Add support for 2D files

scripts/dxf_to_csv.py

@@ -79,6 +79,12 @@ def convert(dxf_name, layer_name):
 
     # Add to dataframe
     points = pd.DataFrame(data)
+
+    # Check if there are z coordinates
+    if 'z' not in points.columns:
+        points['z'] = np.nan
+
+    # Reorder columns
     points = points[['layer', 'type', 'id', 'x', 'y', 'z']]
 
     # Export points