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Python Flask Basics Welcome to Flask Request args

Posted by felixwin
felixwin
14,939 Points

'/' gave a none 200 response

why is it, that my code gave a "none 200 response", even if I copied Kenneth's code, except the server starting (app.run(...) ), what as far as I understand isn't necessary.

flask_app.py 
from flask import Flask
from flask import request
app = Flask(__name__)

@app.route("/index")
def index(name = "Hodor"):
    name = request.arg.get("name", name)
    return "Hello {name}".format(name)

1 Answer

felixwin
felixwin
14,939 Points

Ok, first of all, thank you for your Answer!

I found my mistake: its a misunderstanding of the .format()-methode right after the return in quotes stands "Hello {name}".format(name) that is wrong. The right solution to that Problem is leaving the curlys empty: "Hello {}".format(name)

thanks for your Time =)

Michael Hulet
Michael Hulet
47,912 Points
Michael Hulet
Michael Hulet
47,912 Points

Wow, I totally overlooked that. Sorry about that! I missed that because Python 3.6 (the current latest version, and the one that's been my daily driver for a few months now) and later have "f strings". Python will evaluate whatever expression you want inside those brackets, so your statement would be perfectly valid without the call to format. In fact, if you're using Python 3.6 on your machine (which you should be), you should try it out!:

return f"Hello {name}" # This is the entire statement in 3.6