colors = ['black', 'white']
sizes = ['S', 'M', 'L']
for tshirt in ('%s %s' % (c, s) for c in colors for s in sizes):
print(tshirt)
black S
black M
black L
white S
white M
white L
所以我试图删除那些%s%s而不是字符串格式.有人能够表达如何做到这一点.谢谢