Python: documentation about overriding context members.

doc/python_api/examples/bpy.ops.3.py

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+"""
+It is also possible to run an operator in a particular part of the user
+interface. For this we need to pass the window, screen, area and sometimes
+a region.
+"""
+
+# maximize 3d view in all windows
+import bpy
+
+for window in bpy.context.window_manager.windows:
+    screen = window.screen
+    
+    for area in screen.areas:
+        if area.type == 'VIEW_3D':
+            override = {'window': window, 'screen': screen, 'area': area}
+            bpy.ops.screen.screen_full_area(override)
+            break
+