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[GH-ISSUE #21091] issue: code execution is not working due to ansi colors #58044

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opened 2026-05-05 22:14:35 -05:00 by GiteaMirror · 2 comments
GiteaMirror commented 2026-05-05 22:14:35 -05:00
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Originally created by @mchehab on GitHub (Feb 1, 2026).
Original GitHub issue: https://github.com/open-webui/open-webui/issues/21091

Check Existing Issues

  • 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 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:

def fib(n):
...
print(...)

STDOUT/STDERR
 
Cell In[1], line 3
    print(...)
    ^
IndentationError: 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:

  1. setup it to use Junyper integration for code execution

  2. 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

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 Cell In[1], line 3  print(...) ^ IndentationError: 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 2026-05-05 22:14:35 -05:00
GiteaMirror commented 2026-05-05 22:14:41 -05:00
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@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 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.

<!-- 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.
GiteaMirror commented 2026-05-05 22:14:45 -05:00
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@tjbck commented on GitHub (Feb 6, 2026):

Addressed in dev!

<!-- gh-comment-id:3861962059 --> @tjbck commented on GitHub (Feb 6, 2026): Addressed in dev!
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