A dictionary is an unordered collection of key-value pairs
Creating an empty dictionary: homeruns = {}
Adding a key-value pair: homeruns["Babe Ruth"] = 713 (he actually had 714)
Adding another pair: homeruns["Mickey Mantle"] = 536
Deleting an item: del homeruns["Mickey Mantle"]
Modifying an item: homeruns["Babe Ruth"] = 714
Determining the number of items in a dictionary: len(homeruns)
In-Class Activity
Download and experiment with raven.py and raven_poem.txt until you understand how raven.py works.
Active Learning
Modify raven.py to count and print the occurences of each letter in the alphabet from ‘a’ to ‘z’, regardless of whether it is lowercase or uppercase. Use a dictionary in your solution.
Homework
Write a Python program that reads the data from ebird.csv and creates a dictionary out of the data.