if this is a short post, come back later. or next week. when i have more to write about it.
>>> for area in bpy.context.window.screen.areas: print(area.type)
...
INFO
PROPERTIES
OUTLINER
VIEW_3D
TEXT_EDITOR
CONSOLE
>>> bpy.context.window.screen.areas[3].regions[2].type
'TOOL_PROPS'
it is possible to query regions in that area (header, toolshelves..etc)
>>>bpy.context.area.regions[0].type
...'Header'
# good
bpy.context.area.type = 'GRAPH_EDITOR'
# bad, will crash blender until fixed
bpy.context = 'GRAPH_EDITOR'
