custom_code.py

import modules.scripts as scripts
import gradio as gr

from modules.processing import Processed
from modules.shared import opts, cmd_opts, state

class Script(scripts.Script):

    def title(self):
        return "Custom code"


    def show(self, is_img2img):
        return cmd_opts.allow_code

    def ui(self, is_img2img):
        code = gr.Textbox(label="Python code", visible=False, lines=1)

        return [code]


    def run(self, p, code):
        assert cmd_opts.allow_code, '--allow-code option must be enabled'

        display_result_data = [[], -1, ""]

        def display(imgs, s=display_result_data[1], i=display_result_data[2]):
            display_result_data[0] = imgs
            display_result_data[1] = s
            display_result_data[2] = i

        from types import ModuleType
        compiled = compile(code, '', 'exec')
        module = ModuleType("testmodule")
        module.__dict__.update(globals())
        module.p = p
        module.display = display
        exec(compiled, module.__dict__)

        return Processed(p, *display_result_data)