Why this sequential model is not starting?
from keras.models import Sequential
from keras.layers import InputLayer

model = Sequential()
model.add(InputLayer(input_shape))
model.add(BatchNormalization(axis = 3))


This should work. The first error was because the model was getting reassigned. The second error was because 'Input' is a function of 'layers' class but not a class, 'InputLayer' is a class.