script_16.py - List Membership Checker

Code

#!/usr/bin/env python3
"""List membership checker"""

favorite_colors = ["red", "blue", "green", "yellow"]
color = input("Enter a color: ").lower()

if color in favorite_colors:
    print(f"{color} is in the favorite colors list")
else:
    print(f"{color} is not in the favorite colors list")

Explanation

Line 4: favorite_colors = ["red", "blue", "green", "yellow"] - [] syntax creates a list (mutable sequence type) - List contains string elements - favorite_colors variable is type list - Lists can hold multiple values of any type - Elements are ordered and accessible by index

Line 5: color = input("Enter a color: ").lower() - input() returns string - .lower() method chaining converts to lowercase - Makes comparison case-insensitive - color stores lowercase string

Line 7: if color in favorite_colors: - in is membership operator for sequences (lists, strings, tuples) - Checks if color exists anywhere in the list - Returns boolean (True if found, False if not found) - Iterates through list comparing each element - Case-sensitive comparison (that's why we used .lower())