将% formatting更改为f-string

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 S
black M
black L
white S
white M
white L

因此，我正在尝试删除这些%s %s，而不是使用f字符串格式。有没有人能告诉我这是怎么做的。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}')