test(pde): fix an import error in test_pde.py
@@ -5,7 +5,7 @@ matplotlib.use('Agg') # use a non-GUI backend, so plots are not shown during tes
from neurodiffeq import diff
from neurodiffeq.networks import FCNN
-from neurodiffeq.pde import DirichletBVP2D, IBVP1D, Condition,_network_output_2input
+from neurodiffeq.pde import DirichletBVP2D, IBVP1D, _network_output_2input
from neurodiffeq.pde import DirichletControlPoint, NeumannControlPoint, Point, CustomBoundaryCondition
from neurodiffeq.generators import PredefinedGenerator, Generator2D
from neurodiffeq.pde import solve2D, solve2D_system, Monitor2D, make_animation, set_default_dtype
