CS 105 SUMMER WEDNESDAY 4 What to talk about today? From the - - PowerPoint PPT Presentation
CS 105 SUMMER WEDNESDAY 4 What to talk about today? From the muddiest points Complex inequalities chaining relational and logical operators Challenge 6.5.4 is a good example of this Function usage (calling) and anatomy
From the muddiest points
Complex inequalities – chaining relational and logical
Your questions – please feel free to post
Indentation?
Please use tab for every code block
Largely a PL issue – the editor handles tab
I found myself wondering why you would use ternary/conditional expressions instead
reason you would use one or the other? I am interested in more information in regard of the conditional expression. It is basically a short-version of a single if-else statement. Why do we need conditional expression? The if-else statement can express the same meaning; and with nested statements, if-else statements can exam more conditions than the conditional expression.
I'm with you here, even though I sometimes use the shorthand Old style code – write as little as possible, people prided themselves on being
Modern software engineering – self documenting, legible code is better Most useful for lambdas (out of course scope) and list comprehensions (later on)
Nah fam
You should generally use == for equality in this class is operator is used to check if two OBJECTS are the same For example:
list1 = [1,2,3] list2 = list1 print(list1 is list2)
High level stats: Mean 80%, Median 83% Perspective – each quiz is 5%. Take your score and
Most commonly missed questions are questions that weren't
Better match to quiz 4 than PQ3 was to 3, so
Topics – Up through loops, but not the harder
Specific programming content:
Superb insight To scaffold…
The book => bookshelves The homework => birdhouses The quizzes =>
mostly birdhouses, sometimes with different paint. Sometimes dollhouses
Python has the
Order of ops
==, !=, <= ,
Python has three – not, and, or Their precedence is also exactly that – not before
Given this statement: not False and True or False
((not False) and True) or False (True and True) or False True or False True
in and not in Key piece of setting up for loops Also useful for conditionals "Add a key to a dictionary if it isn't already in the
Reminder – a function has:
You've been calling functions since you first used
Calling a function is just the function name,
Examples:
my_name = input() print_a_name(my_name)
In this class, we are at most asking you to write a
You generally aren't calling functions, unless they
Short answer questions – asking you to call one Methods of an existing object, like .append() Standard library functions, like input()
I think I'd like to do the bee movie script thing Wanted to do it this week, but I want to make