make visualize import optional and

DCO Remediation Commit for Thijs Baaijen <[email protected]>

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Signed-off-by: Thijs Baaijen <[email protected]>

Author: Thijss

src/power_grid_model_ds/__init__.py

@@ -5,6 +5,9 @@
 from power_grid_model_ds._core.load_flow import PowerGridModelInterface
 from power_grid_model_ds._core.model.graphs.container import GraphContainer
 from power_grid_model_ds._core.model.grids.base import Grid
-from power_grid_model_ds._core.visualizer.main import visualize
+try:
+    from power_grid_model_ds._core.visualizer.main import visualize
+except ImportError:
+    pass
 
 __all__ = ["Grid", "GraphContainer", "PowerGridModelInterface", "visualize"]