这个Python代码可以改进吗？
def build_list(types):
for x in types:
for a in ['short', 'long', 'average']:
for b in ['square', 'sloped', 'average']:
for c in ['small', 'large', 'average']:
for d in ['thin', 'thick', 'average']:
for e in ['high', 'low', 'average']:
for f in [True, False]:
for g in [True, False]:
for h in ['flat', 'thick', 'average']:
for i in ['long', 'short', 'average']:
for j in [True, False]:
for k in ['thin', 'thick', 'average']:
for l in ['thin', 'thick', 'average']:
yield [x, a, b, …