[BUG] [python] Cannot build objective `x + x*x`

[mtanneau]

Describe the bug

Forming a quadratic expression starting with a unitary variable term errors in the python API.

Steps/Code to reproduce bug

from cuopt.linear_programming.problem import Problem, CONTINUOUS, MINIMIZE

problem = Problem("qp")

x = problem.addVariable(lb=0.0, vtype=CONTINUOUS, name="x")

problem.setObjective(x + x*x, sense=MINIMIZE)  # errors

produces the following output:

Cannot add type QuadraticExpression to variable

Expected behavior

I expected the problem to be formed as expected

Environment details (please complete the following information):

• Environment location: DGX Spark
• Method of cuOpt install: via pip in a python virtual environment, using cuOpt v26.02

Additional context

Probably linked to #926 and how unitary variable terms are handled in conjunction with linear/quadratic expressions.

[chris-maes]

Thanks. Fixed in PR #936

[chris-maes]

PR #936 merged. Closing as fixed.