1 / 15

I210 review

I210 review. About Final Exam. When: 2:45-4:45 p.m., Thurs., May 7 Where: BU 400 What will be covered: Everything we talked so far (excluding the optional topics)

casper
Télécharger la présentation

I210 review

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. I210 review

  2. About Final Exam • When: 2:45-4:45 p.m., Thurs., May 7 • Where: BU 400 • What will be covered: Everything we talked so far (excluding the optional topics) • If you attended most of the lectures, did the PLTL exercises, wrote your own codes, took the quizzes by yourself, you should have nothing to worry about the final exam! Guide to Programming with Python

  3. Data Types • Data type: sequences (containers) • Strings (a sequence of letters) • Tuples (a sequence of elements of any type; immutable) • Lists (a sequence of elements of any type; mutable) • Dictionary is NOT a sequence • How to access the elements in a sequence • Sequential access (using for and while loops) • Indexing & Slicing • Removing and adding elements • Important sequence operators and functions, len([1, 2, 3]), ”a" in "abc", [1, 2, 3].index(1) Guide to Programming with Python

  4. Branching Structures • Branches based on a condition/conditions • if • if-else • if-elif-else • Condition: Expression that is True or False • Often create conditions by comparing values • Treating values as conditions: Any empty (None) or zero value is False • Compound conditions (logical operators) Guide to Programming with Python

  5. Loop Structure • Need to know when and how to use for and while loops correctly • for loops: iterate over the elements in a sequence • while loops: repeat a block of code as long as a condition is • insertion_sort.py Guide to Programming with Python

  6. Functions • How to write functions • How to receive and return values • Understand local and global variables Guide to Programming with Python

  7. A Sample Question • Write a function to translate temperate value in Fahreheit to Celcius. The function takes in two real numbers, minF and maxF through its parameters, which signify the minimum Fahrenheit and maximum Fahreheit temperature to display, as well as a third real number, step, which signifies the increment between temperatures to display. The function needs to display the Fahrenheit values between minF and maxF in increments of step in a table associated with their Celcius equivalents to the screen. Recall that the formula for converting a Fahrenheit temperature to Celcius is: C = (5/9) * (F-32) Guide to Programming with Python

  8. Files • How to use files • Read from text files; readline(), readlines() • Write to text files (permanent storage); write(), writelines() • Need to open a file before using it, and close it when it is done • How to extract information from the strings you read in from a text file! text_file = open("read_it.txt", "r") for line in text_file: line = line.strip() (name, score) = line.split() Guide to Programming with Python

  9. A Sample Question • Write a function that accepts a filename and reads in the comma-separated numbers from the text file. The function saves the numbers in a list, calculates and displays the average of the numbers, and return the list of numbers. Guide to Programming with Python

  10. Handling Exceptions try: num = float(raw_input("\nEnter a number: ")) except(ValueError): print "That was not a number!" else: print "You entered the number", num • Can add single else clause after all except clauses • else block executes only if no exception is raised • num printed only if assignment statement in the try block raises no exception Guide to Programming with Python

  11. OOP • How to create classes to define objects • How to write methods and create attributes for objects • How to instantiate objects from classes • Understanding inheritance • Derive new classes from existing ones • Extend the definition of existing classes • Override method definitions of existing classes • Using modules Guide to Programming with Python

  12. GUI Programming • Events-driven programming! • Work with a GUI toolkit • Tkinter • Create a root window and create a frame • Create and use widgets • Buttons; text entries; text boxes; check buttons; radio buttons • Layout of the widget; grid() • Create event handlers and bind (associate) events with event handlers Guide to Programming with Python

  13. A Sample Question Guide to Programming with Python

  14. Games • Multiple choices only (no small questions) • How to use livewires, override update() and constructor method in a class derived from the games.Sprite • Understanding the important games objects (screen, keyboard, mouse) and classes (Sprites, Text, Message) Guide to Programming with Python

  15. Test me • Test if a function or a class works correctly by writing up a series of testing cases with different inputs • Of course, you need to know what are the expected results Guide to Programming with Python

More Related