In [1]: from pyscipopt import Model

In [2]: model = Model()

In [3]: x = model.addMatrixVar(3)

In [4]: x
Out[4]: MatrixVariable([x1, x2, x3], dtype=object)

In [5]: res = x @ x

In [6]: res
Out[6]:
MatrixVariable(Expr({Term(x1, x1): 1.0, Term(x2, x2): 1.0, Term(x3, x3): 1.0}),
               dtype=object)

In [7]: type(res)
Out[7]: pyscipopt.scip.MatrixVariable

In [8]: res.vtype()
---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
Cell In[8], line 1
----> 1 res.vtype()

File src/pyscipopt/scip.pxi:1821, in pyscipopt.scip.MatrixVariable.vtype()

AttributeError: 'pyscipopt.scip.Expr' object has no attribute 'vtype'