Some Python Basics Getting user input, random numbers, review of - - PowerPoint PPT Presentation

Some Python Basics

Getting user input, random numbers, review of if-statements, and Lists... ...and how these things relate to games! Mark Floryan

User Input: Types

• Clicks / Button Presses

–From game controller, mouse, etc. –Won't talk much about this today

• Console Input

–User directly types input in console –Not common, when might games use this?

• File Input

–VERY common in games...why?

File Input Example

Console Input: Python

• raw_input(<String>)
• <String> is the prompt you want user to receive.
• Need to store the result in a variable like this:
• MyVariable = raw_input(“Please enter something ”)

Console Input: Python

• Let's test it out:
• 1. Program that says hello
• 2. Program that multiplies two numbers

File Input: Python

file = open('newfile.txt', 'r') for line in file: print line,

• http://www.pythonforbeginners.com/files/reading-and-writing-files-in-

python

File Input: Python

• Let's try it out -->

Random Numbers

• Random numbers are VERY important for games
• Why?

Random Numbers

• Import random
• random.random() #seems redundant :)
• Returns a random number between 0 and 1 (1 not inclusive, but

0 is)

Random Numbers

• Let's try it out -->

Lists

• Allows you to store multiple variables in one
• Can access individual variables from the list
• What would games use this for?
• http://www.tutorialspoint.com/python/python_lists.htm
• https://docs.python.org/2/tutorial/datastructures.html

Lists

#!/usr/bin/python list1 = ['physics', 'chemistry', 1997, 2000]; list2 = [1, 2, 3, 4, 5, 6, 7 ]; print "list1[0]: ", list1[0] print "list2[1:5]: ", list2[1:5]

Lists

• Let's try it -->