Copy 2020 prerelease to new file

2020-computer-science-igcse-prerelease.py

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+# retrieve user input & validate it
+def get_input(dict):
+	tmp = None
+	# keep asking until input is valid
+	while (not tmp):
+		# get input, strip spaces and convert to uppercase
+		tmp = input().upper().strip()
+		# if input isn't a valid product code
+		if (not tmp in dict.keys()):
+			# print error
+			print("Please enter a valid product code.")
+			# reset input to blank, so user is asked again
+			tmp = None
+	# return input
+	return tmp
+
+# print available options
+def print_details(dict):
+	# for every item
+	for item in dict.keys():
+		# display product code, price and description
+		print("%s: $%.2f, %s" % (item, dict[item][0], dict[item][1]))
+
+# print chosen option from dictionary and return cost
+def print_chosen(dict, item):
+	# print product code and description
+	print("%s: %s" % (item, dict[item][1]))
+	# return cost
+	return dict[item][0]
+
+# dictionaries of for items, prices and descriptions
+phones_dict = {"BPCM": (29.99, "Compact"),
+				"BPSH": (49.99, "Clam Shell"),
+				"RPSH": (199.99, "RoboPhone – 5-inch screen and 64 GB memory"),
+				"RPLL": (499.99, "RoboPhone – 6-inch screen and 256 GB memory"),
+				"YPLS": (549.99, "Y-Phone Standard – 6-inch screen and 64 GB memory"),
+				"YPLL": (649.99, "Y-Phone Deluxe – 6-inch screen and 256 GB memory")}
+
+tablets_dict = {"RTMS": (149.99, "RoboTab – 8-inch screen and 64 GB memory"),
+				"RTLM": (299.99, "RoboTab – 10-inch screen and 128 GB memory"),
+				"YTLM": (499.99, "Y-Tab Standard – 10-inch screen and 128 GB memory"),
+				"YTLL": (599.99, "Y-Tab Deluxe – 10-inch screen and 256 GB memory")}
+
+# dictionary for all devices (phones and tablets)
+devices_dict = {**phones_dict, **tablets_dict}
+
+# dictionary for SIMs
+sims_dict = {"SMNO": (0.00, "SIM Free (no SIM card purchased)"),
+				"SMPG": (9.99, "Pay As You Go (SIM card purchased)")}
+
+# dictionary for cases
+case_dict = {"CSST": (0.00, "Standard"),
+				"CSLX": (50.00, "Luxury")}
+
+# dictionary for chargers
+charger_dict = {"CGCR": (19.99, "Car"),
+				"CGHM": (15.99, "Home")}
+
+# total cost
+total = 0
+# total amount of money saved
+saving = 0
+# ensure user is asked for input until they don't want more devices
+run = True
+# total number of devices ordered
+devices = 0
+
+# run until user doesn't want any more devices
+while run:
+	# get chosen device
+	print("Choose an option:")
+	print_details(devices_dict)
+	device = get_input(devices_dict)
+	# increase number of devices ordered
+	devices += 1
+
+	# if phone chosen
+	if (device in phones_dict.keys()):
+		# get chosen SIM
+		print("Choose an option:")
+		print_details(sims_dict)
+		sim_payg = get_input(sims_dict)
+
+	# get chosen case
+	print("Choose an option:")
+	print_details(case_dict)
+	case = get_input(case_dict)
+
+	# get chosen charger(s)
+	print("Which charger(s) would you like? Enter the codes for those you want with a space between them, or enter nothing to choose neither")
+	print_details(charger_dict)
+	# create array of chosen chargers
+	chargers = input().upper().split(" ")
+	# remove invalid product codes
+	for item in chargers:
+		if item not in charger_dict:
+			chargers.remove(item)
+
+	# if not first device, apply discount
+	if (devices > 1):
+		# add cost of device to total
+		total += 0.9 * \
+			print_chosen(devices_dict, device)
+		# record discount applied
+		saving += 0.1 * \
+			print_chosen(devices_dict, device)
+	# if first device, don't apply discount
+	else:
+		# add cost of device to total
+		total += print_chosen(devices_dict, device)
+	# if phone chosen, add cost of SIM to total
+	if (device in phones_dict):
+		total += print_chosen(sims_dict, sim_payg)
+	# add cost of chosen case to total
+	total += print_chosen(case_dict, case)
+	# add cost of chosen chargers to total
+	for charger in chargers:
+		total += print_chosen(charger_dict, charger)
+	# print subtotal
+	print("Subtotal: $%.2f" % total)
+	# ask if user want another device, and keep running if they do
+	run = True if (input("Would you like another device (y/n)?").lower().strip()[0] == "y") else False
+
+# print total cost and saving
+print("Total: $%.2f\nSaving: $%.2f" % (total, saving))