I have searched for any existing and/or related issues.
I have searched for any existing and/or related discussions.
I have also searched in the CLOSED issues AND CLOSED discussions and found no related items (your issue might already be addressed on the development branch!).
I am using the latest version of Open WebUI.
Installation Method
Docker
Open WebUI Version
v0.7.2
Ollama Version (if applicable)
No response
Operating System
Fedora 43
Browser (if applicable)
No response
Confirmation
I have read and followed all instructions in README.md.
I am using the latest version of both Open WebUI and Ollama.
I have included the browser console logs.
I have included the Docker container logs.
I have provided every relevant configuration, setting, and environment variable used in my setup.
I have clearly listed every relevant configuration, custom setting, environment variable, and command-line option that influences my setup (such as Docker Compose overrides, .env values, browser settings, authentication configurations, etc).
I have documented step-by-step reproduction instructions that are precise, sequential, and leave nothing to interpretation. My steps:
Start with the initial platform/version/OS and dependencies used,
Specify exact install/launch/configure commands,
List URLs visited, user input (incl. example values/emails/passwords if needed),
Describe all options and toggles enabled or changed,
Include any files or environmental changes,
Identify the expected and actual result at each stage,
Ensure any reasonably skilled user can follow and hit the same issue.
Expected Behavior
no ANSI colors inside the code send to Jupyter.
Actual Behavior
Using a prompt to generate some code and execute it sometimes work, like here:
# Calculate and print the first 10 Fibonacci numbersdeffib(n):a,b=0,1out=[]for_inrange(n):out.append(a)a,b=b,a+breturnoutprint("First 10 Fibonacci numbers:")print(fib(10))STDOUT/STDERRFirst10Fibonaccinumbers:[0,1,1,2,3,5,8,13,21,34]
But sometimes the code doesn't work because there are ASCII escape sequences that were submitted at the prompt:
Originally created by @mchehab on GitHub (Feb 1, 2026).
Original GitHub issue: https://github.com/open-webui/open-webui/issues/21091
### Check Existing Issues
- [x] I have searched for any existing and/or related issues.
- [x] I have searched for any existing and/or related discussions.
- [x] I have also searched in the CLOSED issues AND CLOSED discussions and found no related items (your issue might already be addressed on the development branch!).
- [x] I am using the latest version of Open WebUI.
### Installation Method
Docker
### Open WebUI Version
v0.7.2
### Ollama Version (if applicable)
_No response_
### Operating System
Fedora 43
### Browser (if applicable)
_No response_
### Confirmation
- [x] I have read and followed all instructions in `README.md`.
- [x] I am using the latest version of **both** Open WebUI and Ollama.
- [x] I have included the browser console logs.
- [x] I have included the Docker container logs.
- [x] I have **provided every relevant configuration, setting, and environment variable used in my setup.**
- [x] I have clearly **listed every relevant configuration, custom setting, environment variable, and command-line option that influences my setup** (such as Docker Compose overrides, .env values, browser settings, authentication configurations, etc).
- [x] I have documented **step-by-step reproduction instructions that are precise, sequential, and leave nothing to interpretation**. My steps:
- Start with the initial platform/version/OS and dependencies used,
- Specify exact install/launch/configure commands,
- List URLs visited, user input (incl. example values/emails/passwords if needed),
- Describe all options and toggles enabled or changed,
- Include any files or environmental changes,
- Identify the expected and actual result at each stage,
- Ensure any reasonably skilled user can follow and hit the same issue.
### Expected Behavior
no ANSI colors inside the code send to Jupyter.
### Actual Behavior
Using a prompt to generate some code and execute it sometimes work, like here:
```python
# Calculate and print the first 10 Fibonacci numbers
def fib(n):
a, b = 0, 1
out = []
for _ in range(n):
out.append(a)
a, b = b, a + b
return out
print("First 10 Fibonacci numbers:")
print(fib(10))
STDOUT/STDERR
First 10 Fibonacci numbers:
[0, 1, 1, 2, 3, 5, 8, 13, 21, 34]
```
But sometimes the code doesn't work because there are ASCII escape sequences that were submitted at the prompt:
```python
def fib(n):
...
print(...)
STDOUT/STDERR
[36mCell[39m[36m [39m[32mIn[1][39m[32m, line 3[39m
[31m [39m[31mprint(...)[39m
^
[31mIndentationError[39m[31m:[39m expected an indented block after function definition on line 1
```
In particular, all the times I ask something more complex, like runing the example at:
https://docs.openwebui.com/tutorials/integrations/jupyter#create-a-visualization
it ends adding ANSI colors at the output, causing it to fail.
### Steps to Reproduce
1. Install 3 separate containers in docker:
- ollama - built from https://github.com/ollama/ollama.git DockerFile
- open-webui - from ghcr.io/open-webui/open-webui:main
- junyper - from quay.io/jupyter/scipy-notebook
2. setup it to use Junyper integration for code execution
3. use a prompt that will try to use code executer.
### Logs & Screenshots
Logs at Ollama, Jupyter and Open WebUI are OK, nothing weird reported there.
Jupyter log shows that the Kernel was properly created and executed:
```
[I 2026-02-01 15:07:30.856 ServerApp] Kernel started: 39860cb7-88e0-4215-ab1c-3a21bb72df7c
[W 2026-02-01 15:07:30.858 ServerApp] No session ID specified
[I 2026-02-01 15:07:31.156 ServerApp] Adapting from protocol version 5.3 (kernel 39860cb7-88e0-4215-ab1c-3a21bb72df7c) to 5.4 (client).
[I 2026-02-01 15:07:31.156 ServerApp] Connecting to kernel 39860cb7-88e0-4215-ab1c-3a21bb72df7c.
[I 2026-02-01 15:07:31.224 ServerApp] Starting buffering for 39860cb7-88e0-4215-ab1c-3a21bb72df7c:6e2de725-c467663054dfc536ed1ca424
[I 2026-02-01 15:07:31.225 ServerApp] Kernel shutdown: 39860cb7-88e0-4215-ab1c-3a21bb72df7c
```
Open WebUI logs:
```
2026-02-01 15:07:30.966 | INFO | uvicorn.protocols.http.httptools_impl:send:483 - 127.0.0.1:0 - "GET /api/v1/chats/05e01787-c066-4cb7-9e0a-a3abd572beec HTTP/1.1" 200
2026-02-01 15:07:31.156 | INFO | open_webui.utils.code_interpreter:execute_in_jupyter:172 - sending JSON message: ('{"header": {"msg_id": "04df4727140441c8bd216d3401a54f43", "msg_type": '
'"execute_request", "username": "user", "session": '
'"d7cf310dd9e546caa56c9f59acf78148", "date": "2026-02-01T15:07:31.156792", '
'"version": "5.3"}, "parent_header": {}, "metadata": {}, "content": {"code": '
'"def print_hello():\\n print(\\"Hello, World!\\")\\nprint_hello()", '
'"silent": false, "store_history": true, "user_expressions": {}, '
'"allow_stdin": false, "stop_on_error": true}, "channel": "shell"}')
2026-02-01 15:07:31.157 | INFO | open_webui.utils.code_interpreter:execute_in_jupyter:176 - waiting answer
2026-02-01 15:07:31.224 | INFO | open_webui.utils.code_interpreter:run:83 - code executed.
```
Ollama logs:
```
[GIN] 2026/02/01 - 15:07:28 | 200 | 553.150516ms | 172.17.0.3 | POST "/api/chat"
[GIN] 2026/02/01 - 15:07:29 | 200 | 99.470281ms | 172.17.0.3 | POST "/api/chat"
[GIN] 2026/02/01 - 15:07:29 | 200 | 97.065211ms | 172.17.0.3 | POST "/api/chat"
[GIN] 2026/02/01 - 15:07:30 | 200 | 89.458762ms | 172.17.0.3 | POST "/api/chat"
[GIN] 2026/02/01 - 15:07:30 | 200 | 84.068772ms | 172.17.0.3 | POST "/api/chat"
[GIN] 2026/02/01 - 15:07:31 | 200 | 87.481288ms | 172.17.0.3 | POST "/api/chat"
[GIN] 2026/02/01 - 15:07:31 | 200 | 537.2191ms | 172.17.0.3 | POST "/api/chat"
```
### Additional Information
_No response_
GiteaMirror
added the bug label 2026-05-13 06:33:50 -05:00
@owui-terminator[bot] commented on GitHub (Feb 1, 2026):
🔍Similar Issues Found
I found some existing issues that might be related to this one. Please check if any of these are duplicates or contain helpful solutions:
#21034issue: arena doesnt work properly by thekinez • Jan 29, 2026 • bug
💡Tips:
If this is a duplicate, please consider closing this issue and adding any additional details to the existing one
If you found a solution in any of these issues, please share it here to help others
This comment was generated automatically by a bot. Please react with a 👍 if this comment was helpful, or a 👎 if it was not.
<!-- gh-comment-id:3831191972 -->
@owui-terminator[bot] commented on GitHub (Feb 1, 2026):
🔍 **Similar Issues Found**
I found some existing issues that might be related to this one. Please check if any of these are duplicates or contain helpful solutions:
1. [#21034](https://github.com/open-webui/open-webui/issues/21034) **issue: arena doesnt work properly**
*by thekinez • Jan 29, 2026 • `bug`*
---
💡 **Tips:**
- If this is a duplicate, please consider closing this issue and adding any additional details to the existing one
- If you found a solution in any of these issues, please share it here to help others
*This comment was generated automatically by a bot.* Please react with a 👍 if this comment was helpful, or a 👎 if it was not.
Blocking a user prevents them from interacting with repositories, such as opening or commenting on pull requests or issues. Learn more about blocking a user.
Originally created by @mchehab on GitHub (Feb 1, 2026).
Original GitHub issue: https://github.com/open-webui/open-webui/issues/21091
Check Existing Issues
Installation Method
Docker
Open WebUI Version
v0.7.2
Ollama Version (if applicable)
No response
Operating System
Fedora 43
Browser (if applicable)
No response
Confirmation
README.md.Expected Behavior
no ANSI colors inside the code send to Jupyter.
Actual Behavior
Using a prompt to generate some code and execute it sometimes work, like here:
But sometimes the code doesn't work because there are ASCII escape sequences that were submitted at the prompt:
In particular, all the times I ask something more complex, like runing the example at:
https://docs.openwebui.com/tutorials/integrations/jupyter#create-a-visualization
it ends adding ANSI colors at the output, causing it to fail.
Steps to Reproduce
setup it to use Junyper integration for code execution
use a prompt that will try to use code executer.
Logs & Screenshots
Logs at Ollama, Jupyter and Open WebUI are OK, nothing weird reported there.
Jupyter log shows that the Kernel was properly created and executed:
Open WebUI logs:
Ollama logs:
Additional Information
No response
@owui-terminator[bot] commented on GitHub (Feb 1, 2026):
🔍 Similar Issues Found
I found some existing issues that might be related to this one. Please check if any of these are duplicates or contain helpful solutions:
by thekinez • Jan 29, 2026 •
bug💡 Tips:
This comment was generated automatically by a bot. Please react with a 👍 if this comment was helpful, or a 👎 if it was not.
@tjbck commented on GitHub (Feb 6, 2026):
Addressed in dev!