def sort_key(data):
row = data[1]
if key_is_row_function:
k = key(row)
elif key_is_sequence:
k = tuple(utils.NullOrder() if row[n] is None else row[n]
for n in key)
else:
k = row[key]
if k is None:
return utils.NullOrder()
return k
def sort_key(data):
row = data[1]
if key_is_row_function:
k = key(row)
else:
k = row[key]
if k is None:
return utils.NullOrder()
return k