List Methods

Python lists come with useful methods that let you modify and interact with the list easily.

• append() — adds an item to the end of the list:
  colors.append("yellow")
• remove() — removes an item by value:
  colors.remove("green")
• pop() — removes and returns an item by index (default is last):
  last_color = colors.pop()

List Slicing

Slicing lets you get a portion of a list using the format list[start:end]. It returns a new list from index start up to, but not including, end.

Example:‍

numbers = [10, 20, 30, 40, 50]
subset = numbers[1:4]  # returns [20, 30, 40]

You can omit start or end:

• numbers[:3] gets first three items
• numbers[2:] gets items from index 2 to the end

Why This Matters in Analytics

List methods and slicing help you manipulate data efficiently — selecting rows, cleaning values, or preparing subsets for analysis.

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