车牌识别代码，运行出错，啥问题
报错内容：
D:\python\python.exe "C:/Users/14643/Desktop/License Plate Recognition/CNN_NeuralNet.py"
2022-04-30 09:14:22.707771: W tensorflow/stream_executor/platform/default/dso_loader.cc:64] Could not load dynamic library 'cudart64_110.dll'; dlerror: cudart64_110.dll not found
2022-04-30 09:14:22.707891: I tensorflow/stream_executor/cuda/cudart_stub.cc:29] Ignore above cudart dlerror if you do not have a GPU set up on your machine.
Traceback (most recent call last):
File "C:\Users\14643\Desktop\License Plate Recognition\CNN_NeuralNet.py", line 188, in
net = char_cnn_net()
File "C:\Users\14643\Desktop\License Plate Recognition\CNN_NeuralNet.py", line 24, in init
self.x_place = tf.placeholder(dtype=tf.float32, shape=[None, self.img_size, self.img_size], name='x_place')
AttributeError: module 'tensorflow' has no attribute 'placeholder'
进程已结束,退出代码1
