while True:
sys.stdout.write(":> ")
l = sys.stdin.readline()
if len(l) == 0:
break
if len(l) == 1:
continue
try:
if l[0] == "=":
if p is None:
sys.stdout.write("No function set.\n")
continue
s = l[1:]
if s[0:2] == "0b":
x = int(s[2:], 2)
elif s[0:2] == "0x":
x = int(s[2:], 16)
else:
x = int(s)
z = evl(p, x)
sys.stdout.write("Res: %d\n" % z)
sys.stdout.write("Hex: %s\n" % hex(z))
sys.stdout.write("Bin: %s\n" % bin(z))
else:
p = parse(l[:-1])
except (AssertionError, ValueError) as ex:
sys.stdout.write("Error.\n")
raise
sys.stdout.write("\nThank you for playing.\n")