[Tutor] Format problem

[P L]

Hello, I'm currently doing the Google Coursera python program and I have a question in regard to the code below. I'm not sure why the __str__(self) is not working as intended. All my outputs are not at the nearest hundredth. Thanks for your time.

import random

class Server:
    def __init__(self):
        """Creates a new server instance, with no active connections."""
        self.connections = {}

    def add_connection(self, connection_id):
        """Adds a new connection to this server."""
        # Add the connection to the dictionary with the calculated load
        connection_load = random.random()*10+1
        self.connections[connection_id]= connection_load


    def close_connection(self, connection_id):
        """Closes a connection on this server."""
        # Remove the connection from the dictionary
        del self.connections[connection_id]


    def load(self):
        """Calculates the current load for all connections."""
        # Add up the load for each of the connections
        total = 0
        for connect in self.connections.values():
            total += connect
        return total

    def __str__(self):
        """Returns a string with the current load of the server"""
        return "{:.2f}%".format(self.load())

server = Server()
server.add_connection("192.168.1.1")
print(server.load())