Using Jupyter (Good), Exercises

library(reticulate)
use_python("/Users/chammika/miniconda3/envs/science-work/bin/python", required = TRUE)

Exercise 1 (Learning to interrupt)  

Step 1

Copy and paste the following simple, innocent code and run it.

while True:
    print('*', end='')

Step 2

Your Jupyter Notebook should be printing like crazy right now.

Task

Figure out how to interrupt the proceedings (Kernal).

Exercise 2 (Resetting & Restarting the Kernal)  

Step 1

Run the following:

print = 'PRINT'

Step 2

Now try:

print('Hello World')

Yes, you have messed up your print() function¹.

Task

Fix this by Restarting the Kernal. This will also restart the Python interpreter.

Exercise 3 (Timing Stuff) The two code examples below achieve the same end result.

squares = [i**2 for i in range(10)]

squares = list()
for i in range(10):
    squares.append(i**2)

1. Verify that both codes give the same result (HINT: print()).
2. Use %%timeit to measure the execution time for each example.
3. Discuss with a friend to understand what each of the numbers in the %%timeit output represents and write down their meanings.

Footnotes

1. Okay, okay it was me, but you pressed the button.