Start to fix packaging

Author: dham

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2020-2022 David A. Ham
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

doc/source/3_objects.rst

@@ -618,7 +618,7 @@ observed that objects of some classes can be added. Is this true for
 
    TypeError: unsupported operand type(s) for +: 'Polynomial' and 'Polynomial'
 
-Of course, once again this is not so surprising since we haven't
+Once again, this is not so surprising since we haven't
 defined what addition of polynomials should mean. The :term:`special
 method` which defines addition is :meth:`~object.__add__`. It takes the
 object itself and another object and returns their sum. That is,    

pyproject.toml

@@ -0,0 +1,15 @@
+[build-system]
+required = ["hatchling"]
+build-backend = "hatchling.build"
+
+[project]
+name = "oo-programming-exercises"
+version = 2022.0
+authors = [
+    { name="David A. Ham", "David.Ham@imperial.ac.uk" },
+]
+description=("Code for Object oriented programming "
+             "in Python for mathematicians.")
+
+[project.urls]
+"Homepage" = "https://object-oriented-python.github.io/"