code: def todia(self, copy=False):
      if copy:
          return self.copy()
      else:
          return self
  
imports: import numpy
  from ._matrix import spmatrix
  from ._base import issparse, _formats, _spbase, sparray
  from ._data import _data_matrix
  from ._sputils import isshape, upcast_char, getdtype, get_sum_dtype, validateaxis, check_shape
  from ._sparsetools import dia_matvec
label_desc: Use image node_id 11 for calling the _dia_base obj's underlying member method code with example usage: obj.todia(copy) and returns: self, self