docstr: Return the conjugate transpose.
code: def conjtransp(self):
      """Return the conjugate transpose."""
      M, N = self.shape
      new = self._dok_container((N, M), dtype=self.dtype)
      new._dict.update(
          (
              ((right, left), np.conj(val))
              for (left, right), val in self.items()
          )
      )
      return new
  
imports: import itertools
  import numpy
  from ._matrix import spmatrix
  from ._base import _spbase, sparray, issparse
  from ._index import IndexMixin
  from ._sputils import isdense, getdtype, isshape, isintlike, isscalarlike, upcast, upcast_scalar, check_shape
label_desc: Use image node_id 39 for calling the _dok_base obj's underlying member method code with example usage: obj.conjtransp() and returns: new