[Python] Is it okay to use the Keras library to build deep learning models, or should I write...

I'm a student currently studying deep learning. I've always had doubts about how to effectively improve my coding skills, especially when it comes to building models.

How should I go about practicing model implementation?

Is it worth learning to code everything from scratch (e.g., implementing neural networks without libraries)?

How is deep learning typically done in the industry — do professionals build models from scratch, or mainly use high-level libraries?

I'm looking for guidance on how to align my learning and coding practice with real-world expectations. Any advice would be appreciated!

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