[Python] do I use "rescale=1. / 255" or not? Building VGG-like CNN

I am building a CNN with a similar architecture as VGG16. I know in VGG16 u do rescale u also center around 0. Now I train mine from scratch, does it make a difference and should I do it or no? Anyone who can help?

datagen = ImageDataGenerator(rescale=1. / 255)

Thanks a lot guys! <3

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