Repository: stable-diffusion-webui
Issue: [Bug]: on a Mac when loading extensions the sidecar ._mycode.py file will be loaded causing a ValueError: source code string cannot contain null bytes error
Labels: bug-report,platform:mac

### Is there an existing issue for this?

- [X] I have searched the existing issues and checked the recent builds/commits

### What happened?

The extension I was developing kept failing to load with ValueError: source code string cannot contain null bytes 
after much testing I determined the problem was a hidden side car file 

user@xxx scripts % ls -ltra
total 1024
drwxrwxrwx  1 xxx  staff  131072 Jun 29 21:30 .
drwxrwxrwx  1 xxx  staff  131072 Jul  6 14:41 ..
-rwxrwxrwx  1 xxx  staff    4096 Jul  6 14:42 ._alpha.py
-rwxrwxrwx@ 1 xxx  staff      10 Jul  6 14:45 alpha.py

short term fix,  delete files before running webui.sh
long term fix,  can you exclude loading  .* hidden files in the module load code



### Steps to reproduce the problem

1. Go to .... extensions/xxx/scripts. , create   alpha.py on a Mac using an editor that creates sidecar files (brackets,xcode..)
2. run webui.sh
3. ...


### What should have happened?

it would be nice if .xxxxxx.py was ignored and not loaded as python code


### Version or Commit where the problem happens

394ffa7b0a7fff3ec484bcd084e673a8b301ccc8

### What Python version are you running on ?

Python 3.9.x (below, no recommended)

### What platforms do you use to access the UI ?

MacOS

### What device are you running WebUI on?

CPU

### Cross attention optimization

Automatic

### What browsers do you use to access the UI ?

Apple Safari

### Command Line Arguments

```Shell
none
```


### List of extensions

building my own

### Console logs

```Shell
################################################################
Launching launch.py...
################################################################
Python 3.9.6 (default, May  7 2023, 23:32:44) 
[Clang 14.0.3 (clang-1403.0.22.14.1)]
Version: v1.4.0
Commit hash: 394ffa7b0a7fff3ec484bcd084e673a8b301ccc8
Installing requirements
Neal2 install.py

Launching Web UI with arguments: --update-all-extensions --skip-torch-cuda-test --upcast-sampling --no-half-vae --use-cpu interrogate
No module 'xformers'. Proceeding without it.
Warning: caught exception 'Torch not compiled with CUDA enabled', memory monitor disabled
*** Error loading script: ._gadzoinks.py
    Traceback (most recent call last):
      File "/Volumes/ExtremePro/stable-diffusion-webui/modules/scripts.py", line 274, in load_scripts
        script_module = script_loading.load_module(scriptfile.path)
      File "/Volumes/ExtremePro/stable-diffusion-webui/modules/script_loading.py", line 10, in load_module
        module_spec.loader.exec_module(module)
      File "<frozen importlib._bootstrap_external>", line 846, in exec_module
      File "<frozen importlib._bootstrap_external>", line 983, in get_code
      File "<frozen importlib._bootstrap_external>", line 913, in source_to_code
      File "<frozen importlib._bootstrap>", line 228, in _call_with_frames_removed
    ValueError: source code string cannot contain null bytes
```


### Additional information

_No response_