Concurim
See how Python runs together. Concurim records what your threads and asyncio tasks actually do, then replays that one run as an animation.
Setup
From a checkout. After 0.1.0 is on PyPI, uvx concurim opens the same
home screen.
git clone https://github.com/ej-sanmartin/concurim.git
cd concurim
uv sync
uv run concurim
uv run concurim demo
uv run concurim record --open --auto sync my_app.py
uv run concurim record --open --include-source -o run.concurim my_app.py arg1
uv run concurim view run.concurim
uv run concurim inspect run.concurim
uv run concurim compare one.concurim two.concurim
uv run concurim export run.concurim -o clip.mp4 --events 5:40
uv run concurim opens the page. Drop a .py file or a folder, read the
plan, then click Record execution. Drop a .concurim file, or open
an example, and nothing runs. Options on record come before the script.
uvx concurim record cannot import a project's packages; install it
there with uv add --dev concurim and use uv run.
A recording of threaded_pipeline.py
(event 41 of 120): two producers and two consumers share a queue of
capacity 3.
Status: 0.1 (alpha). Not on PyPI yet. Threads, queues, locks, events, barriers, pools, and asyncio are included. What is and is not observed.
Guide
| Getting started | The page, the commands, a stuck run |
| Concepts | One schedule, observed versus inferred, what you can trust |
| Recording | Home screen, --auto, record(), Traced* |
| Reading a run | Animation, Code, Timeline, compare, export |
| Teaching | Which example to open |
| Cost | Overhead of recording |
| Limitations | Caveats |
| Trace format | The .concurim file |
| Security | Local only. Review a trace before sharing it |
| Contributing | Tests, style, publishing |
| Changelog | What 0.1.0 contains |
The viewer binds 127.0.0.1 and has no telemetry. Source and payload
previews are off unless you ask for them.
MIT licensed.
1 maintainer
Metadata
1 maintainer
Release files for concurim 0.1.0
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | Provenance | Actions |
|---|---|---|---|---|
| concurim-0.1.0.tar.gz | 1.8 MB | With provenance | Details for concurim-0.1.0.tar.gz |
Built distribution (wheel)
| File | Interpreter | ABI | Platform | Actions Reset |
|---|---|---|---|---|
| concurim-0.1.0-py3-none-any.whl | Python 3 | none | any | Details for concurim-0.1.0-py3-none-any.whl |
Total release size: 2.5 MB
Release files / concurim-0.1.0.tar.gz
| Download URL | concurim-0.1.0.tar.gz |
|---|---|
| Size | 1.8 MB |
| Tags | Source |
|
SHA-256 checksum How to use checksums |
8ee610296265489383768981796c2fbfbd7b951ce0090e38ada11b6ae58faf96
|
|
BLAKE2b-256 checksum How to use checksums |
759073b20cbb31d51d8e3114f2250dbff67021c43d685f884aa4bf5e1f328c53
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| Upload date | |
|
Uploaded using Trusted Publishing? What is trusted publishing? |
Yes |
| Uploaded via |
twine/7.0.0 CPython/3.13.16
|
Provenance
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Signed by GitHub Actions, verified by PyPI on Oct 28, 2026.
Transparency logRelease files / concurim-0.1.0-py3-none-any.whl
| Download URL | concurim-0.1.0-py3-none-any.whl |
|---|---|
| Size | 704.5 kB |
| Tags | Python 3 |
|
SHA-256 checksum How to use checksums |
729473546be91ce1a71fa8658f03520b6d10b3270555a2c4386f5d0cd6ecca48
|
|
BLAKE2b-256 checksum How to use checksums |
20e487da595b15be248060f4a6333a71f5c395743f2fcb3f3754ec7916105e15
|
| Upload date | |
|
Uploaded using Trusted Publishing? What is trusted publishing? |
Yes |
| Uploaded via |
twine/7.0.0 CPython/3.13.16
|
Provenance
Provenance describes where a file came from. On PyPI, provenance is shared via attestations, which provide a verifiable record of the build or publishing details. View details, limitations and caveats.
PyPI Publish Attestation
PyPI verified that this artifact, at this checksum, originated from the publisher listed below.
Signed by GitHub Actions, verified by PyPI on Oct 28, 2026.
Transparency logSecurity for concurim 0.1.0
Provenance
Provenance describes where a file came from. On PyPI, provenance is shared via attestations, which provide a verifiable record of the build or publishing details. View details, limitations and caveats.
Full provenance
Both files in this release have been uploaded with provenance metadata.
Attestation for concurim-0.1.0.tar.gz
PyPI Publish Attestation
PyPI verified that this artifact, at this checksum, originated from the publisher listed below.
Signed by GitHub Actions, verified by PyPI on Oct 28, 2026.
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