AttributeError: module 'h11' has no attribute 'Event'

`

Already up to date. venv "C:\StableDiffusion\stable-diffusion-webui\venv\Scripts\Python.exe" Python 3.8.0 (tags/v3.8.0:fa919fd, Oct 14 2019, 19:37:50) [MSC v.1916 64 bit (AMD64)] Commit hash: 828438b4a190759807f9054932cae3a8b880ddf1 Installing requirements for Web UI Launching Web UI with arguments: Traceback (most recent call last): File "launch.py", line 251, in <module> start() File "launch.py", line 242, in start import webui File "C:\StableDiffusion\stable-diffusion-webui\webui.py", line 13, in <module> from modules import devices, sd_samplers, upscaler, extensions, localization File "C:\StableDiffusion\stable-diffusion-webui\modules\sd_samplers.py", line 11, in <module> from modules import prompt_parser, devices, processing, images File "C:\StableDiffusion\stable-diffusion-webui\modules\processing.py", line 15, in <module> import modules.sd_hijack File "C:\StableDiffusion\stable-diffusion-webui\modules\sd_hijack.py", line 10, in <module> import modules.textual_inversion.textual_inversion File "C:\StableDiffusion\stable-diffusion-webui\modules\textual_inversion\textual_inversion.py", line 13, in <module> from modules import shared, devices, sd_hijack, processing, sd_models, images, sd_samplers File "C:\StableDiffusion\stable-diffusion-webui\modules\shared.py", line 8, in <module> import gradio as gr File "C:\StableDiffusion\stable-diffusion-webui\venv\lib\site-packages\gradio\__init__.py", line 3, in <module> import gradio.components as components File "C:\StableDiffusion\stable-diffusion-webui\venv\lib\site-packages\gradio\components.py", line 31, in <module> from gradio import media_data, processing_utils, utils File "C:\StableDiffusion\stable-diffusion-webui\venv\lib\site-packages\gradio\processing_utils.py", line 20, in <module> from gradio import encryptor, utils File "C:\StableDiffusion\stable-diffusion-webui\venv\lib\site-packages\gradio\utils.py", line 35, in <module> import httpx File "C:\StableDiffusion\stable-diffusion-webui\venv\lib\site-packages\httpx\__init__.py", line 2, in <module> from ._api import delete, get, head, options, patch, post, put, request, stream File "C:\StableDiffusion\stable-diffusion-webui\venv\lib\site-packages\httpx\_api.py", line 4, in <module> from ._client import Client File "C:\StableDiffusion\stable-diffusion-webui\venv\lib\site-packages\httpx\_client.py", line 29, in <module> from ._transports.default import AsyncHTTPTransport, HTTPTransport File "C:\StableDiffusion\stable-diffusion-webui\venv\lib\site-packages\httpx\_transports\default.py", line 30, in <module> import httpcore File "C:\StableDiffusion\stable-diffusion-webui\venv\lib\site-packages\httpcore\__init__.py", line 1, in <module> from ._api import request, stream File "C:\StableDiffusion\stable-diffusion-webui\venv\lib\site-packages\httpcore\_api.py", line 5, in <module> from ._sync.connection_pool import ConnectionPool File "C:\StableDiffusion\stable-diffusion-webui\venv\lib\site-packages\httpcore\_sync\__init__.py", line 1, in <module> from .connection import HTTPConnection File "C:\StableDiffusion\stable-diffusion-webui\venv\lib\site-packages\httpcore\_sync\connection.py", line 13, in <module> from .http11 import HTTP11Connection File "C:\StableDiffusion\stable-diffusion-webui\venv\lib\site-packages\httpcore\_sync\http11.py", line 44, in <module> class HTTP11Connection(ConnectionInterface): File "C:\StableDiffusion\stable-diffusion-webui\venv\lib\site-packages\httpcore\_sync\http11.py", line 140, in HTTP11Connection self, event: h11.Event, timeout: Optional[float] = None AttributeError: module 'h11' has no attribute 'Event' Appuyez sur une touche pour continuer... 

`

Hello everyone I'm a newbie trying to use Stable Diffusion :'( I tried to launch it for the first time but it got stuck each time to this error, I honestly don't really know what i'm supposed to do right now.

3 Answers

Seems you have to reinstall httpcore in version 0.15

pip install --force-reinstall httpcore==0.15
works as a temporary workaround until some other fix is found. That or just append it to your requirement.txt This comes from a recent update in httpcore and nothing related to this repository.

Source:

I solved this issue by adding the below line in pipfile

httpcore = "<=0.15" 

that is the solution for who using pipenv

Don't feel bad, for me it starts right up in windows. But I've tried several distros and installations since Aug and it has never run once.

update:I kept banging away at it, and it finally worked! I just made this I ran it with "python launch.py" and every time an error popped up I searched for it and applied the recommended fix...good luck!