A suggestion in jupter

In Jupyter, the lowercase letter of “L”, which is “l”, looks the same as the number “1”. It is hard to make difference between them, especially in Week 4 Assignment 1 Exercise 2 - initialize_parameters_deep. Suggest using another letter or the full word “layer”.

That’s a good point! With the particular font they use for the code in the notebooks, the difference between “l” and “1” is really subtle. The grader doesn’t care about the internal variable names you use in the functions: it only tests by calling the functions and comparing the outputs. So you are welcome to change the template code to use a loop control variable other than l there.