PyPI · pypi:lmfit

lmfit active

Least-Squares Minimization with Bounds and Constraints

The latest stable version of lmfit is 1.3.4, published on 2025-07-19. Verified by Vigia on 2026-11-13.

Latest stable version	1.3.4
Published	2025-07-19 20:09:00 UTC
Install	`pip install --upgrade lmfit`
Requires	`python >=3.9`
License	BSD-3-Clause
Advisories on latest version	none known
Last verified	2026-11-13 17:37:10 UTC
Sources	pypi.org

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Maintenance

Activity	slowing down
Last stable release	2025-07-19 20:09:00 UTC · 481 days ago
Stable releases in the last 12 months	0
Published versions	42

Heuristic based only on release dates; it does not measure issue or security response times.

Version history

Version	Published
`1.3.4`	2025-07-19 20:09:00 UTC
`1.3.3`	2025-03-12 18:28:34 UTC
`1.3.2`	2024-07-19 16:17:55 UTC
`1.3.1`	2024-04-19 16:03:22 UTC
`1.3.0`	2024-04-04 17:32:05 UTC
`1.2.2`	2023-07-14 02:56:29 UTC
`1.2.1`	2023-05-02 17:53:17 UTC
`1.2.0`	2023-04-08 19:48:56 UTC
`1.1.0`	2022-11-28 04:57:45 UTC
`1.0.3`	2021-10-14 19:53:01 UTC
`1.0.2`	2021-02-07 22:46:27 UTC
`1.0.1`	2020-05-07 21:30:37 UTC
`1.0.0`	2019-12-20 20:00:12 UTC
`0.9.15`	2019-12-09 05:07:09 UTC
`0.9.14`	2019-08-29 17:41:23 UTC
`0.9.13`	2019-04-02 02:46:13 UTC
`0.9.12`	2018-11-29 16:30:32 UTC
`0.9.11`	2018-06-29 18:08:06 UTC
`0.9.10`	2018-05-18 11:37:00 UTC
`0.9.9`	2018-03-20 16:29:17 UTC

Showing the 20 most recent of 41 versions. JSON

Version compatibility

Newest stable version that declares support for each runtime version (from the requirements published with each version).

Runtime	Newest compatible version
`python 3.8`	`1.3.2`
`python 3.9`	`1.3.4`
`python 3.10`	`1.3.4`
`python 3.11`	`1.3.4`
`python 3.12`	`1.3.4`
`python 3.13`	`1.3.4`

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Frequently asked questions

What is the latest version of lmfit?

The latest stable version of lmfit is 1.3.4, published on 2025-07-19. Verified by Vigia on 2026-11-13.

How do I install the latest version of lmfit?

Run pip install --upgrade lmfit. The latest stable version is 1.3.4 (verified 2026-11-13).

Is lmfit deprecated?

No. lmfit is not marked as deprecated in the registry.

Which Python version does lmfit require?

lmfit 1.3.4 declares this requirement: python >=3.9.

Does lmfit 1.3.4 have known vulnerabilities?

No known advisories affect lmfit 1.3.4 according to the data Vigia checks.

Is lmfit still maintained?

lmfit published 0 stable releases in the last 12 months; the most recent was 481 days ago. Activity: slowing down.

Observed changes

No changes observed yet since Vigia started tracking this package.

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