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Dictionaries: Python: Uncharted

Courses PythonDictionaries

Dictionaries

Group related values under exact keys, update and traverse dictionaries, build tallies, and combine dictionaries with lists to model useful data.

Python
Unit 8 of 20
20 lessons
180 min
420 XP

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Lessons

20 total

1A Card for EverythingRecognize the related named fields that belong together on a contact card.InteractiveConcept7 min20 XPOpen
2Your First dictCreate a Python dictionary literal and read one value by its key.CodeConcept8 min20 XPOpen
3Keys Are ExactRepair a missing-key lookup with get and a useful default value.CodeConcept8 min20 XPOpen
4Grow and PruneAdd, update, and delete dictionary entries while editing a profile.CodeConcept9 min20 XPOpen
5in Checks KeysGuard dictionary access by checking whether a key is present.CodeConcept7 min20 XPOpen
6Loop the KeysLoop directly over dictionary keys and use each key to read its value.CodeConcept8 min20 XPOpen
7items, UnpackedUnpack dictionary key-value pairs while looping over items.CodeConcept8 min20 XPOpen
8Tally MachineBuild a dictionary tally from a changing sequence of votes.CodeConcept9 min20 XPOpen
9Predict the DictTrace four dictionary mutations and predict the remaining entries.InteractiveConcept8 min20 XPOpen
10Dicts Inside DictsCreate and access a nested customer dictionary inside an order.CodeConcept8 min20 XPOpen
11The Workhorse ShapeLoop over a list of dictionaries and read one named field from each record.CodeConcept9 min20 XPOpen
12Total the CartAccumulate a cart total from price and quantity fields in a list of dictionaries.CodeConcept9 min20 XPOpen
13Manifest RunDrive a route from a manifest dictionary containing a list of stop records.Code worldConcept11 min20 XPOpen
14Group into BucketsGroup words into dictionary lists by their lowercase first letter.CodeConcept10 min20 XPOpen
15Shape from a StoryArrange dictionary-building fragments to model a parcel with a nested destination.InteractiveConcept8 min20 XPOpen
16Mini CatalogFind a book by a changing ISBN key and return the stored record or None.CodePractice11 min20 XPOpen
17Expense TallyCategorize and sum expense entries under dynamic dictionary keys.CodePractice11 min20 XPOpen
18Two Names, One DictContrast a shared dictionary alias with an independent shallow copy.CodeConcept10 min20 XPOpen
19List or Dict?Choose and justify lists, dictionaries, or a combination for three datasets.InteractiveConcept9 min20 XPOpen
20Dictionaries Mastery CheckBuild a route report by traversing nested stop dictionaries and applying safe parcel defaults.CodeMastery check12 min40 XPOpen

Lists Strings in Depth