如何使用os.listdir（目录）读取图像？

Question

我尝试使用os.listdir(directory)和Keras读取图像：

import os
from PIL import Image
from keras.preprocessing import image

img_path = 'D:\folder\train'

images = [(img, label) for (img, label) in zip(label_train.Image[:5], label_train.Id[:5])]

fig, m_axs = plt.subplots(1, len(images), figsize = (20, 10))
#show the images and label them
for ii, c_ax in enumerate(m_axs):
    c_ax.imshow(imread(os.path.join(img_path,images[ii][0])))
    c_ax.set_title(images[ii][1])

我在此行收到错误：c_ax.imshow(imread(os.path.join(img_path,images[ii][0])))错误消息Invalid argument: 'D:\\folder\train\\00001.jpg。

我正在使用Python3。应该如何编辑代码？