将％格式更改为f字符串

Question

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 Sblack Mblack Lwhite Swhite Mwhite L所以我试图删除那些％s％s，而是使用af字符串格式。有人可以表现出如何做到这一点吗？谢谢

Answer 1

>>> colors = ['black', 'white']

>>> sizes = ['S', 'M', 'L']

>>> for c in colors:

...    for s in sizes:

...        print(f'{c} {s}')

另一种方法是使用itertools.product：

>>> for c, s in itertools.product(colors, sizes):

...     print(f'{c} {s}')