Python implementation of comparison algorithm for SQL Server GUID (uniqueidentifier)

guid_compare.py

def less_than_guid(a,b):
    """
    This implements the weird comparison method for sql server
    GUID.
    """
    groups = [slice(10,16), slice(8,10), slice(6,8), slice(4,6), slice(0,4)]
    for g in groups:
        if a.bytes[g] < b.bytes[g]:
            return True
        elif a.bytes[g] > b.bytes[g]:
            return False
    return False