Press To Switch

import RPi.GPIO as GPIO
from PIL import Image,ImageFont
from datetime import datetime
from luma.core.render import canvas
from luma.core.interface.serial import i2c
from luma.core.virtual import terminal
from luma.oled.device import sh1106
import re,os,time

GPIO.setmode(GPIO.BCM)
GPIO.setup(12,GPIO.IN,pull_up_down=GPIO.PUD_DOWN)
GPIO.setup(16,GPIO.IN,pull_up_down=GPIO.PUD_DOWN)

display=-1
def display_time():
    today_last_time = "Unknown"
    now = datetime.now().time()
    today_date = now.strftime("%d %b %Y")
    today_time = now.strftime("%H:%M:%S")
    if today_time != today_last_time:
        today_last_time = today_time
        with canvas(device) as draw:
            now = datetime.now()
            today_date = now.strftime("%d %b %Y")
            font=ImageFont.truetype('DejaVuSerif-Bold.ttf',24)
            x_pos=(device.width/2)-58
            y_pos=2+(device.height-12)/2-(35/2)
            draw.text((x_pos,y_pos),today_time,font=font,fill=255)
            x_pos=(device.width/2)-33
            y_pos=device.height-10
            draw.text((x_pos,y_pos),today_date,fill=255)
    time.sleep(0.1)


def welcome():
    img_path = os.path.abspath(os.path.join(os.path.dirname(__file__),'pi_logo.png'))
    logo = Image.open(img_path).convert("RGBA")
    fff = Image.new(logo.mode, logo.size, (255,) * 4)

    background = Image.new("RGBA", device.size, "white")
    posn = ((device.width - logo.width) // 2, 0)
    
    background.paste(logo, posn)
    device.display(background.convert(device.mode))
 

def prezentare():
    term=terminal(device)
    term.println("Proiect SM")
    term.println("----------")
    term.println("Hancu Anda-Ioana")
    term.println("Crut Andreea-Diana")
    
    
def display_network():
    ipaddress=os.popen("ifconfig wlan0 | grep 'inet ' | awk -F: '{print $1}'").read()
    ipaddress=re.sub(' +',' ',ipaddress)
    ipaddress=ipaddress.split(' ')
    inet="IP:"+" "+ipaddress[2]
    subnet="NM:"+" "+ipaddress[4]
    broadcast="BC:"+" "+ipaddress[6]

    with canvas(device) as draw:
        draw.text((0,0),inet,fill=255)
        draw.text((0,20),subnet,fill=255)
        draw.text((0,40),broadcast,fill=255)
        
serial=i2c(port=1,address=0x3C)
device=sh1106(serial,rotate=0)
device.clear()

while True:
    if(GPIO.input(12)):
        display+=1
        if(display>4):
            display=0
    elif(GPIO.input(16)):
        display-=1
    if(display==0):
        display+=1
        prezentare()
    elif(display ==1):
        welcome()
    elif(display==2):
        display_time()
    elif(display==3):
        display_network()
    time.sleep(0.1)