add python interface crate #57

.python-version

@@ -0,0 +1 @@
+rust

members/libpt-py/.gitignore

@@ -0,0 +1,72 @@
+/target
+
+# Byte-compiled / optimized / DLL files
+__pycache__/
+.pytest_cache/
+*.py[cod]
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+.venv/
+env/
+bin/
+build/
+develop-eggs/
+dist/
+eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+include/
+man/
+venv/
+*.egg-info/
+.installed.cfg
+*.egg
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+pip-selfcheck.json
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.coverage
+.cache
+nosetests.xml
+coverage.xml
+
+# Translations
+*.mo
+
+# Mr Developer
+.mr.developer.cfg
+.project
+.pydevproject
+
+# Rope
+.ropeproject
+
+# Django stuff:
+*.log
+*.pot
+
+.DS_Store
+
+# Sphinx documentation
+docs/_build/
+
+# PyCharm
+.idea/
+
+# VSCode
+.vscode/
+
+# Pyenv
+.python-version

members/libpt-py/Cargo.toml

@@ -1,18 +1,12 @@
 [package]
 name = "libpt-py"
-publish.workspace = true
-version.workspace = true
-edition.workspace = true
-authors.workspace = true
-license.workspace = true
-description.workspace = true
-readme.workspace = true
-homepage.workspace = true
-repository.workspace = true
-keywords.workspace = true
-categories.workspace = true
+version = "0.3.11"
+edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+[lib]
+name = "libpt"
+crate-type = ["cdylib"]
 
 [dependencies]
-pyo3 = { version = "0.20.3", features = ["full"] }
+pyo3 = { version = "0.19.0", features = ["full", "extension-module"] }

members/libpt-py/pyproject.toml

@@ -0,0 +1,16 @@
+[build-system]
+requires = ["maturin>=1.1,<2.0"]
+build-backend = "maturin"
+
+[project]
+name = "libpt"
+requires-python = ">=3.7"
+classifiers = [
+    "Programming Language :: Rust",
+    "Programming Language :: Python :: Implementation :: CPython",
+    "Programming Language :: Python :: Implementation :: PyPy",
+]
+
+
+[tool.maturin]
+features = ["pyo3/extension-module"]

members/libpt-py/src/lib.rs

@@ -0,0 +1,15 @@
+use pyo3::prelude::*;
+
+/// Formats the sum of two numbers as string.
+#[pyfunction]
+fn sum_as_string(a: usize, b: usize) -> PyResult<String> {
+    Ok((a + b).to_string())
+}
+
+/// A Python module implemented in Rust.
+#[pymodule]
+#[pyo3(name="libpt")]
+fn libpt_py(_py: Python, m: &PyModule) -> PyResult<()> {
+    m.add_function(wrap_pyfunction!(sum_as_string, m)?)?;
+    Ok(())
+}