add hw4

hw4/Makefile

@@ -0,0 +1,25 @@
+PIP := venv/bin/pip
+PYTHON3 := venv/bin/python3
+TESTS := venv/bin/pytest -v ./test_controllers.py
+
+clear:
+	rm -rf venv
+
+venv:
+	python3 -m venv venv
+
+requirements:
+	${PIP} install -r requirements.txt
+
+setup:
+	make clear
+	make venv
+	make requirements
+
+run:
+	${PYTHON3} server.py
+
+test:
+	${TESTS}
+
+.PHONY: clear venv requirements setup run test

hw4/README.md

@@ -0,0 +1,3 @@
+# mipt_python_back
+
+hw4

hw4/controllers.py

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+def operation(a: int, b: int) -> int|None:
+    if (a == None) or (b == None):
+        return None
+    return a + b

hw4/requirements.txt

@@ -0,0 +1,3 @@
+Flask
+python-dotenv
+pytest

hw4/server.py

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+from flask import Flask, jsonify, request
+from dotenv import dotenv_values
+
+from controllers import operation
+
+
+app = Flask(__name__)
+
+
+@app.route("/")
+def server_info() -> str:
+    return "My server"
+
+
+@app.route("/author")
+def author():
+    author = {
+        "name": "Nikita",
+        "course": 5,
+        "age": 22,
+    }
+    return jsonify(author)
+
+
+@app.route("/sum")
+def runner():
+    a = request.args.get('a', type=int)
+    b = request.args.get('b', type=int)
+    return jsonify({'sum': operation(a, b)})
+
+
+def get_port() -> int:
+    config = dotenv_values(".env")
+    if "PORT" in config:
+        return int(config["PORT"])
+    return 5000
+
+
+if __name__ == "__main__":
+    app.run(host='0.0.0.0', debug=True, port=get_port())

hw4/test_controllers.py

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+import pytest
+from controllers import operation
+
+
+@pytest.mark.parametrize('a, b, expected', [(1, 2, 3), (5, -4, 1), (7, 8, 15)])
+def test_operation(a, b, expected) -> None:
+    received = operation(a, b)
+    assert received == expected