make CPM1D a Python package

CPM1D/.gitignore

@@ -0,0 +1,2 @@
+/build/
+*.egg-info

CPM1D/README.md

@@ -13,3 +13,30 @@ description: This folder contains services to compute the 1D integral
 
 A libraty for collision probability method in 1d reference frames (slab,
 cyclinder and sphere), created by [ndarmage](https://github.com/ndarmage).
+
+# Install (in a virtual environment)
+
+Create an activate a virtual environment:
+
+```sh
+# create virtual env
+python3 -m venv my-virtual-env
+# activate virtual env
+my-virtual-env/bin/activate
+```
+
+Install the package (each time package sources are modified)
+
+```sh
+pip install path_to_this_directory
+```
+
+Use it
+```sh
+python
+```
+```python
+import KinPy.algo609 as algo
+dir(algo)
+['__doc__', '__file__', '__loader__', '__name__', '__package__', '__spec__', '__version__', '_algo609_error', 'bdiff', 'bkias', 'bkisr', 'bskin', 'd1mach', 'dbdiff', 'dbkias', 'dbkisr', 'dbskin', 'dexint', 'dgamrn', 'dhkseq', 'dpsixn', 'dqckin', 'exint', 'fdump', 'gamrn', 'hkseq', 'i1mach', 'j4save', 'psixn', 'qckin', 'r1mach', 's88fmt', 'xerabt', 'xerclr', 'xerctl', 'xerdmp', 'xermax', 'xerprt', 'xerror', 'xerrwv', 'xersav', 'xgetf', 'xgetua', 'xgetun', 'xsetf', 'xsetua', 'xsetun']
+```

CPM1D/pyproject.toml

@@ -0,0 +1,2 @@
+[build-system]
+requires = ["setuptools", "wheel", "numpy"]

CPM1D/setup.py

@@ -0,0 +1,33 @@
+"""from https://numpy.org/doc/stable/f2py/buildtools/distutils.html"""
+from pathlib import Path
+
+from numpy.distutils.core import Extension, setup
+from setuptools import find_packages
+
+
+src_dir = Path('src') # Path allows to be complient wit Linux and Windows
+f_flags = [ # from CPM1D/tools/wrap_f77_to_pylib.sh
+           '-ffixed-line-length-72',
+           '-Wextra',
+           '-Wall',
+           '-std=legacy'
+          ]
+extension = Extension(name='KinPy.algo609',
+                      sources=[str(src_dir / 'KinPy' / 'algo609.f')],
+                      # see https://numpy.org/doc/stable/reference/generated/numpy.distutils.core.Extension.html#numpy.distutils.core.Extension
+                      # for compile options.
+                      extra_f77_compile_args=f_flags,
+                      extra_f90_compile_args=f_flags,
+                      )
+
+setup(name='CPM1D',
+      description=("Services to compute the 1D integral transport"
+                   "equation by the collision probability method"),
+      author="Daniele tomatis",
+      author_email="???",
+      version="0.0.1",
+      ext_modules=[extension,],
+      install_requires = ["setuptools", "wheel", "numpy"],
+      package_dir={"": "src"},  # To install KinPy and all python files in it (requires __init__.py in each subfolders to install)
+      packages=find_packages(where="src"),  # to locate src dir
+      )