Problem with arguments in route function.

[snippsat]

@app.route has a connection with function under.
Can not take in 1 value from route and have 2 argument in function.
Just to make it clear route is the url in address bar.

@app.route('/user/<user_name>')
def foo(user_name):
    user_name = user_name.capitalize()    
    return render_template('user.html', name=user_name)

Call this would be http://127.0.0.1:5000/user/kent

def foo(user_name, arg): would give your error.

Error:
TypeError: foo() missing 1 required positional argument: 'arg'

There are way to get several parameter from route or maybe you mean to get values from the web-site eg html form.
It more normal/better to keep route(url call) rather simple,if need many argumet do this in web-site.

Look here for some examples multiple parameters in route.