How to return to the default view that you see when blender starts? I was wondering if anyone knew how to reset the viewing angle to what it was at the startup. I just want to reset it to that view, not reload startup file or load factory settings or anything. I want to have this viewpoint

but still have all the work that I did.
If you want to reset the default viewport view and not the camera view,run this in text editor :

import bpy


vm = ((0.41, -0.4017, 0.8188, 0.0),(0.912, 0.1936, -0.3617, 0.0),(-0.0133, 0.8959, 0.4458, 0.0),(0.0, 0.0, -14.9892, 1.0))

for area in bpy.context.screen.areas:
    if area.type == 'VIEW_3D':
        v3d = area.spaces[0].region_3d
        if v3d :
            v3d.view_matrix = vm
            v3d.view_perspective = 'PERSP'


if you are wondering where those values are from , i simply started the default scene and used
print(v3d.view_matrix) to get the default coordinates.