def _compute_checksum(self, stream, size=None, chunk_size=None,
                          progress_callback=None, **kwargs):
        """Get helper method to compute checksum from a stream.

        Naive implementation that can be overwritten by subclasses in order to
        provide more efficient implementation.
        """
        if progress_callback and size:
            progress_callback = partial(progress_callback, size)
        else:
            progress_callback = None

        try:
            algo, m = self._init_hash()
            return compute_checksum(
                stream, algo, m,
                chunk_size=chunk_size,
                progress_callback=progress_callback,
                **kwargs
            )
        except Exception as e:
            raise StorageError(
                'Could not compute checksum of file: {0}'.format(e))
def _compute_checksum ( self , stream , size = None , chunk_size = None , progress_callback = None , ** kwargs ) : if progress_callback and size : progress_callback = partial ( progress_callback , size ) else : progress_callback = None try : algo , m = self . _init_hash ( ) return compute_checksum ( stream , algo , m , chunk_size = chunk_size , progress_callback = progress_callback , ** kwargs ) except Exception as e : raise StorageError ( 'Could not compute checksum of file: {0}' . format ( e ) )
Get helper method to compute checksum from a stream.

        Naive implementation that can be overwritten by subclasses in order to
        provide more efficient implementation.