Program to join Class 1.0

import webbrowser
import sys as system
from os import system as sys
from time import sleep
import datetime #Importing all necessary Modules required for program
x = datetime.datetime.now()
a=["Java","Java-Lab","OS","Unix","DBMS","DBMS-LAB","English","Kannada","CN"]#Setting up Subjects to be displayed
links=["https://trimurl.co/3CGlxF","https://trimurl.co/L0JHyM","https://trimurl.co/cm7wEP","https://trimurl.co/DYBRhW","https://trimurl.co/tuOTd1","https://trimurl.co/SRbwm1","https://trimurl.co/5HG6X7","https://trimurl.co/40KwHl","https://trimurl.co/oduL2S"]#Links are used to join the classes of corresponding classes

while(True):#Infite loop so program can run until user wants to...
    sys("cls")
    print("Which Class do you want to join?")
    sno = 1
    for i in a:
        print("{}.{}".format(sno, i))  # Printing Subjects that are present in variable 'a'
        sno += 1
    print("10.Exit")  # Displayed at last
    select=int(input("Enter Your choice:"))
    if(select==1):
        print("Do you want to schedule When to join?(Y/N)(y/n):")
        sec=input()
        if(sec=="y" or sec=="Y"):#If statements to determine correct decisions:
            print("After how much mins u want to join class? (in Mins):")
            rem=int(input())
            print(x.strftime("%I:%M %p"), end=" ")
            print("Joining Java Class in {} mins".format(rem))
            sleep(rem*60)#Sleep Function takes only seconds as inputs so multiplied 'rem' with 60
            sys("cls")
            webbrowser.open(links[select - 1])#Function which will accurately opens class in web browser
        else:
            print(x.strftime("%I:%M %p"), end=" ")
            print("Joining Java Class")
            webbrowser.open(links[select-1])
            sleep(1)
            sys("cls")
    elif select==2:
        print("Do you want to schedule when to join?(Y/N)(y/n):")
        sec=input()
        if (sec == "y" or sec == "Y"):
            print("After how much mins u want to join class? (in Mins):")
            rem = int(input())
            print(x.strftime("%I:%M %p"), end=" ")
            print("Joining Java Lab in {} mins".format(rem))
            sleep(rem * 60)
            sleep(1)
            sys("cls")
            webbrowser.open(links[select - 1])
        else:
            print(x.strftime("%I:%M %p"), end=" ")
            print("Joining Java-Lab")
            webbrowser.open(links[select-1])
            sleep(1)
            sys("cls")
    elif select==3:
        print("Do you want to schedule when to join?(Y/N)(y/n):")
        sec = input()
        if (sec == "y" or sec == "Y"):
            print("After how much mins u want to join class? (in Mins):")
            rem = int(input())
            print(x.strftime("%I:%M %p"), end=" ")
            print("Joining OS in {} mins".format(rem))
            sleep(rem * 60)
            sleep(1)
            sys("cls")
            webbrowser.open(links[select - 1])
        else:
            print(x.strftime("%I:%M %p"), end=" ")
            print("Joining OS")
            webbrowser.open(links[select - 1])
            sleep(1)
            sys("cls")
    elif select==4:
        print("Do you want to schedule when to join?(Y/N)(y/n):")
        sec = input()
        if (sec == "y" or sec == "Y"):
            print("After how much mins u want to join class? (in Mins):")
            rem = int(input())
            print(x.strftime("%I:%M %p"), end=" ")
            print("Joining UNIX  in {} mins".format(rem))
            sleep(rem * 60)
            sleep(1)
            sys("cls")
            webbrowser.open(links[select - 1])

        else:
            print(x.strftime("%I:%M %p"), end=" ")
            print("Joining UNIX")
            webbrowser.open(links[select - 1])
    elif select==5:
        print("Do you want to schedule when to join?(Y/N)(y/n):")
        sec = input()
        if (sec == "y" or sec == "Y"):
            print("After how much mins u want to join class? (in Mins):")
            rem = int(input())
            print(x.strftime("%I:%M %p"), end=" ")
            print("Joining DBMS in {} mins".format(rem))
            sleep(rem * 60)
            sleep(1)
            sys("cls")
            webbrowser.open(links[select - 1])
        else:
            print(x.strftime("%I:%M %p"), end=" ")
            print("Joining DBMS")
            webbrowser.open(links[select - 1])
            sleep(1)
            sys("cls")
    elif select==6:
        print("Do you want to schedule when to join?(Y/N)(y/n):")
        sec = input()
        if (sec == "y" or sec == "Y"):
            print("After how much mins u want to join class? (in Mins):")
            rem = int(input())
            print(x.strftime("%I:%M %p"), end=" ")
            print("Joining DBMS Lab in {} mins".format(rem))
            sleep(rem * 60)
            sleep(1)
            sys("cls")
            webbrowser.open(links[select - 1])
        else:
            print(x.strftime("%I:%M %p"), end=" ")
            print("Joining DBMS-Lab")
            sleep(1)
            sys("cls")
            webbrowser.open(links[select - 1])
    elif select==7:
        print("Do you want to schedule when to join?(Y/N)(y/n):")
        sec = input()
        if (sec == "y" or sec == "Y"):
            print("After how much mins u want to join class? (in Mins):")
            rem = int(input())
            print(x.strftime("%I:%M %p"), end=" ")
            print("Joining English in {} mins".format(rem))
            sleep(rem * 60)
            sleep(1)
            sys("cls")
            webbrowser.open(links[select - 1])
        else:
            print(x.strftime("%I:%M %p"), end=" ")
            print("Joining English Class")
            webbrowser.open(links[select - 1])
            sleep(1)
            sys("cls")
    elif select==8:
        print("Do you want to schedule when to join?(Y/N)(y/n):")
        sec = input()
        if (sec == "y" or sec == "Y"):
            print("After how much mins u want to join class? (in Mins):")
            rem = int(input())
            print(x.strftime("%I:%M %p"), end=" ")
            print("Joining Kannada Class in {} mins".format(rem))
            sleep(rem * 60)
            sleep(1)
            sys("cls")
            webbrowser.open(links[select - 1])
        else:
            print(x.strftime("%I:%M %p"), end=" ")
            print("Joining Kannada Class")
            sleep(1)
            sys("cls")
            webbrowser.open(links[select - 1])
    elif select==9:
        print("Do you want to schedule when to join?(Y/N)(y/n):")
        sec = input()
        if (sec == "y" or sec == "Y"):
            print("After how much mins u want to join class? (in Mins):")
            rem = int(input())
            print(x.strftime("%I:%M %p"), end=" ")
            print("Joining Computer Networking Class in {} mins".format(rem))
            sleep(rem * 60)
            sleep(1)
            sys("cls")
            webbrowser.open(links[select - 1])
        else:
            print(x.strftime("%I:%M %p"), end=" ")
            print("Joining Computer Networking Class")
            sleep(1)
            sys("cls")
            webbrowser.open(links[select - 1])
    elif select==10:
        print("Execution of program Stopped\n Closing Program in 3 Seconds")
        sleep(2)
        system.exit()#Exits program After 3 seconds of selecting option to exit.
    else:
        print(x.strftime("%I:%M %p"), end=" ")
        print("Try Again with Option")
        sys('cls')#Clears the user screen if user enters wrong option.