viewimage.php?id=3dafdf21f7d335ab67b1d1&no=24b0d769e1d32ca73dec87fa11d0283123a3619b5f9530e1a1316068e0daca0ec91e4a8e93c95ee77ee1d4a82792f77ba082491e6942f959b6a42c8d6c8efd93a62ab90805b82f


파이썬 if (-f) 무슨 뜻인가요?