C3W3 Assignment training time

[Wendy]

For anyone who is running into issues with slow training times for this assignment, Colab was recently changed to no longer support GPU with Tensorflow 2.8 - and since this assignment specifically loads TF 2.8 for compatibility with the autograder. No GPU makes the training MUCH slower.

The staff will fix this issue when they get back from break in early January, but in the meantime:

Anyone who is working on a local machine environment can use the elegant solution @anoopebey came up with (see above). Thank you @anoopebey, very nice!

For the rest of us using Colab, I suggested a hacky work-around for the Week 1 assignment, that should work for this assignment, too:

CC3_W1_Assignment birds.h5 issue

For anyone who runs into this problem: Since staff is on break until January 2nd, and this also might take a little while to fix, I think this hacky work-around should be enough to make the autograder happy: First, in order to use the GPU in Colab, do NOT run this cell near the beginning of the assignment: # Install packages for compatibility with the autograder !pip install tensorflow==2.8.0 !pip install keras==2.8.0 At the beginning of section 5.2 Save your model for grading, add these c…