fan.py

#!/usr/bin/python3
import tkinter as tk
import subprocess
from time import sleep
from threading import Thread


def get_info():
    info_lines = subprocess.check_output("sensors").decode("utf-8").split("\n")
    result = []
    count = 0
    for i in info_lines:
        if "Core" in i:
            result.append("Core %d: " % count + i.split(":")[-1].split("(")[0].strip())
            count += 1

        if "fan" in i:
            result.append("Fan : " + i.split(":")[-1].strip())

    return result


def set_speed(speed=None):
    """
    Set speed of fan by changing level at /proc/acpi/ibm/fan
    speed: 0-7, auto, disengaged, full-speed
    """
    print("set level to %r" % speed)
    return subprocess.check_output(
        'echo level {0} | sudo tee "/proc/acpi/ibm/fan"'.format(speed),
        shell=True
    ).decode()


class MainApplication(tk.Frame):
    def __init__(self, parent, *args, **kwargs):
        tk.Frame.__init__(self, parent, *args, **kwargs)
        self.parent = parent
        self.parent.minsize(width=100, height=100)

        main_label = tk.Label(parent, text="")
        main_label.grid(row=0, column=0)

        row1 = tk.Frame()
        row1.grid()
        for i in range(8):
            tk.Button(row1, text=str(i), command=lambda x=i: set_speed(x)).grid(
                row=0, column=i + 1
            )

        row2 = tk.Frame()
        row2.grid()

        tk.Button(row2, text="Auto", command=lambda: set_speed("auto")).grid(
            row=0, column=0
        )
        tk.Button(row2, text="Full", command=lambda: set_speed("full-speed")).grid(
            row=0, column=1
        )

        def display_loop():
            while True:
                sleep(0.5)
                main_label["text"] = "\n".join(get_info())

        Thread(target=display_loop).start()


if __name__ == "__main__":
    root = tk.Tk()
    root.title("Thinkfan Control")
    MainApplication(root).grid()
    root.mainloop()