name 'Conv2D' is not defined

The error message "name 'Conv2D' is not defined" typically means that the Conv2D class or function has not been imported or defined in the current Python environment.

To fix this error, you need to make sure that you have imported the necessary libraries or modules that define the Conv2D class or function. In particular, the Conv2D class is typically part of the Keras or TensorFlow library, so you may need to import one or both of these libraries before using Conv2D.

For example, to import the Conv2D class from the Keras library, you can use the following code:

from keras.layers import Conv2D

Alternatively, if you are using TensorFlow, you can import the Conv2D class from the TensorFlow library as follows:

from tensorflow.keras.layers import Conv2D

Once you have imported the necessary libraries, you should be able to use the Conv2D class or function without encountering the "name 'Conv2D' is not defined" error.