Here is my code

import os, sys, io
import M5
from M5 import *
from hardware import *
from unit import *

label1 = None
title0 = None
label2 = None
label3 = None
label4 = None
label5 = None
label6 = None
label7 = None
label8 = None
label9 = None
label11 = None
label12 = None
label13 = None
label10 = None
label14 = None
label15 = None
label16 = None
label17 = None
label18 = None
label19 = None
label20 = None
label21 = None
label22 = None
label23 = None
label24 = None
label25 = None
label26 = None
label27 = None
label28 = None
i2c0 = None
encoder8_0 = None

btnNo = None
btn = None
val = None

Describe this function...

def dosomething(btnNo):
global btn, val, label1, title0, label2, label3, label4, label5, label6, label7, label8, label9, label11, label12, label13, label10, label14, label15, label16, label17, label18, label19, label20, label21, label22, label23, label24, label25, label26, label27, label28, i2c0, encoder8_0
if btnNo == 1:
btn = encoder8_0.get_button_status(btnNo)
val = encoder8_0.get_counter_value(btnNo)
label11.setText(str((str(btn))))
label21.setText(str((str(val))))
if btnNo == 2:
btn = encoder8_0.get_button_status(btnNo)
val = encoder8_0.get_counter_value(btnNo)
label12.setText(str((str(btn))))
label22.setText(str((str(val))))
if btnNo == 3:
btn = encoder8_0.get_button_status(btnNo)
val = encoder8_0.get_counter_value(btnNo)
label13.setText(str((str(btn))))
label23.setText(str((str(val))))
if btnNo == 4:
btn = encoder8_0.get_button_status(btnNo)
val = encoder8_0.get_counter_value(btnNo)
label14.setText(str((str(btn))))
label24.setText(str((str(val))))
if btnNo == 5:
btn = encoder8_0.get_button_status(btnNo)
val = encoder8_0.get_counter_value(btnNo)
label15.setText(str((str(btn))))
label25.setText(str((str(val))))
if btnNo == 6:
btn = encoder8_0.get_button_status(btnNo)
val = encoder8_0.get_counter_value(btnNo)
label16.setText(str((str(btn))))
label26.setText(str((str(val))))
if btnNo == 7:
btn = encoder8_0.get_button_status(btnNo)
val = encoder8_0.get_counter_value(btnNo)
label17.setText(str((str(btn))))
label27.setText(str((str(val))))
if btnNo == 8:
btn = encoder8_0.get_button_status(btnNo)
val = encoder8_0.get_counter_value(btnNo)
label18.setText(str((str(btn))))
label28.setText(str((str(val))))

def setup():
global label1, title0, label2, label3, label4, label5, label6, label7, label8, label9, label11, label12, label13, label10, label14, label15, label16, label17, label18, label19, label20, label21, label22, label23, label24, label25, label26, label27, label28, i2c0, encoder8_0, btn, btnNo, val

i2c0 = I2C(0, scl=Pin(1), sda=Pin(2), freq=100000)
encoder8_0 = ENCODER8(i2c0, 0x41)
M5.begin()
Widgets.fillScreen(0xffe834)
label1 = Widgets.Label("#1", 25, 50, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu12)
title0 = Widgets.Title("Encoder Test", 3, 0xFFFFFF, 0x0000FF, Widgets.FONTS.DejaVu18)
label2 = Widgets.Label("#2", 25, 69, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu12)
label3 = Widgets.Label("#3", 25, 92, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu12)
label4 = Widgets.Label("#4", 25, 116, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu12)
label5 = Widgets.Label("#5", 25, 141, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu12)
label6 = Widgets.Label("#6", 25, 166, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu12)
label7 = Widgets.Label("#7", 25, 189, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu12)
label8 = Widgets.Label("#8", 25, 215, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu12)
label9 = Widgets.Label("Btn", 24, 34, 1.0, 0x000008, 0xf1e68d, Widgets.FONTS.DejaVu12)
label11 = Widgets.Label("Text", 108, 50, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu12)
label12 = Widgets.Label("Text", 108, 68, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu12)
label13 = Widgets.Label("Text", 108, 95, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu12)
label10 = Widgets.Label("v1.0", 277, 1, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu18)
label14 = Widgets.Label("Text", 108, 120, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu12)
label15 = Widgets.Label("Text", 108, 143, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu12)
label16 = Widgets.Label("Text", 108, 166, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu12)
label17 = Widgets.Label("Text", 108, 189, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu12)
label18 = Widgets.Label("Text", 108, 215, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu12)
label19 = Widgets.Label("Text", 365, -164, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu18)
label20 = Widgets.Label("Text", 328, -105, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu18)
label21 = Widgets.Label("Text", 181, 52, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu12)
label22 = Widgets.Label("Text", 181, 70, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu12)
label23 = Widgets.Label("Text", 181, 95, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu12)
label24 = Widgets.Label("Text", 181, 120, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu12)
label25 = Widgets.Label("Text", 180, 145, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu12)
label26 = Widgets.Label("Text", 180, 166, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu12)
label27 = Widgets.Label("Text", 180, 189, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu12)
label28 = Widgets.Label("Text", 180, 215, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu12)

def loop():
global label1, title0, label2, label3, label4, label5, label6, label7, label8, label9, label11, label12, label13, label10, label14, label15, label16, label17, label18, label19, label20, label21, label22, label23, label24, label25, label26, label27, label28, i2c0, encoder8_0, btn, btnNo, val
M5.update()
dosomething(1)
dosomething(2)
dosomething(3)
dosomething(4)
dosomething(5)
dosomething(6)
dosomething(7)
dosomething(8)

if name == 'main':
try:
setup()
while True:
loop()
except (Exception, KeyboardInterrupt) as e:
try:
from utility import print_error_msg
print_error_msg(e)
except ImportError:
print("please update to latest firmware")

Im using uiflow 2.0 alpha 19 with cores3