Contents

Practice 3

Question 1

Adapt the first example in the notes so that every 5 timesteps the population decreases by 20.

What value should 20 be changed to so that the popultation is roughly constant over the long term (don’t calculate this; just get a rough figure by experimenting and looking the resulting graph).

Question 2

Use a for loop to generate the following lists:

  1. [5, 7, 9, 11, 13, 15]

  2. [1, 10, 100, 1000, 10000, 100000]

  3. [0, 1, 2, 0, 1, 2, 0, 1, 2] (hint: use the % operator)

Question 3

Look up the predicted daily maximum and minimum temperatures for the next 10 days according to the BBC weather forecast.

https://www.bbc.co.uk/weather/2643743

Create two lists containing the maximum and minimum temperatures and plot them as two separate lines on a line graph, including axis labels and title. Look up how to add a legend in the Matplotlib documentation.

../_images/temperatures.png

Question 4

The following code initialises a list x with ten integers.

Write code which creates four lists, containing:

  • Every element of x at an even index.

  • Every even element.

  • All elements in reverse order.

  • Only the first and last element.

x = [18, 19, 10, 19, 11, 7, 12, 6, 5, 4]