Discount Wiz - first program I ever wrote.

discount.py

# This is the first program I ever wrote.
# I never expected anyone to support me for writing it.  ... But hey I tried.


#------------------------------DISCOUNT WIZ---------------------------

def op(): # ask for and set original price
	original_price_str = raw_input("What is the price? $ ")
	if original_price_str in ("", "exit", "close", "quit", "EXIT", "CLOSE", "QUIT"):
		return "close"
	else:
		return float(original_price_str)

def po(): # ask for and set percent off
	percent_off_str = raw_input("What is the percent off? (no % symbol please) ")
	if percent_off_str in ("", "exit", "close", "quit", "EXIT", "CLOSE", "QUIT"):
		return "close"
	else:
		return float(percent_off_str)

def dp(): # ask for and set discount price
	discount_price_str = raw_input("What is discount price? $ ")
	if discount_price_str in ("", "exit", "close", "quit", "EXIT", "CLOSE", "QUIT"):
		return "close"
	else:
		return float(discount_price_str)

#--------------------------------------------------------------------

def original(): # find original price
	discount_price_f = dp()
	if discount_price_f == "close":
		print string.center('\nThank you for using "Discount Wiz"!', 79)
		return 0
	percent_off_f = po()
	if percent_off_f == "close":
		print string.center('\nThank you for using "Discount Wiz"!', 79)
		return 0
	original_price_f = discount_price_f / (1 - percent_off_f / 100)
	print "The original price is $", round(original_price_f, 2)
	print ""
	time.sleep(7)

def percent(): # find the percent off
	original_price_f = op()
	if original_price_f == "close":
		print string.center('\nThank you for using "Discount Wiz"!', 79)
		return 0
	discount_price_f = dp()        
	if discount_price_f == "close":
		print string.center('\nThank you for using "Discount Wiz"!', 79)
		return 0
	percent_off_f = 100 - discount_price_f / original_price_f * 100
	percent_off_s = str(round(percent_off_f, 0))
	print "The percent off the price is ", percent_off_s[:-2] , "\b%"
	print ""
	time.sleep(7)

def discount():  # find discount price
	original_price_f = op()
	if original_price_f == "close":
		print string.center('\nThank you for using "Discount Wiz"!', 79)
		return 0
	percent_off_f = po()        
	if percent_off_f == "close":
		print string.center('\nThank you for using "Discount Wiz"!', 79)
		return 0
	discount_price_f = original_price_f - percent_off_f / 100 * original_price_f
	print "The discount price is $", round(discount_price_f, 2)
	print ""
	time.sleep(7)

#-------------------------------------------------------------------- 
# program prints this menu
import time, string

while 1:
	print string.center("Version 1.6.2  Stable  Copyright(c)  2000,     6ft dan(TM)", 79)
	print string.center("==============================================================", 79)
	print string.center("| DDDD   IIII   SSSS   CCCC   OOOO   UU  UU  NN   NN  TTTTTT |", 79)
	print string.center("| DD  D   II   SS     CC     OO  OO  UU  UU  NNN  NN    TT   |", 79)
	print string.center("| DD  D   II    SSS   CC     OO  OO  UU  UU  NN N NN    TT   |", 79)
	print string.center("| DD  D   II      SS  CC     OO  OO  UU  UU  NN  NNN    TT   |", 79)
	print string.center("| DDDD   IIII  SSSS    CCCC   OOOO    UUUU   NN   NN    TT   |", 79)
	print string.center("|                                                    $$      |", 79)
	print string.center("|  ()()())   WW         WW   IIIIII   ZZZZZZZ       $$$$$    |", 79)
	print string.center("|  /     \\   WW         WW     II          ZZ      $ $$      |", 79)
	print string.center("| |  !_!  |  WW    W    WW     II        ZZ         $$$$$    |", 79)
	print string.center("| | \___/ |   WW  W W  WW      II      ZZ            $$ $    |", 79)
	print string.center("|  \\ ___ /     WWW   WWW     IIIIII   ZZZZZZZ      $$$$$     |", 79)
	print string.center("=====================================================$$=======", 79)
	print string.center("__/\\__/\\__/\\__/\\__/\\__/\\__/\\__/\\__/\\__/\\__/\\__/\\__/\\__/\\__/\\__", 79)
	print string.center("~~\\/~~\\/~~\\/~~\\/~~\\/~~\\/~~\\/~~\\/~~\\/~~\\/~~\\/~~\\/~~\\/~~\\/~~\\/~~", 79)
	print string.center("-----------------INSTRUCTIONS FOR DISCOUNT WIZ----------------", 79)
	print string.center("| Type:      o       :to find original price                 |", 79)
	print string.center("| Type:      p       :to find percent off                    |", 79)
	print string.center("| Type:      d       :to find discount price                 |", 79)
	print string.center("| Type:     exit     :to exit                                |", 79)
	print string.center("--------------------------------------------------------------", 79)
	userinput = raw_input("Enter your choice now please: ")
	if userinput == "o":
		if original() == 0:
			break
		else: pass
	elif userinput == "p":
		if percent() == 0:
			break
		else: pass
	elif userinput == "d":
		if discount() == 0:
			break
		else: pass
	else:
		print '\n' * 7
		print string.center('Thank you for using "Discount Wiz"!', 79)
		break



#----------------------------CopyRight!----------------------- 
print string.center("____________________________________________________________", 79)
print string.center("Hope you enjoyed Discount Wiz.  This is not freeware, there ", 79)
print string.center("is a young teen who really could use some cash.  Please send", 79)
print string.center("a check of at least $5.00 to                                ", 79)
print ""
print string.center("Daniel P. Clark      ", 79)
print string.center("ADDRESS VOID         ", 79)
print string.center("Front Royal, VA 22630", 79)
print ""
print string.center("Thank you, include your E-mail and I can give you an update ", 79)
print string.center("that doesn't have this shareware pause or notice.  I think  ", 79)
print string.center("you'll like it that way.                                    ", 79)
print ""
print string.center("Copyright(c) -Currently (Unregistered)- Use it, Support it! ", 79)
print string.center("____________________________________________________________", 79)

# copyright notice and message saying that it's not freeware
time.sleep(22)