uproot3-methods
Pythonic mix-ins for ROOT classes.
Decision gist · record as of 2026-08-14
No—do not install for new projects. This package is deprecated, unmaintained since March 2021, and incompatible with modern versions of its dependencies. If you are maintaining legacy code that already uses it, it may continue to work if you pin awkward0 and uproot 3.x, but you should plan to migrate to the vector package and uproot 4.x. For new particle physics work, use vector instead.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires awkward0 (Awkward Array 0.x); incompatible with awkward>=1.0 and uproot>=4.0.
- Package is deprecated and no longer maintained.
- Low install friction with just two runtime dependencies (numpy and awkward0), but the repository is archived and the package is explicitly deprecated—it has not been updated since March 2021 and is incompatible with modern versions of Awkward Array and Uproot.
License · maintenance · safety
BSD 3-clause (permissive) — BSD 3-clause is permissive and poses no restrictions on commercial or proprietary use, but the deprecated status means you should expect no ongoing license updates or clarifications.
last release 2021-03-18 (1975 days) · last repo commit 2021-03-18 · 21 stars · archived
0 known vulnerabilities (OSV.dev, 2026-08-14) · 279,597 downloads/mo, #8,119 on PyPI
Alternatives
Verify before relying
pip install uproot3-methods
import uproot3_methods
# Use with uproot3 to access methods on ROOT classes
# or standalone: from uproot3_methods.classes.TLorentzVector import TLorentzVector- Whether existing code depending on this package will continue to work with current Python and NumPy versions despite the lack of maintenance.
- Whether the scikit-hep vector package is a suitable drop-in replacement for new projects needing Lorentz vector functionality.
What it is and what it does
uproot3-methods is a companion library to uproot 3.x that adds physics-specific methods to classes automatically generated from ROOT files. It provides convenient operations on particle physics objects like TLorentzVectors and histograms (TH*), allowing you to work with these objects more naturally in Python. The library can also be used standalone to create and manipulate arrays of TLorentzVectors without uproot.
However, this package is deprecated and no longer maintained. It was designed for uproot 3.x and Awkward Array 0.x, both of which are now superseded. The repository was archived in 2021, and the package is explicitly incompatible with modern versions (awkward>=1.0 and uproot>=4.0). For new projects, the scikit-hep team recommends using the vector package instead.
Use it for
- Working with legacy uproot 3.x codebases that need physics-specific methods on ROOT-derived classes.
- Standalone manipulation of TLorentzVector arrays in older particle physics analysis scripts.
- Accessing histogram methods (TH*) from ROOT files read with uproot 3.x.
- Maintaining existing analysis code that depends on uproot3-methods without upgrading to modern uproot.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
No—do not install for new projects.
This package is deprecated, unmaintained since March 2021, and incompatible with modern versions of its dependencies. If you are maintaining legacy code that already uses it, it may continue to work if you pin awkward0 and uproot 3.x, but you should plan to migrate to the vector package and uproot 4.x. For new particle physics work, use vector instead.
Install
uproot3-methods on PyPI
Before you install
Low install friction with just two runtime dependencies (numpy and awkward0), but the repository is archived and the package is explicitly deprecated—it has not been updated since March 2021 and is incompatible with modern versions of Awkward Array and Uproot.
Requires awkward0 (Awkward Array 0.x); incompatible with awkward>=1.0 and uproot>=4.0. Package is deprecated and no longer maintained.
License in practice
BSD 3-clause is permissive and poses no restrictions on commercial or proprietary use, but the deprecated status means you should expect no ongoing license updates or clarifications.
Quickstart
pip install uproot3-methods
import uproot3_methods
# Use with uproot3 to access methods on ROOT classes
# or standalone: from uproot3_methods.classes.TLorentzVector import TLorentzVectorVerify before relying
- Whether existing code depending on this package will continue to work with current Python and NumPy versions despite the lack of maintenance.
- Whether the scikit-hep vector package is a suitable drop-in replacement for new projects needing Lorentz vector functionality.
Package facts
| License | BSD 3-clause permissive |
| Python support | Not specified |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 2 packagesnumpyawkward0 |
| Maintenance | Abandoned 1,975 days since the last release |
| Last repo commit | repository archived |
| First released | |
| Downloads | 279,597 / month, #8,119 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Development Status :: 7 - InactiveIntended Audience :: DevelopersIntended Audience :: Information TechnologyIntended Audience :: Science/ResearchLicense :: OSI Approved :: BSD LicenseOperating System :: MacOSOperating System :: POSIXOperating System :: UnixProgramming Language :: PythonProgramming Language :: Python :: 2.7Programming Language :: Python :: 3.4Programming Language :: Python :: 3.5Programming Language :: Python :: 3.6Programming Language :: Python :: 3.7Programming Language :: Python :: 3.8Programming Language :: Python :: 3.9Topic :: Scientific/EngineeringTopic :: Scientific/Engineering :: Information AnalysisTopic :: Scientific/Engineering :: MathematicsTopic :: Scientific/Engineering :: PhysicsTopic :: Software DevelopmentTopic :: Utilities |
Evidence: uproot3_methods-0.10.1-py3-none-any.whl
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See also coffea · uproot3 · uproot · vector · fastjet · hepunits · mplhep · uhi · hist · mt2