code: def get_scalar_arg_dtypes(self):
          
          dtypes = []
          for name, data in self._kernel_data.items():
              dtypes.extend(data.get_scalar_arg_dtypes())
          return dtypes
docs: Get the location and types of the input scalars.
  
          Returns:
              list: for every kernel input element either None if the data is a buffer or the numpy data type if
                  if is a scalar.