Introduction to Python - Part Two

Introduction to Python II CSE 391: Artificial Intelligence adapted from slides by Matt Huenerfauth for CSE 391, 1/05

Dictionaries: A Mapping type ,[object Object],[object Object],[object Object],[object Object],[object Object]

Creating and accessing dictionaries ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Updating Dictionaries ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Removing dictionary entries ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Useful Accessor Methods ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Defining Functions ,[object Object],[object Object],[object Object],[object Object],[object Object],The indentation matters… First line with different indentation is considered to be outside of the function definition. Function definition begins with “def.” Function name and its arguments. The keyword ‘return’ indicates the value to be sent back to the caller. Colon.

Python and Types ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Calling a Function ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Functions without returns ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Function overloading? No. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Functions are first-class objects in Python ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

True and False ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Boolean Logic Expressions ,[object Object],[object Object],[object Object],[object Object],[object Object]

Special Properties of and and or ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

The “and-or” Trick ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Control of Flow ,[object Object],[object Object],[object Object],[object Object]

if Statements ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

while Loops ,[object Object],[object Object],[object Object],[object Object],[object Object]

break and continue ,[object Object],[object Object]

assert ,[object Object],[object Object],[object Object]

Generating Lists using “List Comprehensions”

List Comprehensions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Using List Comprehensions 1 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Using List Comprehensions 2 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Using List Comprehensions 3

Filtered List Comprehension 1 ,[object Object],[object Object],[object Object],[object Object]

Filtered List Comprehension 2 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Nested List Comprehensions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

For Loops / List Comprehensions ,[object Object],[object Object],[object Object],[object Object]

For Loops 1 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Note: Non-standard colors on these slides.

For Loops 2 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

For loops and the range() function ,[object Object],[object Object],[object Object],[object Object]

Lambda Notation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Default Values for Arguments ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

The Order of Arguments ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Multiple Assignment with Sequences ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Empty Containers 1 Note: an empty container is logically equivalent to False. (Just like None.)

Empty Containers 2 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

String Operations ,[object Object],[object Object],[object Object],[object Object]

String Formatting Operator: % ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Printing with Python ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

String to List to String ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Convert Anything to a String ,[object Object],[object Object],[object Object],[object Object]

Introduction to Python - Part Two

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Introduction to Python - Part Two