Switch to tensorflow, pluses and minuses:
- more difficult than keras
- batch normalization harder to implement correctly
- more flexible
For this exercise, still need train/predict arg, but only train implmentedSimple tensor flow training - note no batch normalization
code: ex04_tf_train.py
- Computation Graph - note with Graph at bottom
- Explicitly creating variables
- No Batch norm yet, using bias adds
- Idea of session
- Initializing variables
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