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‎flask-connexion-rest-part-1/README.md‎

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# Python REST APIs With Flask, Connexion, and SQLAlchemy – Part 1
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This repository holds the code for part one of the Real Python [Python REST APIs With Flask, Connexion, and SQLAlchemy](https://realpython.com/flask-connexion-rest-api) tutorial series.
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## Real Python Flask REST API – Part 1
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You should first create a virtual environment:
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```console
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$ python -m venv venv
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$ source venv/bin/activate
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```
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Install the pinned dependencies from `requirements.txt`:
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```console
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(venv) $ python -m pip install -r requirements.txt
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```
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Then, navigate into the `rp_flask_api/` folder and start the development web server:
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```console
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(venv) $ cd rp_flask_api
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(venv) $ python app.py
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```
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To see your home page, visit `http://127.0.0.1:8000`. You can find the Swagger UI API documentation on `http://127.0.0.1:8000/api/ui`.
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## Flask Starter
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You can find the _Flask Starter_ files in the `flask_starter/` folder.
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To use the _Flask Starter_, copy the `flask_starter/` folder and rename it to your Flask project name. Open the terminal inside of your project folder, and create a virtual environment:
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```console
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$ python -m venv venv
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$ source venv/bin/activate
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```
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You can then install Flask with `pip`:
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```console
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(venv) $ python -m pip install flask
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```
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You can start your Flask development server by running `app.py` as a script:
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```console
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(venv) $ python app.py
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```
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To see your home page, visit `http://127.0.0.1:8000`.
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## Author
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- **Philipp Acsany**, E-mail: [[email protected]]([email protected])
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## License
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Distributed under the MIT license. See [`LICENSE`](../LICENSE) for more information.

‎flask-connexion-rest-part-1/flask_starter/app.py‎

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from flask import Flask, render_template
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app = Flask(__name__)
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@app.route("/")
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def home():
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return render_template("home.html")
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if __name__ == "__main__":
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app.run(host="0.0.0.0", port=8000, debug=True)

flask-connexion-rest/version_2/templates/home.html renamed to flask-connexion-rest-part-1/flask_starter/templates/home.html

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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<title>Application Home Page</title>
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<title>RP Flask REST API</title>
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</head>
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<body>
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<h2>
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Hello World!
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</h2>
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<h1>
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Hello, World!
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</h1>
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</body>
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</html>
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</html>

‎flask-connexion-rest-part-1/requirements.txt‎

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attrs==22.1.0
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certifi==2022.9.24
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charset-normalizer==2.1.1
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click==8.1.3
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clickclick==20.10.2
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connexion==2.14.1
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Flask==2.2.2
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idna==3.4
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inflection==0.5.1
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itsdangerous==2.1.2
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Jinja2==3.1.2
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jsonschema==4.16.0
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MarkupSafe==2.1.1
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packaging==21.3
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pyparsing==3.0.9
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pyrsistent==0.19.1
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PyYAML==6.0
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requests==2.28.1
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swagger-ui-bundle==0.0.9
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urllib3==1.26.12
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Werkzeug==2.2.2

‎flask-connexion-rest-part-1/rp_flask_api/app.py‎

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import connexion
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from flask import render_template
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app = connexion.App(__name__, specification_dir="./")
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app.add_api("swagger.yml")
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@app.route("/")
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def home():
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return render_template("home.html")
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if __name__ == "__main__":
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app.run(host="0.0.0.0", port=8000, debug=True)

‎flask-connexion-rest-part-1/rp_flask_api/people.py‎

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from datetime import datetime
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from flask import abort, make_response
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def get_timestamp():
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return datetime.now().strftime(("%Y-%m-%d %H:%M:%S"))
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PEOPLE = {
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"Fairy": {
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"fname": "Tooth",
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"lname": "Fairy",
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"timestamp": get_timestamp(),
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},
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"Ruprecht": {
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"fname": "Knecht",
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"lname": "Ruprecht",
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"timestamp": get_timestamp(),
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},
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"Bunny": {
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"fname": "Easter",
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"lname": "Bunny",
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"timestamp": get_timestamp(),
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},
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}
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def read_all():
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return list(PEOPLE.values())
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def create(person):
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lname = person.get("lname")
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fname = person.get("fname", "")
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if lname and lname not in PEOPLE:
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PEOPLE[lname] = {
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"lname": lname,
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"fname": fname,
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"timestamp": get_timestamp(),
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}
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return PEOPLE[lname], 201
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else:
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abort(406, f"Person with last name {lname} already exists")
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def read_one(lname):
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if lname in PEOPLE:
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return PEOPLE[lname]
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else:
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abort(404, f"Person with last name {lname} not found")
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def update(lname, person):
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if lname in PEOPLE:
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PEOPLE[lname]["fname"] = person.get("fname", PEOPLE[lname]["fname"])
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PEOPLE[lname]["timestamp"] = get_timestamp()
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return PEOPLE[lname]
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else:
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abort(404, f"Person with last name {lname} not found")
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def delete(lname):
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if lname in PEOPLE:
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del PEOPLE[lname]
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return make_response(f"{lname} successfully deleted", 200)
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else:
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abort(404, f"Person with last name {lname} not found")

‎flask-connexion-rest-part-1/rp_flask_api/swagger.yml‎

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openapi: 3.0.0
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info:
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title: "RP Flask REST API"
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description: "An API about people and notes"
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version: "1.0.0"
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servers:
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- url: "/api"
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components:
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schemas:
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Person:
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type: "object"
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required:
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- lname
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properties:
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fname:
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type: "string"
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lname:
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type: "string"
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parameters:
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lname:
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name: "lname"
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description: "Last name of the person to get"
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in: path
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required: True
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schema:
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type: "string"
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paths:
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/people:
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get:
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operationId: "people.read_all"
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tags:
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- "People"
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summary: "Read the list of people"
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responses:
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"200":
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description: "Successfully read people list"
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post:
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operationId: "people.create"
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tags:
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- People
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summary: "Create a person"
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requestBody:
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description: "Person to create"
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required: True
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content:
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application/json:
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schema:
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x-body-name: "person"
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$ref: "#/components/schemas/Person"
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responses:
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"201":
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description: "Successfully created person"
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/people/{lname}:
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get:
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operationId: "people.read_one"
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tags:
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- People
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summary: "Read one person"
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parameters:
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- $ref: "#/components/parameters/lname"
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responses:
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"200":
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description: "Successfully read person"
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put:
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tags:
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- People
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operationId: "people.update"
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summary: "Update a person"
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parameters:
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- $ref: "#/components/parameters/lname"
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responses:
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"200":
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description: "Successfully updated person"
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requestBody:
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content:
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application/json:
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schema:
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x-body-name: "person"
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$ref: "#/components/schemas/Person"
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delete:
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tags:
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- People
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operationId: "people.delete"
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summary: "Delete a person"
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parameters:
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- $ref: "#/components/parameters/lname"
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responses:
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"204":
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description: "Successfully deleted person"

flask-connexion-rest/version_3/templates/home.html renamed to flask-connexion-rest-part-1/rp_flask_api/templates/home.html

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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<title>Application Home Page</title>
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<title>RP Flask REST API</title>
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</head>
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<body>
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<h2>
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Hello World!
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</h2>
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<h1>
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Hello, World!
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</h1>
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</body>
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</html>
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</html>

‎flask-connexion-rest-part-2/README.md‎

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This folder contains the bonus material & example projects for our upcoming part 2 of [Building and Documenting Python REST APIs With Flask and Connexion](https://realpython.com/flask-connexion-rest-api/) on Real Python.
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# Python REST APIs With Flask, Connexion, and SQLAlchemy – Part 2
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This repository holds the code for part two of the Real Python [Python REST APIs With Flask, Connexion, and SQLAlchemy](https://realpython.com/flask-connexion-rest-api-part-2) tutorial series.
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## Real Python Flask REST API – Part 2
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You should first create a virtual environment:
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```console
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$ python -m venv venv
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$ source venv/bin/activate
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```
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Install the pinned dependencies from `requirements.txt`:
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```console
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(venv) $ python -m pip install -r requirements.txt
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```
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Then, navigate into the `rp_flask_api/` folder:
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```console
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(venv) $ cd rp_flask_api
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(venv) $ python app.py
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```
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To see your home page, visit `http://127.0.0.1:8000`. You can find the Swagger UI API documentation on `http://127.0.0.1:8000/api/ui`.
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### Optional: Build the Database
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You can build a SQLite database with content by following the commands below.
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Navigate inside the `rp_flask_api/`, enter the [Python interactive shell](https://realpython.com/interacting-with-python/) and run the commands below:
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```pycon
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>>> import sqlite3
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>>> conn = sqlite3.connect("people.db")
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>>> columns = [
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... "id INTEGER PRIMARY KEY",
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... "lname VARCHAR UNIQUE",
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... "fname VARCHAR",
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... "timestamp DATETIME",
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... ]
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>>> create_table_cmd = f"CREATE TABLE person ({','.join(columns)})"
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>>> conn.execute(create_table_cmd)
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>>> people = [
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... "1, 'Fairy', 'Sugar', '2022-10-08 09:15:10'",
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... "2, 'Ruprecht', 'Knecht', '2022-10-08 09:15:13'",
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... "3, 'Bunny', 'Easter', '2022-10-08 09:15:27'",
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... ]
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>>> for person_data in people:
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... insert_cmd = f"INSERT INTO person VALUES ({person_data})"
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... conn.execute(insert_cmd)
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...
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<sqlite3.Cursor object at 0x104ac4dc0>
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<sqlite3.Cursor object at 0x104ac4f40>
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<sqlite3.Cursor object at 0x104ac4fc0>
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>>> conn.commit()
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```
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This will create a database named `people.db` that you can use with your project.
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## Author
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- **Philipp Acsany**, E-mail: [[email protected]]([email protected])
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## License
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Distributed under the MIT license. See [`LICENSE`](../LICENSE) for more information.

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