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Flask

How to run​

method 1​

  • app.py file
from flask import Flask

app = Flask(__name__)

@app.route("/")
def index():
    return "hello"
  • mac

    export FLASK_ENV=development && export FLASK_APP=app && flask run

  • windows

    cmd /C "set FLASK_ENV=development && set FLASK_APP=app && flask run"

method 2​

  • app/__init__.py file
from flask import Flask

app = Flask(__name__)

@app.route("/")
def index():
    return "hello"
  • mac

    export FLASK_ENV=development && export FLASK_APP=app && flask run

  • windows

    cmd /C "set FLASK_ENV=development && set FLASK_APP=app && flask run"

method 3​

  • app.py file
from flask import Flask

app = Flask(__name__)

@app.route("/")
def index():
    return "hello"

if __name__ == "__main__":
    app.run(debug=True)
  • mac

    python3 app.py

  • windows

    python app.py

Get parameter data from url​

from flask import Flask, jsonify

app = Flask(__name__)


# method 1
@app.route("/get/<id>")
def get_data(id):
    return jsonify({"id": id})


# method 2
@app.route("/gets/<id>", methods=["GET"])
def gets_data(id):
    return jsonify({"id": id})

Post data​

from flask import Flask, request

app = Flask(__name__)


class Model():
    def __init__(self, name):
        self.id = 1
        self.name = name


@app.route("/post", methods=["POST"])
def post_data():
    new_item = Model(request.json["name"])
    return { "id": new_item.id }