Python Lists and Dictionaries - GitHub Pages

Python Lists and Dictionaries

CS 8: Introduction to Computer Science, Winter 2019

Lecture #13

Ziad Matni, Ph.D.

Dept. of Computer Science, UCSB

Administrative

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Hw07 out today ¨C DUE ON MONDAY 3/11

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Lab07 ¨C will be issued for Tuesday

¨C Due by next week Monday by 11:59 PM

¨C A little involved, so feel free to pair-up (optional)

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You are still working on Project #1¡­

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MIDTERM #2 is graded!

¨C

¨C

3/4/19

right?

Will be put up on GauchoSpace by tomorrow

To review your midterms: same arrangement as with Midterm #1

Matni, CS8, Wi19

2

3/4/19

Matni, CS8, Wi19

3

Lecture Outline

? Doing more with Lists

¨C Simple Example: Find the Median of multiple numbers

? Dictionaries

3/4/19

Matni, CS8, Wi19

4

What Operations Can We do with LISTS?

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Find min, max, sum

¨C max(list), min(list), sum(list)

¨C How does this work with numbers? strings?

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Add item to a list (at the end)

¨C list.append(item)

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Sort a list

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¨C list.count(item)

¨C list.sort()

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Reverse a list

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Remove item from a list

¨C list.remove(item)

3/4/19

Add item to a list (anywhere: before some index)

¨C list.insert(index, item)

¨C list.reverse()

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Count how many of something

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Remove LAST item from a list

¨C list.pop()

Matni, CS8, Wi19

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