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# scipy.sparse.bsr_matrix.tobsr

`bsr_matrix.``tobsr`(blocksize=None, copy=False)

  Convert this matrix into Block Sparse Row Format.

  With copy=False, the data/indices may be shared between this matrix and the resultant bsr_matrix.

  If blocksize=(R, C) is provided, it will be used for determining block size of the bsr_matrix.