Help with my first klipper extra

Developers
1 
import requests
from klipper import connect

class dynamicvariables:
    def __init__(self, config):
        self.printer = config.get_printer()
        self.reactor = self.printer.get_reactor()
        self.gcode = self.printer.lookup_object('gcode')
        self.printer.register_event_handler("print_start", self.on_print_start)
        self.metadata = {}

    @classmethod
    def get_moonraker_metadata(cls, filename, moonraker_url="http://localhost:7125"):
        url = f"{moonraker_url}/server/files/metadata?filename={filename}"
        try:
            response = requests.get(url)
            response.raise_for_status()  # Raise an exception for error HTTP statuses

            data = response.json()
            return data['result']
        except requests.exceptions.RequestException as e:
            print(f"Error fetching metadata: {e}")
            return None

    def on_print_start(self, event_time):
        filename = event_time['file']
        self.metadata = self.get_moonraker_metadata(filename)

def load_config(config):
    return dynamicvariables(config)

I have this file saved as “dynamicvariables.py” in the /klipper/klippy/extras folder.
When trying to load it via cfg file, I just receive the following error:

Section 'dynamicvariables' is not a valid config section

What am I doing wrong?

2

no idea what I am talking about, but that’s never stopped me before!

Q: where is ‘config’ defined? What is it supposed to point to?

I’m risking it’s a dumb reply because I truly do not know, but I do not see config being set to anything.

Good luck!

3

Did you restart Klipper via the RESTART command, or with sudo service klipper restart? You need to restart the service (sudo service klipper restart) anytime you modify an extra.

4

Did a full restart of the pi.

5

I’m not sure why that line is there, but it doesn’t seem to be doing anything and may be the cause of an error.

7

removing that line, made no difference