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Python Flask Basics Welcome to Flask View Args Through URL

mike henning
mike henning
1,384 Points

3 of 3 explain

from flask import Flask

app = Flask(__name__)


@app.route('/')
@app.route('/<name>')
def hello(name="treehouse"):
     return 'Hello {}' .format(name)

I need help understanding why now an argument is now just adding a string inside

Def hello(name=“treehouse”):

Instead

Name= request.args.get(name,”treehouse”)

1 Answer

Chris Freeman
MOD
Chris Freeman
Treehouse Moderator 67,464 Points

Hey mike henning, good question.

Once the route ’/<name>’ is added, the function needs to accept an argument from this route. So (name) is added.

However, since the original route ’/‘ is still valid, this will cause an error because this original route will call the function with no arguments when one is now required.

To prevent this missing argument error, a default is defined: (name=“treehouse”)

So, effectively, the route / is automatically turned into /treehouse.

Post back if you need more help. Good luck!!!