Problems encountered when installing tensorflow using anaconda3

According to the tutorial on the web, you will need to install the video driver and cuda before installing tensorflow. However, cuda was automatically installed when I installed the graphics driver. As a result, I could not find the installation path of cuda. However, cuda could be identified by anaconda and tensoflow was installed. contrib' got an error while running the program: ModuleNotFoundError: No module named 'tensorflow.contrib'. It should be an environment variable configuration problem. The program's user manual says to set /cuda/bin as an environment variable but I can't find the cuda folder at all. I wonder if you guys have any solutions.