Basic flask application with after_request returns server error

Question

from flask import Flask
app = Flask(__name__)
@app.route(\'/\')
def hello():    
    return \"k?\"
@app.after_request
def sendsms():
    pass
if __name__ == \'__main__\'         


        

Answer 1

The documentation is usually a good place to find answers to things like this.

Your function must take one parameter, a response_class object and return a new response object or the same (see process_response()).

Your function does neither of those things.

@app.after_request
def sendsms(response):
    return response