batch_import_obj.py

####################
# Batch Import OBJ #
####################


import bpy


def f(**kwargs):
    print(kwargs)


def main(directory, obj_import_options):
    from glob import glob

    obj_files = glob(directory + "/**/*.obj", recursive=True)
    num_files = len(obj_files)

    wm = bpy.context.window_manager
    wm.progress_begin(0, num_files)
    for i,path in enumerate(obj_files, 1):
        wm.progress_update(i-1)
        print(f"[{ str(i).rjust(len(str(num_files))) }/{num_files}] Import {path} ...")
        bpy.ops.wm.obj_import(filepath=path)
        #f(filepath=path, **obj_import_options)
    wm.progress_end()


class BatchImportOBJ(bpy.types.Operator):
    bl_idname = "wm.batch_import_obj"
    bl_label = "Batch Import OBJ"

    directory: bpy.props.StringProperty(
        name="Directory Path",
        default="",
        maxlen=1024,
        subtype='FILE_PATH',
        description="",
    )
    filter_folder: bpy.props.BoolProperty(
        default=True,
        options={'HIDDEN'},
    )

    # bpy.ops.wm.obj_import() options
    clamp_size: bpy.props.FloatProperty(
            name="Clamp Bounding Box",
            min=0.0,
            max=1000.0,
            default=0.0,
    )
    forward_axis: bpy.props.EnumProperty(
            name="Forward Axis",
            items=(
                ("X", "X", ""),
                ("Y", "Y", ""),
                ("Z", "Z", ""),
                ("NEGATIVE_X", "-X", ""),
                ("NEGATIVE_Y", "-Y", ""),
                ("NEGATIVE_Z", "-Z", ""),
            ),
            default="NEGATIVE_Z",
    )
    up_axis: bpy.props.EnumProperty(
            name="Up Axis",
            items=(
                ("X", "X", ""),
                ("Y", "Y", ""),
                ("Z", "Z", ""),
                ("NEGATIVE_X", "-X", ""),
                ("NEGATIVE_Y", "-Y", ""),
                ("NEGATIVE_Z", "-Z", ""),
            ),
            default="Y",
    )
    import_vertex_groups: bpy.props.BoolProperty(
            name="Vertex Groups",
            default=False,
    )
    validate_meshes: bpy.props.BoolProperty(
            name="Validate Meshes",
            default=False,
    )

    @classmethod
    def poll(cls, context):
        return bpy.ops.wm.obj_import.poll()

    def invoke(self, context, event):
        # ファイルエクスプローラーを表示する
        # 参考URL: https://docs.blender.org/api/current/bpy.types.WindowManager.html#bpy.types.WindowManager.fileselect_add
        context.window_manager.fileselect_add(self)
        return {'RUNNING_MODAL'}

    def execute(self, context):
        obj_import_options = {
                "clamp_size": self.clamp_size,
                "forward_axis": self.forward_axis,
                "up_axis": self.up_axis,
                "import_vertex_groups": self.import_vertex_groups,
                "validate_meshes": self.validate_meshes,
        }
        main(self.directory, obj_import_options)
        return {'FINISHED'}


def register():
    bpy.utils.register_class(BatchImportOBJ)


if __name__ == "__main__":
    register()
    bpy.ops.wm.batch_import_obj('INVOKE_DEFAULT')