Creating RESTful APIs using Flask and Python¶
Medium Article Link: https://medium.com/p/655bad51b24¶
Minimal Flask App¶
from flask import Flask
app = Flask(__name__)
@app.route('/hello/', methods=['GET', 'POST'])
def welcome():
return "Hello World!"
if __name__ == '__main__':
app.run(host='0.0.0.0', port=105)
Variable Rules¶
from flask import Flask
app = Flask(__name__)
@app.route('/<int:number>/')
def incrementer(number):
return "Incremented number is " + str(number+1)
@app.route('/<string:name>/')
def hello(name):
return "Hello " + name
app.run()
Return JSON Serializable Output¶
from flask import jsonify
@app.route('/person/')
def hello():
return jsonify({'name':'Jimit',
'address':'India'})
from flask import jsonify
@app.route('/numbers/')
def print_list():
return jsonify(list(range(5)))
Redirection Behaviour¶
@app.route('/home/')
def home():
return "Home page"
@app.route('/contact')
def contact():
return "Contact page"
Return Status Code¶
@app.route('/teapot/')
def teapot():
return "Would you like some tea?", 418
Before Request¶
@app.before_request
def before():
print("This is executed BEFORE each request.")
@app.route('/hello/')
def hello():
return "Hello World!"
Blueprints¶
home.py¶
from flask import Blueprint
home_bp = Blueprint('home', __name__)
@home_bp.route('/hello/')
def hello():
return "Hello from Home Page"
contact.py¶
from flask import Blueprint
contact_bp = Blueprint('contact', __name__)
@contact_bp.route('/hello/')
def hello():
return "Hello from Contact Page"
app.py¶
from flask import Flask
from home import home_bp
from contact import contact_bp
app = Flask(__name__)
app.register_blueprint(home_bp, url_prefix='/home')
app.register_blueprint(contact_bp, url_prefix='/contact')
app.run()
Logging¶
app.logger.debug('This is a DEBUG message')
app.logger.info('This is an INFO message')
app.logger.warning('This is a WARNING message')
app.logger.error('This is an ERROR message')