_PERIOD_SIGN_REPLACEMENT).replace(
                      '$', MONGO_COMMAND_KEY_DOLLAR_SIGN_REPLACEMENT
                  )
              ] = v
      return data
docs: ValidationError: ValidationError (ProfilingRequest:None) (Invalid
      dictionary key name - keys may not contain "." or "$" characters 1.Invalid
      dictionary key name - keys may not contain "." or "$" characters 2.Invalid
      dictionary key name - keys may not contain "." or "$" characters:
      ['queries'])