sklearn
deprecated sklearn package, use scikit-learn instead
Decision gist · record as of 2026-08-14
No. Do not install this package. It is a deprecated placeholder that blocks installation by design since 2023-12-01. This package exists only to prevent misuse of the package name and redirect users to the correct alternative.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Installation is blocked by design since 2023-12-01.
- The sklearn package on PyPI is a deprecated redirect, not a functional library.
- Installation is blocked as of 2023-12-01 with an exception.
License · maintenance · safety
(unclear)
last release 2023-12-01 (987 days)
0 known vulnerabilities (OSV.dev, 2026-08-14) · 1,585,832 downloads/mo, #3,739 on PyPI
Alternatives
Verify before relying
# Do not install sklearn
# Attempting installation will raise an exception as of 2023-12-01
# unless SKLEARN_ALLOW_DEPRECATED_SKLEARN_PACKAGE_INSTALL=True is set- Whether the installation block remains in effect in current PyPI state
- Current behavior when SKLEARN_ALLOW_DEPRECATED_SKLEARN_PACKAGE_INSTALL is set to True
- What the correct alternative package name is and how to migrate
What it is and what it does
This is a deprecated placeholder published on PyPI to prevent misuse of the sklearn package name. The package exists to redirect users and block accidental installations. Since 2023-12-01, attempting to install sklearn raises an exception by design. The package is dormant and serves no functional purpose other than namespace protection. Anyone encountering this package should switch to the correct alternative for pip installation and dependency declarations.
Use it for
- Identifying why pip install sklearn fails and understanding the deprecation reason
- Finding and fixing dependency declarations that incorrectly specify sklearn instead of the intended package
- Checking dependency chains to locate upstream packages that may reference the wrong package name
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
No.
Do not install this package. It is a deprecated placeholder that blocks installation by design since 2023-12-01. This package exists only to prevent misuse of the package name and redirect users to the correct alternative.
Install
sklearn on PyPI
Before you install
Installation is blocked as of 2023-12-01 with an exception. The package is dormant (last release 2023-12-01) and exists solely to prevent misuse of the package name; attempting to install will fail unless the environment variable SKLEARN_ALLOW_DEPRECATED_SKLEARN_PACKAGE_INSTALL is set to True.
Installation is blocked by design since 2023-12-01. The sklearn package on PyPI is a deprecated redirect, not a functional library.
Quickstart
# Do not install sklearn
# Attempting installation will raise an exception as of 2023-12-01
# unless SKLEARN_ALLOW_DEPRECATED_SKLEARN_PACKAGE_INSTALL=True is setVerify before relying
- Whether the installation block remains in effect in current PyPI state
- Current behavior when SKLEARN_ALLOW_DEPRECATED_SKLEARN_PACKAGE_INSTALL is set to True
- What the correct alternative package name is and how to migrate
Package facts
| License | Not declared unclear |
| Python support | Not specified |
| Install friction | High. Source build required |
| Runtime dependencies | None |
| Maintenance | Dormant 987 days since the last release |
| First released | |
| Downloads | 1,585,832 / month, #3,739 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
Evidence: sklearn-0.0.post12.tar.gz
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