Python
Dictionaries
A dictionary groups values under named keys:
student = {"name": "Ada", "track": "Frontend"}.
Example: two ways to read a value
student = {"name": "Ada", "track": "Frontend"}
print(student["name"], "is studying", student["track"])
print(student.get("age", "not provided"))Ada is studying Frontend
not providedstudent["name"] raises an error if the key doesn't
exist. student.get("age", "not provided") instead returns a
fallback value safely, no error, when the key is missing. Use bracket
access when a key is guaranteed to be there; use .get() with
a sensible default whenever it might not be, which is common when working
with data that came from an external source like an API response.
student = {"name": "Ada", "track": "Frontend"}
print(student["name"], "is studying", student["track"])Ada is studying Frontend