lesson4.md

Python Lists: Takeaways

Creating a list of data points:

row_1 = ['Facebook', 0.0, 'USD', 2974676, 3.5] row_2 = ['Instagram', 0.0, 'USD', 2161558, 4.5]

Creating a list of lists:

data = [row_1, row_2]

Retrieving an element of a list:

first_row = data[0] first_element_in_first_row = first_row[0] first_element_in_first_row = data[0][0] last_element_in_first_row = first_row[-1] last_element_in_first_row = data[0][-1]

Retrieving multiple list elements and creating a new list:

row_1 = ['Facebook', 0.0, 'USD', 2974676, 3.5] rating_data_only = [row_1[3], row_1[4]]

Performing list slicing:

pythonrow_1 = ['Facebook', 0.0, 'USD', 2974676, 3.5] second_to_fourth_element = row_1[1:4]

A data point is a value that offers us some information. A set of data points make up a dataset. A table is an example of a dataset. Lists are data types that can store datasets.