---
id: trove-classifiers
version: "2026.6.1.19"
license: unclear
license_treatment: permissive
maintenance: active
---

# trove-classifiers — Canonical source for classifiers on PyPI (pypi.org).

License: permissive · Maintenance: active · Popularity: top 100 on PyPI

## Install

pip install trove-classifiers
uv add trove-classifiers
poetry add trove-classifiers

## Description

Canonical source for [classifiers][1] on [PyPI][2].

Classifiers [categorize projects][3] per [PEP 301][4]. Use this package to
validate classifiers in packages for PyPI upload or download.

## Usage

To install [from PyPI][5]:

```
$ pip install trove-classifiers
```

This package can be invoked as a module to print a list of classifiers:

```
$ python -m trove_classifiers | grep -Ei pyramid
Framework :: Pyramid
```

In addition, this package's API is two importable objects:

### Classifiers (`trove_classifiers.classifiers`)
A `set` containing classifiers (as strings). Useful for determining membership.

Example - determine if a classifier is valid:

```python
>>> from trove_classifiers import classifiers
>>> 'License :: OSI Approved' in classifiers
True
>>> 'Fuzzy :: Wuzzy :: Was :: A :: Bear' in classifiers
False
>>>
```

### Deprecated classifiers (`trove_classifiers.deprecated_classifiers`)
A `dict`, mapping a deprecated classifier (string) to a list of classifiers
which replaces it (strings).

Example - determine if a classifier is deprecated:

```python
>>> from trove_classifiers import deprecated_classifiers
>>> 'License :: OSI Approved' in...

## AI interpretation — verify before relying

Provides the canonical set of PyPI classifiers for validating project metadata, plus a mapping of deprecated classifiers to their replacements.

Verdict: A lightweight, actively maintained reference package for PyPI classifier validation with no dependencies, permissive licensing, and top-100 popularity. Safe to adopt for metadata validation workflows.

[View on SkillFed](https://skillfed.io/packages/trove-classifiers) · [View on PyPI](https://pypi.org/project/trove-classifiers/)