Bin/Dec/Hex Converter

ConvInt.py

use = True
import os
import time
from sys import platform

def bannerwin():
    print("                                        ")
    print(".oPYo.                     o         o  ")
    print("8    8                     8         8  ")
    print("8      .oPYo. odYo. o    o 8 odYo.  o8P ")
    print("8      8    8 8' `8 Y.  .P 8 8' `8   8  ")
    print("8    8 8    8 8   8 `b..d' 8 8   8   8  ")
    print("`YooP' `YooP' 8   8  `YP'  8 8   8   8  ")
    print(":.....::.....:..::..::...::....::..::..:")
    print("::::::::::::::::::::::::::::::::::::::::")
    print("::::::::::::::::::::::::::::::::::::::::")
    print("ConvInt, found on github.com/georgeomnet\n")

def clearcheck():
    if "win" in platform.lower() or platform == "darwin":
        print("========================================================\n")
    else:
        os.system("clear")

def errormessagelater():
        print("Sorry! That wasn't a valid answer.")
        time.sleep(1)
        use = True
        clearcheck()
        
def runden():
    usernum = input("Enter your denary number: ")
    try:
        print("Here are the stats for %s:" % usernum)
        print("Its hexadecimal is:",format(int(usernum), '02X'))
        print("Its binary is:","{0:b}".format(int(usernum)))
        print("Its octal decimal is:",oct(int(usernum)))
    except:
        print("Sorry, that number is not valid.")
        runden()
    
def runbin():
    usernum  = input("Enter your binary number: ")
    try:
        print("Here are the stats for %s:" % usernum)
        print("Its denary is:",int(usernum, 2))
        print("Its hexadecimal is:",format(int(usernum), '02X')) 
        print("Its octal decimal is:",oct(int(usernum)))
    except:
        print("Sorry, that number is not valid.")
        runbin()

def runhex():
    usernum = input("Enter your hexadecimal number: ")
    try:
        print("Here are the stats for %s:" % usernum)
        print("Its denary is:",int(usernum, 16))
        print("Its binary is:",bin(int(usernum, 16))[2:])
        print("Its octal decimal is:",oct(int(usernum, 16)))
    except:
        print("Sorry, that is not a valid hex.")
        runhex()


def runoct():
    usernum = input("Enter your octal decimal: ")
    try:
        print("Here are the stats for %s" % usernum)
        print("Its denary is:",int(usernum, 8))
        print("Its binary is:",bin(int(usernum, 8))[2:])
        print("Its hexadecimal is:",format(int(int(usernum, 8)), '02x'))
    except:
        print("Sorry, that oct is not valid.")
        runoct()

def prog():
    typeofchar = input("Is your number Denary (d), Binary (b), Hexadecimal (h) or Octal decimal (o)?\n")
    typeofchar = typeofchar.lower()
    typeofchar = typeofchar[0]
    if typeofchar == "d":
        runden()
    elif typeofchar == "b":
        runbin()
    elif typeofchar == "h":
        runhex()
    elif typeofchar == "o":
        runoct()
    else:
        print("Sorry! Your number is not valid.")

while use == True:
    bannerwin()
    prog()
    ask = input("Would you like to go again? y/n\n")
    try:
        ask = ask[0]
        ask = ask.lower()
    except:
        errormessagelater()
    if ask == "n":
        use = False
    elif ask == "y":
        use = True
        clearcheck()
    else:
        errormessagelater()