from flask import Flask

cpt=0
app = Flask(__name__)
@app.route('/')
def index():
    return 'Hello world'
'''
    global cpt
    chaine = 'Hello world cpt='+str(cpt)
    cpt=cpt+1
    return chaine
'''
app.run(debug=True, host='0.0.0.0', port=5000)