python/difference-of-squares: 1st iteration

python/README.md

@@ -43,3 +43,4 @@
 - [reverse-string](./reverse-string/README.md)
 - [roman-numerals](./roman-numerals/README.md)
 - [scrabble-score](./scrabble-score/README.md)
+- [difference-of-squares](./difference-of-squares/README.md)

python/difference-of-squares/.coverage

@@ -0,0 +1 @@
+!coverage.py: This is a private format, don't read it directly!{"arcs":{"/home/vpayno/git_vpayno/exercism-workspace/python/difference-of-squares/test/__init__.py":[[0,0],[0,-1]],"/home/vpayno/git_vpayno/exercism-workspace/python/difference-of-squares/difference_of_squares.py":[[0,1],[1,4],[4,14],[14,24],[24,-1],[24,31],[4,11],[11,-4],[14,21],[21,-14],[31,-24]]}}

python/difference-of-squares/.coverage.xml

@@ -0,0 +1,34 @@
+<?xml version="1.0" ?>
+<coverage branch-rate="1" branches-covered="0" branches-valid="0" complexity="0" line-rate="0.8571" lines-covered="6" lines-valid="7" timestamp="1713242888288" version="4.5.4">
+	<!-- Generated by coverage.py: https://coverage.readthedocs.io -->
+	<!-- Based on https://raw.githubusercontent.com/cobertura/web/master/htdocs/xml/coverage-04.dtd -->
+	<sources>
+		<source>/home/vpayno/git_vpayno/exercism-workspace/python/difference-of-squares</source>
+	</sources>
+	<packages>
+		<package branch-rate="1" complexity="0" line-rate="0.8571" name=".">
+			<classes>
+				<class branch-rate="1" complexity="0" filename="difference_of_squares.py" line-rate="0.8571" name="difference_of_squares.py">
+					<methods/>
+					<lines>
+						<line hits="0" number="0"/>
+						<line hits="1" number="4"/>
+						<line hits="1" number="11"/>
+						<line hits="1" number="14"/>
+						<line hits="1" number="21"/>
+						<line hits="1" number="24"/>
+						<line hits="1" number="31"/>
+					</lines>
+				</class>
+			</classes>
+		</package>
+		<package branch-rate="1" complexity="0" line-rate="1" name="test">
+			<classes>
+				<class branch-rate="1" complexity="0" filename="test/__init__.py" line-rate="1" name="__init__.py">
+					<methods/>
+					<lines/>
+				</class>
+			</classes>
+		</package>
+	</packages>
+</coverage>

python/difference-of-squares/.coveragerc

@@ -0,0 +1,2 @@
+[run]
+omit = __init__.py, *_test.py

python/difference-of-squares/.pylintrc

@@ -0,0 +1 @@
+../.pylintrc

python/difference-of-squares/README.md

@@ -40,4 +40,9 @@ Finding the best algorithm for the problem is a key skill in software engineerin
 
 ### Based on
 
-Problem 6 at Project Euler - https://projecteuler.net/problem=6
+Problem 6 at Project Euler - https://projecteuler.net/problem=6
+
+### My Solution
+
+- [my solution](./difference_of_squares.py)
+- [run-tests](./run-tests-python.txt)

python/difference-of-squares/difference_of_squares.py

@@ -1,10 +1,31 @@
-def square_of_sum(number):
-    pass
+"""Python Difference of Squares Exercism"""
 
 
-def sum_of_squares(number):
-    pass
+def square_of_sum(number: int) -> int:
+    """Calculates the square of sum.
 
+    :param number: int
+    :return: int
+    """
 
-def difference_of_squares(number):
-    pass
+    return (number * (number + 1) // 2) ** 2
+
+
+def sum_of_squares(number: int) -> int:
+    """Calculates the sum of squares.
+
+    :param number: int
+    :return: int
+    """
+
+    return (number * (number + 1) * (2 * number + 1)) // 6
+
+
+def difference_of_squares(number: int) -> int:
+    """Calculates the difference of squares.
+
+    :param number: int
+    :return: int
+    """
+
+    return square_of_sum(number) - sum_of_squares(number)

python/difference-of-squares/difference_of_squares.py,cover

@@ -0,0 +1,31 @@
+> """Python Difference of Squares Exercism"""
+
+
+> def square_of_sum(number: int) -> int:
+>     """Calculates the square of sum.
+
+>     :param number: int
+>     :return: int
+>     """
+
+>     return (number * (number + 1) // 2) ** 2
+
+
+> def sum_of_squares(number: int) -> int:
+>     """Calculates the sum of squares.
+
+>     :param number: int
+>     :return: int
+>     """
+
+>     return (number * (number + 1) * (2 * number + 1)) // 6
+
+
+> def difference_of_squares(number: int) -> int:
+>     """Calculates the difference of squares.
+
+>     :param number: int
+>     :return: int
+>     """
+
+>     return square_of_sum(number) - sum_of_squares(number)

python/difference-of-squares/pytest.ini

@@ -0,0 +1,5 @@
+[pytest]
+pythonpath = .
+addopts = --doctest-modules
+markers =
+    task: exercise task/step