code: def __iadd__(self, other):
      self[:, :] = self + other
      return self
  
imports: from bisect import bisect_left
  import numpy
  from ._matrix import spmatrix
  from ._base import _spbase, sparray, issparse
  from ._index import IndexMixin, INT_TYPES, _broadcast_arrays
  from ._sputils import getdtype, isshape, isscalarlike, upcast_scalar, check_shape, check_reshape_kwargs
  from .None import _csparsetools
label_desc: Use image node_id 2 for calling the _lil_base obj's underlying member method code with example usage: obj.__iadd__(other) and returns: self