# Is progress bar in marimo broken for everyone with v6.0.0, or it's just me?

**URL:** <https://discourse.pymc.io/t/is-progress-bar-in-marimo-broken-for-everyone-with-v6-0-0-or-its-just-me/17715>\
**Category:** General\
**Created:** [May 15, 2026, 6:05pm UTC](https://discourse.pymc.io/t/is-progress-bar-in-marimo-broken-for-everyone-with-v6-0-0-or-its-just-me/17715 "2026-05-15T18:05:51Z")\
**Posts on this page:** 15\
**Page:** 1

<div class="post-metadata">

**Author:** ![Cricket4444](https://avatars.discourse-cdn.com/v4/letter/c/f04885/32.png) [@Cricket4444](https://discourse.pymc.io/u/Cricket4444)\
**Post date:** [May 15, 2026, 6:05pm UTC](https://discourse.pymc.io/t/is-progress-bar-in-marimo-broken-for-everyone-with-v6-0-0-or-its-just-me/17715/1 "2026-05-15T18:05:51Z")

</div>

```auto
with pm.observe(m_hierarchical, {"something": data}):
    idata_h = pm.sample(
        target_accept=0.95,
    )

```

 ![image](https://canada1.discourse-cdn.com/flex036/uploads/pymc3/original/2X/5/57634b2b4346f986a7608946d666dca7f031401e.png)

After sampling finishes it comes up alright:

 ![image](https://canada1.discourse-cdn.com/flex036/uploads/pymc3/original/2X/a/a858aea64ffa3ba3b1b685ff36a49cfc5b8c6975.png)

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<div class="post-metadata">

**Author:** ![jessegrabowski](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.pymc.io/jessegrabowski/32/5010_2.png) [@jessegrabowski](https://discourse.pymc.io/u/jessegrabowski)\
**Post date:** [May 15, 2026, 6:07pm UTC](https://discourse.pymc.io/t/is-progress-bar-in-marimo-broken-for-everyone-with-v6-0-0-or-its-just-me/17715/2 "2026-05-15T18:07:13Z")

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@fonnesbeck

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<div class="post-metadata">

**Author:** ![fonnesbeck](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.pymc.io/fonnesbeck/32/13_2.png) [@fonnesbeck](https://discourse.pymc.io/u/fonnesbeck)\
**Post date:** [May 15, 2026, 6:30pm UTC](https://discourse.pymc.io/t/is-progress-bar-in-marimo-broken-for-everyone-with-v6-0-0-or-its-just-me/17715/3 "2026-05-15T18:30:48Z")

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Was working with this yesterday, and it works fine for me. Progress bar looks like this both during and after sampling.

 ![image](https://canada1.discourse-cdn.com/flex036/uploads/pymc3/original/2X/b/b9e719ff508127836807acc52a7500d83ca2d671.png)

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<div class="post-metadata">

**Author:** ![Cricket4444](https://avatars.discourse-cdn.com/v4/letter/c/f04885/32.png) [@Cricket4444](https://discourse.pymc.io/u/Cricket4444)\
**Post date:** [May 15, 2026, 6:51pm UTC](https://discourse.pymc.io/t/is-progress-bar-in-marimo-broken-for-everyone-with-v6-0-0-or-its-just-me/17715/4 "2026-05-15T18:51:49Z")

</div>

Hmm, any idea how to debug? I started a new notebook - no dice, the progress bar comes up only after sampling is finished. Also if i interrupt it, it briefly comes up and then disappears. `marimo==0.23.6`

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<div class="post-metadata">

**Author:** ![ricardoV94](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.pymc.io/ricardov94/32/5775_2.png) [@ricardoV94](https://discourse.pymc.io/u/ricardoV94)\
**Post date:** [May 15, 2026, 7:35pm UTC](https://discourse.pymc.io/t/is-progress-bar-in-marimo-broken-for-everyone-with-v6-0-0-or-its-just-me/17715/5 "2026-05-15T19:35:11Z")

</div>

Can you try some variants? cores=1 (so no multiprocessing) and nuts\_sampler=“pymc” vs “nutpie”?

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<div class="post-metadata">

**Author:** ![Cricket4444](https://avatars.discourse-cdn.com/v4/letter/c/f04885/32.png) [@Cricket4444](https://discourse.pymc.io/u/Cricket4444)\
**Post date:** [May 15, 2026, 7:39pm UTC](https://discourse.pymc.io/t/is-progress-bar-in-marimo-broken-for-everyone-with-v6-0-0-or-its-just-me/17715/6 "2026-05-15T19:39:29Z")

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> [@ricardoV94](#):
>
> nuts\_sampler=“pymc”

pymc sampler works both single and multithreaded, nutpie does not work both single and multithreaded.

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<div class="post-metadata">

**Author:** ![fonnesbeck](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.pymc.io/fonnesbeck/32/13_2.png) [@fonnesbeck](https://discourse.pymc.io/u/fonnesbeck)\
**Post date:** [May 15, 2026, 7:51pm UTC](https://discourse.pymc.io/t/is-progress-bar-in-marimo-broken-for-everyone-with-v6-0-0-or-its-just-me/17715/7 "2026-05-15T19:51:38Z")

</div>

What are your environment details?

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<div class="post-metadata">

**Author:** ![Cricket4444](https://avatars.discourse-cdn.com/v4/letter/c/f04885/32.png) [@Cricket4444](https://discourse.pymc.io/u/Cricket4444)\
**Post date:** [May 15, 2026, 7:57pm UTC](https://discourse.pymc.io/t/is-progress-bar-in-marimo-broken-for-everyone-with-v6-0-0-or-its-just-me/17715/8 "2026-05-15T19:57:35Z")

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```auto
{
  "marimo": "0.23.6",
  "editable": false,
  "location": "<...>/.venv/lib/python3.12/site-packages/marimo",
  "OS": "Darwin",
  "OS Version": "24.6.0",
  "Processor": "arm",
  "Python Version": "3.12.11",
  "Locale": "C/en_US",
  "Binaries": {
    "Browser": "147.0.7727.138",
    "Node": "v24.3.0",
    "uv": "0.7.11 (Homebrew 2025-06-04)"
  },
  "Dependencies": {
    "click": "8.3.3",
    "docutils": "0.22.4",
    "itsdangerous": "2.2.0",
    "jedi": "0.19.2",
    "markdown": "3.10.2",
    "narwhals": "2.20.0",
    "packaging": "26.2",
    "psutil": "7.2.2",
    "pygments": "2.20.0",
    "pymdown-extensions": "10.21.2",
    "pyyaml": "6.0.3",
    "starlette": "1.0.0",
    "tomlkit": "0.14.0",
    "typing-extensions": "4.15.0",
    "uvicorn": "0.46.0",
    "websockets": "16.0"
  },
  "Optional Dependencies": {
    "loro": "1.10.3",
    "pandas": "2.3.3",
    "pyarrow": "24.0.0",
    "pytest": "9.0.2",
    "ruff": "0.15.12"
  },
  "Experimental Flags": {}
}

```

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<div class="post-metadata">

**Author:** ![ricardoV94](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.pymc.io/ricardov94/32/5775_2.png) [@ricardoV94](https://discourse.pymc.io/u/ricardoV94)\
**Post date:** [May 15, 2026, 8:08pm UTC](https://discourse.pymc.io/t/is-progress-bar-in-marimo-broken-for-everyone-with-v6-0-0-or-its-just-me/17715/9 "2026-05-15T20:08:09Z")

</div>

Can you share your pymc and nutpie versions as well?

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<div class="post-metadata">

**Author:** ![Cricket4444](https://avatars.discourse-cdn.com/v4/letter/c/f04885/32.png) [@Cricket4444](https://discourse.pymc.io/u/Cricket4444)\
**Post date:** [May 15, 2026, 8:10pm UTC](https://discourse.pymc.io/t/is-progress-bar-in-marimo-broken-for-everyone-with-v6-0-0-or-its-just-me/17715/10 "2026-05-15T20:10:11Z")

</div>

```auto
❯ uv pip show pymc nutpie
Using Python 3.12.11 environment at: .venv
Name: nutpie
Version: 0.16.10
Location: .venv/lib/python3.12/site-packages
Requires: arro3-core, arviz, obstore, pandas, platformdirs, pyarrow, xarray, zarr
Required-by:
---
Name: pymc
Version: 6.0.0
Location: .venv/lib/python3.12/site-packages
Requires: arviz, cachetools, cloudpickle, numpy, pandas, pytensor, rich, scipy, threadpoolctl, typing-extensions
Required-by: pymc-extras

```

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<div class="post-metadata">

**Author:** ![ricardoV94](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.pymc.io/ricardov94/32/5775_2.png) [@ricardoV94](https://discourse.pymc.io/u/ricardoV94)\
**Post date:** [May 15, 2026, 8:13pm UTC](https://discourse.pymc.io/t/is-progress-bar-in-marimo-broken-for-everyone-with-v6-0-0-or-its-just-me/17715/11 "2026-05-15T20:13:56Z")

</div>

will try to run on marimo tomorrow to see if I can reproduce. What OS are you in?

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<div class="post-metadata">

**Author:** ![Cricket4444](https://avatars.discourse-cdn.com/v4/letter/c/f04885/32.png) [@Cricket4444](https://discourse.pymc.io/u/Cricket4444)\
**Post date:** [May 15, 2026, 8:22pm UTC](https://discourse.pymc.io/t/is-progress-bar-in-marimo-broken-for-everyone-with-v6-0-0-or-its-just-me/17715/12 "2026-05-15T20:22:55Z")

</div>

MacOS 15.7.5 (24G624)

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<div class="post-metadata">

**Author:** ![ricardoV94](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.pymc.io/ricardov94/32/5775_2.png) [@ricardoV94](https://discourse.pymc.io/u/ricardoV94)\
**Post date:** [May 16, 2026, 12:21pm UTC](https://discourse.pymc.io/t/is-progress-bar-in-marimo-broken-for-everyone-with-v6-0-0-or-its-just-me/17715/13 "2026-05-16T12:21:23Z")

</div>

I can reproduce marimo bars don’t progress with marimo, just none → all. There’s some custom code and I have to be honest I didn’t test with marimo ahead of time.

Also noticed marimo keeps updating speed for finished bars in PyMC… Will try to fix. Thanks a lot for reporting

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<div class="post-metadata">

**Author:** ![ricardoV94](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.pymc.io/ricardov94/32/5775_2.png) [@ricardoV94](https://discourse.pymc.io/u/ricardoV94)\
**Post date:** [May 16, 2026, 1:23pm UTC](https://discourse.pymc.io/t/is-progress-bar-in-marimo-broken-for-everyone-with-v6-0-0-or-its-just-me/17715/14 "2026-05-16T13:23:52Z")

</div>

Should be fixed by [Fix marimo progress bar issues by ricardoV94 · Pull Request #8298 · pymc-devs/pymc · GitHub](https://github.com/pymc-devs/pymc/pull/8298)

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<div class="post-metadata">

**Author:** ![ricardoV94](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.pymc.io/ricardov94/32/5775_2.png) [@ricardoV94](https://discourse.pymc.io/u/ricardoV94)\
**Post date:** [May 20, 2026, 9:13pm UTC](https://discourse.pymc.io/t/is-progress-bar-in-marimo-broken-for-everyone-with-v6-0-0-or-its-just-me/17715/15 "2026-05-20T21:13:17Z")

</div>

should be fixed in 6.0.1