How to find the ip of the client?

Question

Flask

Server: FlASK(python). Hosting: cloud9, how to find out the connection ip?
The request.remote_addr method should return the ip of the connection, and it returns something, but it's not the ip of the client.

Answer 1

from flask import Flask,   request
@app.route('/ip/')
def get_user_ip():
    ip = request.headers.get('X-Real-IP')
    return ip

Answer 2

location / {
   ...
   proxy_set_header X-Real-IP $remote_addr;
   ...
}

In nginx if using on your host.
And then request.remote_addr