RaspberryPi #4 Matrix Switch Password Check

import time
import RPi.GPIO as GPIO
GPIO.setwarnings(False)
class keypad():
    def __init__(self,Row,Column):
        GPIO.setmode(GPIO.BCM)
        self.KEYPAD = [
                    [1,2,3,"A"],
                    [4,5,6,"B"],
                    [7,8,9,"C"],
                    ["*",0,"#","D"]
                    ]
        self.ROW    = Row
        self.COLUMN = Column

    def getKey(self):

        # Set all columns as output low
        for j in range(len(self.COLUMN)):
            GPIO.setup(self.COLUMN[j], GPIO.OUT)
            GPIO.output(self.COLUMN[j], GPIO.LOW)

        # Set all rows as input
        for i in range(len(self.ROW)):
            GPIO.setup(self.ROW[i], GPIO.IN, pull_up_down=GPIO.PUD_UP)

        # Scan rows for pushed key/button
        # A valid key press should set "rowVal"  between 0 and 3.
        rowVal = -1
        for i in range(len(self.ROW)):
            tmpRead = GPIO.input(self.ROW[i])
            if tmpRead == 0:
                rowVal = i

        # if rowVal is not 0 thru 3 then no button was pressed and we can exit
        if rowVal <0 or rowVal >3:
            self.exit()
            return

        # Convert columns to input
        for j in range(len(self.COLUMN)):
            GPIO.setup(self.COLUMN[j], GPIO.IN, pull_up_down=GPIO.PUD_DOWN)

        # Switch the i-th row found from scan to output
        GPIO.setup(self.ROW[rowVal], GPIO.OUT)
        GPIO.output(self.ROW[rowVal], GPIO.HIGH)

        # Scan columns for still-pushed key/button
        # A valid key press should set "colVal"  between 0 and 3.
        colVal = -1
        for j in range(len(self.COLUMN)):
            tmpRead = GPIO.input(self.COLUMN[j])
            if tmpRead == 1:
                colVal=j

        # if colVal is not 0 thru 3 then no button was pressed and we can exit
        if colVal <0 or colVal >3:
            self.exit()
            return

        # Return the value of the key pressed
        self.exit()
        return self.KEYPAD[rowVal][colVal]

    def exit(self):
        # Reinitialize all rows and columns as input at exit
        for i in range(len(self.ROW)):
            GPIO.setup(self.ROW[i], GPIO.IN, pull_up_down=GPIO.PUD_UP)
        for j in range(len(self.COLUMN)):
            GPIO.setup(self.COLUMN[j], GPIO.IN, pull_up_down=GPIO.PUD_UP)

kp = keypad(Row=[21,20,16,7],Column=[26,19,13,6])
st_press=0
digit_str=''
x=0
import RPi.GPIO as GPIO
import time
from datetime import datetime
GPIO.setwarnings(False)
GPIO.setmode(GPIO.BCM)
GPIO.setup(24,GPIO.OUT)
blink = GPIO.PWM(24,500)
blink.start(0)
import time
from neopixel import *
import time
import Adafruit_SSD1306

from PIL import Image,ImageDraw,ImageFont

# Raspberry Pi pin configuration:
RST = 1

# 128x64 display with hardware I2C:
disp = Adafruit_SSD1306.SSD1306_128_64(rst=RST)

# Note you can change the I2C address by passing an i2c_address parameter like:
# disp = Adafruit_SSD1306.SSD1306_128_64(rst=RST, i2c_address=0x3C)

# Initialize library.
disp.begin()
# Clear display.
disp.clear()
# LED strip configuration:
LED_COUNT      = 1       # Number of LED pixels.
LED_PIN        = 12      # GPIO pin connected to the pixels (must support PWM!).
LED_FREQ_HZ    = 800000  # LED signal frequency in hertz (usually 800khz)
LED_DMA        = 5       # DMA channel to use for generating signal (try 5)
LED_BRIGHTNESS = 255     # Set to 0 for darkest and 255 for brightest
LED_INVERT     = False
strip = Adafruit_NeoPixel(LED_COUNT, LED_PIN, LED_FREQ_HZ, LED_DMA, LED_INVERT, LED_BRIGHTNESS)
    # Intialize the library (must be called once before other functions).
strip.begin()
while 1:
    # Loop while waiting for a keypress
    digit = None
    digit = kp.getKey()
    if digit == None:
        st_press=1
        blink.ChangeDutyCycle(0)
        strip.setPixelColor(0, Color(0, 0,0))
        strip.show()
        width = disp.width
        height = disp.height
        image = Image.new('1', (width, height))
        draw = ImageDraw.Draw(image)
        font = ImageFont.truetype('VCR_OSD_MONO_1.001.ttf',22)
        draw.text((0,0), '           ',font=font, fill=1)
        draw.text((0,20), '             ',font=font, fill=1)
        draw.text((0,40), '           ',font=font, fill=1)
        disp.image(image)
        disp.display()
    else:
        if st_press:
            blink.ChangeDutyCycle(50)
            # Print the result
            x+=1
            digit_str+=str(digit)
            print (digit_str,end='\r')
            st_press=0
            time.sleep(0.3)
            blink.ChangeDutyCycle(0)
            if x==4:
                if digit_str=="4096":
                    width = disp.width
                    height = disp.height
                    image = Image.new('1', (width, height))
                    draw = ImageDraw.Draw(image)
                    font = ImageFont.truetype('VCR_OSD_MONO_1.001.ttf',22)
                    draw.text((0,0), 'Ironman',font=font, fill=1)
                    disp.image(image)
                    disp.display()
                    strip.setPixelColor(0, Color(0, 0, 255))# Red
                    strip.show()
                    digit_str=''
                    x=0
                    time.sleep(1)
                elif digit_str=="2048":
                    width = disp.width
                    height = disp.height
                    image = Image.new('1', (width, height))
                    draw = ImageDraw.Draw(image)
                    font = ImageFont.truetype('VCR_OSD_MONO_1.001.ttf',22)
                    draw.text((0,0), 'Antman',font=font, fill=1)
                    disp.image(image)
                    disp.display()
                    strip.setPixelColor(0, Color(0,255,0))# Red
                    strip.show()
                    digit_str=''
                    x=0
                    time.sleep(1)
                else:
                    width = disp.width
                    height = disp.height
                    image = Image.new('1', (width, height))
                    draw = ImageDraw.Draw(image)
                    font = ImageFont.truetype('VCR_OSD_MONO_1.001.ttf',18)
                    draw.text((0,0), 'Access denind',font=font, fill=1)
                    disp.image(image)
                    disp.display()
                    strip.setPixelColor(0, Color(255,0,0))# Red
                    strip.show()
                    digit_str=''
                    x=0
                    time.sleep(1)