multi_object_exporter.py

import bpy
import os

from bpy_extras.io_utils import ExportHelper
from bpy.props import StringProperty, BoolProperty, EnumProperty, IntProperty
from bpy.types import Operator


class ExportSelectedAsObj(Operator, ExportHelper):
    """This appears in the tooltip of the operator and in the generated docs"""
    bl_idname = "export.selected_as_obj_files"  # important since its how bpy.ops.import_test.some_data is constructed
    bl_label = "Export Selected Objects as obj"

    global_scale = IntProperty(default=1)
    use_filter_folder = True
    filename_ext = "."

    # axis_forward='-Z'
    # axis_up='Y'

    check_existing = BoolProperty(default=True)
    use_selection = BoolProperty(default=True)
    use_animation = BoolProperty(default=False)
    use_mesh_modifiers = BoolProperty(default=True)
    use_edges = BoolProperty(default=True)
    use_smooth_groups = BoolProperty(default=False)
    use_smooth_groups_bitflags = BoolProperty(default=False)
    use_normals = BoolProperty(default=True)
    use_uvs = BoolProperty(default=True)
    use_materials = BoolProperty(default=True)
    use_triangles = BoolProperty(default=False)
    use_nurbs = BoolProperty(default=False)
    use_vertex_groups = BoolProperty(default=False)
    use_blen_objects = BoolProperty(default=True)
    group_by_object = BoolProperty(default=False)
    group_by_material = BoolProperty(default=False)
    keep_vertex_order = BoolProperty(default=False)

    def write_some_data(self, context, folder):
        selected = bpy.context.selected_objects.copy()
        bpy.ops.object.select_all(action='DESELECT')

        inherrited = [
            'check_existing',
            'use_selection',
            'use_animation',
            'use_mesh_modifiers',
            'use_edges',
            'use_smooth_groups',
            'use_smooth_groups_bitflags',
            'use_normals',
            'use_uvs',
            'use_materials',
            'use_triangles',
            'use_nurbs',
            'use_vertex_groups',
            'use_blen_objects',
            'group_by_object',
            'group_by_material',
            'keep_vertex_order']

        settings = {}
        for k in inherrited:
            settings[k] = getattr(self, k)

        for obj in selected:
            name = obj.name.replace('.', '_')
            obj.select = True
            fullpath = os.path.join(folder, name + '.obj')
            settings['filepath'] = fullpath
            bpy.ops.export_scene.obj(**settings)
            obj.select = False

        return {'FINISHED'}

    def execute(self, context):
        print(self.filepath)
        sliced = os.path.dirname(self.filepath)
        if os.path.isdir(sliced):
            if os.path.exists(sliced):
                self.filepath = sliced
        else:
            self.report({'WARNING'}, 'Not a valid path')
            return {'FINISHED'}

        return self.write_some_data(context, self.filepath)


# Only needed if you want to add into a dynamic menu
def menu_func_import(self, context):
    self.layout.operator(ExportSelectedAsObj.bl_idname, text="Export selected as .Objs")


def register():
    bpy.utils.register_class(ExportSelectedAsObj)
    bpy.types.INFO_MT_file_export.append(menu_func_import)


def unregister():
    bpy.utils.unregister_class(ExportSelectedAsObj)
    bpy.types.INFO_MT_file_export.remove(menu_func_import)


if __name__ == "__main__":
    register()