import math
def convert_bytes(bytes):
bytes = float(bytes)
if bytes >= 1099511627776:
size, srepr = bytes / 1099511627776, "TB"
elif bytes >= 1073741824:
size, srepr = bytes / 1073741824, "GB"
elif bytes >= 1048576:
size, srepr = bytes / 1048576, "MB"
elif bytes >= 1024:
size, srepr = bytes / 1024, "KB"
else:
size, srepr = bytes, " bytes"
return "%d%s" % (math.ceil(size), srepr)