# To use: import oschecksum
# oschecksum.OSChecksumString('A?')
# Which will have sequence as _
# OR 
# oschecksum.OSChecksumString('A?', sequence='A')

def OSChecksum(astring):
	acode=0
	for ch in astring:
		acode = ord(ch) + acode 
		if acode > 256:
			acode = acode - 256
	return acode


def OSChecksumString(astring, sequence='_'):
	print(";"+astring+"%02X" % OSChecksum(astring)+sequence+'#\n')