Export a copy of the current file to the OUTPUT folder; only the specified LAYERS are exported. The current file will be saved before exporting.

export-selected-layers.py

# =============================================================
# Copyright TEA DE SOUZA 2014. Free to use and
# modify, do not remove this notice.
# =============================================================
#
# Export a copy of the current file to the OUTPUT folder.
# Only the specified LAYERS are exported.
# The current file will be saved before exporting.
#
# =============================================================

LAYERS = [0,1,2,3,4,5,6,7,8,9]
OUTPUT = "/Volumes/Aka/uni-x/village/Assets/models/terrain/"

# =============================================================

import bpy

def export():
    showAllLayers()
    for k in bpy.context.scene.objects:
        k.select = not isExportable(k)
    bpy.ops.object.delete()
    path = OUTPUT+filename()
    if path==bpy.data.filepath:
        print("WARNING: cannot overwrite source file")
        print("WARNING: please change output directory")
    else:
        print("Saving to "+path)
        bpy.ops.wm.save_as_mainfile(filepath=path,copy=True,compress=True)

def isExportable(object):
    for i in LAYERS:
        if object.layers[i]: return True
    return False

def filename():
    p = bpy.data.filepath
    return p[p.rfind("/")+1:]

def showAllLayers():
    sel = []
    for i in range(0,20): sel.append(True)
    bpy.context.scene.layers = sel

# ===============================================================
# MAIN SECTION
# ===============================================================

print("EXPORT SELECTED LAYERS")
bpy.ops.wm.save_as_mainfile(compress=True)
export()
bpy.ops.wm.revert_mainfile()
print("EXPORT COMPLETE")
    
# EOF ===========================================================