Unable to import SGD and Adam from 'keras.optimizers'
from tensorflow.keras.utils import to_categorical
It works just as well for to_categorical.
Trying to run---
from keras.optimizers import SGD, Adam,
I get this error---

Traceback (most recent call last):
  File "C:\Users\usn\Downloads\CNN-Image-Denoising-master ------after the stopping\CNN-Image-Denoising-master\CNN_Image_Denoising.py", line 15, in <module>
    from keras.optimizers import SGD, Adam
ImportError: cannot import name 'SGD' from 'keras.optimizers'

as well as this error, if I remove the SGD from import statement---

ImportError: cannot import name 'Adam' from 'keras.optimizers'

I can't find a single solution for this.
I have Keras and TensorFlow installed. I tried running the program in a virtualenv (no idea how that would help, but a guide similar to what I want mentioned it) but it still doesn't work. If anything, virtualenv makes it worse because it doesn't recognize any of the installed modules. I am using Python 3.9. Running the program in cmd because all the IDEs just create more trouble.
I am stumped. My knowledge of Python is extremely basic; I just found this thing on GitHub. Any help would be greatly appreciated.