My name is Juan Widyaya. I graduated from Maranatha Christian University in 2012 majoring in Bachelor of Electrical Engineering. Currently I am working at PT. Yamaha Indonesia Motor Mfg. and also studying at Maranatha Christian University majoring in Master of Computer Science. I have known python since my master’s degree in computer science (not long time ago). This semester (2020) I am taking a thesis on diabetic retinopathy classification using deep learning technique convolutional neural networks. This deep learning world really impresses me, we can use data from many domain knowledge to extract information and act on it. This is the starting point of my long journey in the deep learning world.