First stable version (#1)

* First version of the code

* Changing the starting value makes the fits converge, good, need to adjust that slightly

* Improvement in minimisation routine now also allows C=0 starting value

* Add two sensible physical test

* Fix formatting and lints

* Update docs/source/conf.py

Residual name change

Co-authored-by: Copilot <[email protected]>

* Ruffing tests

* Fix mypy requirements and pipeline

---------

Co-authored-by: Copilot <[email protected]>

Author: JaLuka98

.flake8

@@ -38,7 +38,7 @@ jobs:
         run: ruff format --check .
 
       - name: mypy
-        run: mypy .
+        run: mypy ./src
 
       # ---- Tests ----
       - name: Run tests

.github/workflows/ci.yaml

@@ -1,158 +1 @@
-# template-python-lib
-
-A minimal, modern **Python library template** designed to jumpstart your project with best practices and tooling.
-
----
-
-## 🚀 Quick start: using this template
-
-### 1. Create a new repository
-- Via GitHub UI:
-  Click **Use this template** → create `my-awesome-lib`
-- Or via CLI:
-  ```bash
-  gh repo create your-org/my-awesome-lib --template JaLuka98/template-python-lib --public
-  ```
-
-### 2. Clone your new repo and enter it
-```bash
-git clone https://github.com/your-org/my-awesome-lib.git
-cd my-awesome-lib
-```
-
-### 3. Apply required customisations
-Before you start developing, update the following items in your new project:
-
-| Item                        | Where to change                                     | Notes                                           |
-|-----------------------------|-----------------------------------------------------|-------------------------------------------------|
-| Package name                | `src/template_python_lib/` → `src/your_package/`    | Rename the directory and update all references  |
-| Import paths                | All source and test files                           | Replace `template_python_lib` with your package |
-| Package metadata            | `pyproject.toml`, `setup.cfg`                       | Update name, author, description, etc.          |
-| Version                     | `pyproject.toml`, `setup.cfg`                       | Optionally set initial version                  |
-| License                     | `pyproject.toml`, `setup.cfg`, LICENSE              | Choose and update license as needed             |
-| README                      | `README.md`                                         | Update project name and description             |
-| Documentation               | `docs/`                                             | Update Sphinx config and docstrings             |
-
-### 4. Set up your environment
-Set up the necessary packages in an environment of your choice:
-```bash
-<activate_your_environment>
-pip install -e .[dev]
-```
-
-### 5. Run tests to verify setup
-```bash
-pytest
-```
-
----
-
-## 📂 Project structure
-
-```plaintext
-.
-├── src/
-│   └── template_python_lib/       # Your package source code
-├── tests/                         # Test suite
-├── docs/                          # Sphinx documentation source
-├── .github/workflows/             # GitHub Actions CI workflows
-├── .pre-commit-config.yaml        # Pre-commit hooks configuration
-├── pyproject.toml                 # Build system and tool configurations
-├── setup.cfg                     # Package metadata and settings
-├── requirements-dev.txt           # Development dependencies
-└── README.md                     # This file
-```
-
----
-
-## 🛠️ Local development
-
-- Use the `src` layout to avoid import conflicts.
-- Install dev dependencies with `pip install -e .[dev]`.
-- Run tests with `pytest`.
-- Type-check your code with `mypy`.
-- Lint your code with `ruff`.
-
----
-
-## 🎨 Linting & formatting
-
-- **Ruff** handles linting and formatting checks.
-- Run lint checks manually with:
-  ```bash
-  ruff check src tests
-  ```
-
----
-
-## 🔧 Pre-commit hooks
-
-- Pre-commit hooks run automatically before each commit to catch issues early.
-- Set up pre-commit by running:
-  ```bash
-  pre-commit install
-  ```
-- Hooks include:
-  - Ruff linting
-  - Adding trailing whitespaces
-
----
-
-## 📦 Versioning
-
-- Uses **CalVer** (Calendar Versioning) format: `YYYY.MM.PATCH` (e.g., `2025.09.0`).
-- Version is managed with [bump-my-version](https://github.com/callowayproject/bump-my-version).
-- Bump versions with:
-  ```bash
-  bump-my-version patch
-  ```
-  or with the dedicated GitHub action.
-
----
-
-## 📚 Documentation
-
-- Documentation is built with **Sphinx**.
-- Source files are in the `docs/` directory.
-- Ready for hosting on Read the Docs.
-- Build docs locally with:
-  ```bash
-  cd docs
-  make html
-  ```
-
----
-
-## ⚙️ Continuous Integration (CI)
-
-- GitHub Actions workflows automate:
-  - Linting and type-checking.
-  - Running tests on multiple Python versions.
-- Ensures code quality and consistency on every push and pull request.
-
----
-
-## 🤔 Rationale
-
-This template aims to provide a minimal yet modern starting point for Python libraries, incorporating:
-
-- Best practices like the `src` layout to avoid import pitfalls.
-- Automated tooling for testing, linting, formatting, and type checking.
-- Pre-commit hooks to maintain code quality from the start.
-- Clear versioning strategy with CalVer.
-- Documentation setup ready for expansion and publishing.
-
----
-
-## 🤝 Contributing
-
-Contributions are welcome! Please:
-
-- Follow the existing code style and conventions.
-- Run tests and linting before submitting PRs.
-- Use the pre-commit hooks to catch issues early.
-- Update this README as needed.
-
----
-
-Thank you for using this template — happy coding!
+# NPKit

README.md

@@ -10,14 +10,14 @@
 import sys
 import importlib
 
-project = "template-python-lib"
+project = "NPKit"
 try:
-    __version__ = importlib.import_module("template_python_lib").__version__
+    __version__ = importlib.import_module("npkit").__version__
 except Exception:
     __version__ = "0.0.0"
 sys.path.insert(0, os.path.abspath("../../src"))
 
-project = "template-python-lib"
+project = "NPKit"
 copyright = "2025, Jan Lukas Späh"
 author = "Jan Lukas Späh"
 release = __version__

docs/source/conf.py

@@ -1,9 +1,9 @@
-.. CPax documentation master file, created by
+.. NPkit documentation master file, created by
    sphinx-quickstart on Mon Mar 31 23:52:35 2025.
    You can adapt this file completely to your liking, but it should at least
    contain the root `toctree` directive.
 
-CPax documentation
+NPKit documentation
 ==================
 
 Add your content using ``reStructuredText`` syntax. See the

docs/source/index.rst

@@ -0,0 +1,60 @@
+import numpy as np
+from npkit import (
+    Observable,
+    ObservableSet,
+    GaussianModel,
+    GaussianLikelihood,
+)
+from npkit import build_belt, invert_belt
+import matplotlib.pyplot as plt
+from npkit.plot import plot_belt
+
+# Model: two observables
+obs = ObservableSet(
+    [
+        Observable("xsec1", lambda p: 100 + 10 * p["C"] ** 2),
+    ]
+)
+
+V = np.array([100])
+
+model = GaussianModel(obs=obs, covariance=V)
+
+# Observed data (example)
+y_obs = 100
+# data = Combination(names=obs.names, values=y_obs, covariance=V)
+
+
+def like_builder():
+    return GaussianLikelihood(obs, y_obs, V)
+
+
+start = {"C": 0.0}
+# bounds = {"C": (-1e6, 1e6)}
+bounds = None
+rng = np.random.default_rng(123)
+
+# Build a 68% belt
+grid = np.linspace(-2, 2, 51)
+belt = build_belt(
+    param="C",
+    model=model,
+    like_builder=like_builder,
+    grid=grid,
+    n_toys=3000,
+    alpha=1 - 0.6827,
+    rng=rng,
+    start=start,
+    bounds=bounds,
+)
+
+print(belt)
+
+# Invert for observed interval
+interval = invert_belt(belt, like_builder=like_builder, start=start, bounds=bounds)
+print("Neyman CI:", interval)
+
+# Visualize the Neyman belt
+ax = plot_belt(belt)
+ax.set_title("Neyman Belt Visualization")
+plt.show()

examples/minimal_example.py

@@ -0,0 +1,52 @@
+import numpy as np
+from npkit import (
+    Observable,
+    ObservableSet,
+    Combination,
+    GaussianModel,
+    GaussianLikelihood,
+)
+from npkit import build_belt, invert_belt
+
+# Model: two observables
+obs = ObservableSet(
+    [
+        Observable("xsec1", lambda p: 1.0 + 0.4 * p["C"]),
+        Observable("xsec2", lambda p: 0.8 - 0.2 * p["C"]),
+    ]
+)
+
+V = np.array([[0.04**2, 0.5 * 0.04 * 0.05], [0.5 * 0.04 * 0.05, 0.05**2]])
+
+model = GaussianModel(obs=obs, covariance=V)
+
+# Observed data (example)
+y_obs = np.array([1.05, 0.78])
+data = Combination(names=obs.names, values=y_obs, covariance=V)
+
+
+def like_builder():
+    return GaussianLikelihood(obs, y_obs, V)
+
+
+start = {"C": 0.0}
+bounds = {"C": (-2.0, 2.0)}
+rng = np.random.default_rng(123)
+
+# Build a 68% belt
+grid = np.linspace(-2, 2, 161)
+belt = build_belt(
+    param="C",
+    model=model,
+    like_builder=like_builder,
+    grid=grid,
+    n_toys=1000,
+    alpha=1 - 0.6827,
+    rng=rng,
+    start=start,
+    bounds=bounds,
+)
+
+# Invert for observed interval
+interval = invert_belt(belt, like_builder=like_builder, start=start, bounds=bounds)
+print("Neyman CI:", interval)

examples/multiple_observable_example.py

@@ -3,9 +3,9 @@ requires = ["setuptools>=65.5", "wheel"]
 build-backend = "setuptools.build_meta"
 
 [project]
-name = "template-python-lib"
+name = "NPKit"
 version = "2025.09.0"
-description = "template-python-lib: A template repository for modern python packages."
+description = "NPKit: Toolkit for frequentist interpretations and inference."
 authors = [
   { name = "Jan Lukas Späh", email = "[email protected]" }
 ]
@@ -19,7 +19,7 @@ classifiers = [
 ]
 
 dependencies = [
-  "numpy>=2.0",
+  "numpy>=2.0", "scipy>=1.16"
 ]
 
 [project.optional-dependencies]
@@ -28,12 +28,28 @@ dev  = ["bump-my-version>=1.2", "ruff>=0.6", "pre-commit>=3.8", "mypy>=1.11"]
 docs = ["sphinx>=7", "sphinx-rtd-theme", "sphinx-autodoc-typehints", "sphinx-autoapi", "myst-parser"]
 
 [project.urls]
-Homepage = "https://github.com/JaLuka98/template-python-lib"
-Issues   = "https://github.com/JaLuka98/template-python-lib/issues"
-Source   = "https://github.com/JaLuka98/template-python-lib"
+Homepage = "https://github.com/JaLuka98/NPKit"
+Issues   = "https://github.com/JaLuka98/NPKit/issues"
+Source   = "https://github.com/JaLuka98/NPKit"
 
 [tool.setuptools]
 package-dir = {"" = "src"}
 
 [tool.setuptools.packages.find]
 where = ["src"]
+
+[tool.mypy]
+python_version = "3.12"
+strict = true
+exclude = ["^docs/", "^examples/"]
+
+warn_unused_ignores = true
+warn_redundant_casts = true
+warn_unreachable = true
+
+[[tool.mypy.overrides]]
+module = [
+  "scipy.*",
+  "matplotlib.*",
+]
+ignore_missing_imports = true