Unit 3 tasks

These problems use lists (ordered sequences) and dictionaries (key-value maps) from 3.1 Lists and 3.2 Dictionaries. You should still be comfortable with loops and input from Unit 2.

Lessons: 3.1 Lists and arrays - 3.2 Dictionaries

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Tutorials: Tutorial 3.1 - Tutorial 3.2

Lists - building, looping, and slicing

Task 1: Weekly lunch menu - Print each weekday with the meal from a fixed list (indexes 0-4).
Task 2: Lap times summary - From a list of lap times (seconds), print the fastest lap and the average.
Task 3: Build a playlist - Append song titles until the user enters a blank line; print the playlist.
Task 4: Marks in a list - Read marks into a list until -1; print count and average.
Task 5: Unique sign-up list - Append a name only if it is not already in the list.
Task 6: Team roster - Add player names until ‘done’; print how many players.
Task 7: Cheapest item index - After entering five prices, print the position (1-5) of the lowest price.
Task 8: Double every level score - Build a new list where each value is twice the original (given list in code).
Task 9: Merge two stock shelves - Add two same-length lists element-wise into a third list.
Task 10: Reading list slices - Print first three, last two, and a middle slice from a fixed list.

Dictionaries - lookup, counting, and updates

Task 11: Cafe menu order total - Use a dict of item to price; loop orders until done; print total.
Task 12: Capital city lookup - Dictionary country to capital; loop until quit.
Task 13: Word tally from a sentence - Split a line into words; count each word in a dictionary.
Task 14: Letter frequency - Count how often each character appears in a word.
Task 15: Inventory commands - Dict of product to count; process add, show, and stop commands.
Task 16: Attendance tally - Start with an empty dict; each entered name increases their day count.
Task 17: Simple phrasebook - Translate words using a dict; unknown words get a default message.

Mixed - lists and dictionaries together

Task 18: Election-style tally - Collect votes in a list then count with a dict to find the winner.

Solutions: e.g. Task 1 solution.