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 S

black M

black L

white S

white M

white 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}')