Exercise for reference: 

Create a script that generates and prints a list of numbers from 1 to 20. Please do not create the list manually.

Answer: 

my_range = range(1, 21)
print(list(my_range))

Explanation: 

range()  is a Python built-in function that generates a range of integers. However, range()  creates a Python range object. To get a real list object, you need to use the list() function to convert the range object into a list object.