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examples/019_facts/demo/app/demo.py

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+from flask import Flask
+from flask_sqlalchemy import SQLAlchemy
+import os, socket
+
+app = Flask(__name__)
+app.config['SQLALCHEMY_DATABASE_URI'] = os.environ['DATABASE_URI']
+app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
+db = SQLAlchemy(app)
+hostname = socket.gethostname()
+
+@app.route('/')
+def index():
+  return 'Hello, from sunny %s!\n' % hostname
+
+@app.route('/db')
+def dbtest():
+  return 'Database Connected from %s!\n' % hostname
+
+if __name__ == '__main__':
+  app.run()

examples/019_facts/demo/app/demo.wsgi

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+activate_this = '/var/www/demo/.venv/bin/activate_this.py'
+exec(open(activate_this).read(), {'__file__': activate_this})
+
+import os
+os.environ['DATABASE_URI'] = 'mysql://demo:demo@db01/demo'
+
+import sys
+sys.path.insert(0, '/var/www/demo')
+
+from demo import app as application

examples/019_facts/demo/app/requirements.txt

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+click==7.1.2
+Flask==1.1.4
+Flask-SQLAlchemy==2.5.1
+greenlet==1.1.2
+itsdangerous==1.1.0
+Jinja2==2.11.3
+MarkupSafe==2.0.1
+SQLAlchemy==1.4.32
+Werkzeug==1.0.1