index = 1

fig, axes = plt.subplots(4, 3, figsize=(8, 4), tight_layout=True)
for row in range(4):
    for col in range(3):
        image_name = os.path.join(r'./jupyter/matplotlib/images', str(index)+'.jpg')
        img = plt.imread(image_name)
        axes[row, col].imshow(img)
        axes[row, col].axis('off')
        index += 1
fig.savefig('save_img.jpg', facecolor='grey', edgecolor='red')
plt.show()