Appelez le ballon de fonction JavaScript
from flask import Flask, render_template
app = Flask(__name__)
@app.route('/', methods=['GET', 'POST'])
def upload_file():
if request.method == 'POST':
#verify if the file is valid
#here invoke js to do something (for example flash("test"))
return render_template('upload.html', flash_message="True")
return render_template('upload.html', flash_message="False")
Huy Nguyen