asserts
Stand-alone Assertions
Decision gist · record as of 2026-08-14
Yes, if you need stand-alone assertions outside unittest.TestCase. The package is actively maintained, has low install friction, and carries no known vulnerabilities. However, verify the license before use in proprietary contexts, and note that it is classified as Alpha—suitable for testing and development but not yet marked as stable.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires Python 3.10 or later.
- Low friction install with a single runtime dependency (typing-extensions).
- Active maintenance with a recent release (270 days ago) and ongoing repository activity.
License · maintenance · safety
(unclear) — License status is unclear—no SPDX identifier or raw license text is available in the package metadata. Verify the actual license before use in proprietary or restricted contexts.
last release 2025-11-17 (270 days) · last repo commit 2026-07-27 · 16 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 106,072 downloads/mo, #12,669 on PyPI
Alternatives
Verify before relying
pip install asserts
from asserts import assert_equal, assert_true, assert_raises
assert_equal(13, 13)
assert_true(True, msg="custom message")
with assert_raises(KeyError):
raise KeyError()- Whether the package is suitable for production use given its 'Alpha' development status classification.
- What the actual license is, since license_treatment is marked unclear and no SPDX or raw license text is provided.
What it is and what it does
asserts is a lightweight library of assertion functions designed to work independently of unittest.TestCase. Instead of inheriting from TestCase to get assertion methods, you import assertion functions directly—useful in test classes that don't derive from TestCase, in mock and fake implementations, or as a richer alternative to Python's built-in assert statement. The library includes common assertions like assert_equal, assert_true, and assert_raises, all with customizable failure messages and PEP 8 compliance.
The package trades away a couple of TestCase features (custom assertion classes and addTypeEqualityFunc support) for cleaner separation of concerns: your test runner handles test execution, and assertion functions handle validation. It depends only on typing-extensions and requires Python 3.10 or later.
Use it for
- Write assertions in test classes that don't inherit from unittest.TestCase.
- Add rich assertion checks to mock and fake object implementations.
- Use assertions in production code as a more readable alternative to the assert statement.
- Customize assertion failure messages with format strings for clearer test output.
- Build custom assertion functions by extending the library's assertion patterns.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes, if you need stand-alone assertions outside unittest.TestCase.
The package is actively maintained, has low install friction, and carries no known vulnerabilities. However, verify the license before use in proprietary contexts, and note that it is classified as Alpha—suitable for testing and development but not yet marked as stable.
Install
asserts on PyPI
Before you install
Low friction install with a single runtime dependency (typing-extensions). Active maintenance with a recent release (270 days ago) and ongoing repository activity.
Requires Python 3.10 or later.
License in practice
License status is unclear—no SPDX identifier or raw license text is available in the package metadata. Verify the actual license before use in proprietary or restricted contexts.
Quickstart
pip install asserts
from asserts import assert_equal, assert_true, assert_raises
assert_equal(13, 13)
assert_true(True, msg="custom message")
with assert_raises(KeyError):
raise KeyError()Verify before relying
- Whether the package is suitable for production use given its 'Alpha' development status classification.
- What the actual license is, since license_treatment is marked unclear and no SPDX or raw license text is provided.
Package facts
| License | Not declared unclear |
| Python support | Supports the current Python release >=3.10 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 1 packagetyping-extensions |
| Maintenance | Actively maintained 270 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 106,072 / month, #12,669 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Development Status :: 3 - AlphaIntended Audience :: DevelopersTopic :: Software Development :: Quality AssuranceTopic :: Software Development :: Testing |
Evidence: asserts-0.14.0-py3-none-any.whl
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