如何使用变量定义目录flask python3

Question

I have this sample code below, when I try to go to / I get a 404 error, I am trying to use variables as app routes but with no luck

from flask import Flask

app = Flask(__name__)

index_dir = "/"

app.route(index_dir)
def index():
    return "hello_world"

if __name__ == '__main__':
    app.run(host="0.0.0.0")

Any idea on how to make python3 variables to directories

Answer 1

You have skipped the decorator symbol ( @ ) before app.route(index_dir) . It should be like this to work:

from flask import Flask

app = Flask(__name__)

index_dir = "/"

@app.route(index_dir)
def index():
    return "hello_world"

if __name__ == '__main__':
    app.run(host="0.0.0.0")