pythoncamp0

Interactive Python Part 1

Arithmetic Expressions

int() takes the "whole" part of a decimal number.
float() takes a number with an accuracy of 12/15 decimal points.

For division,
int(a) / int(b) = int(a/b)
float(a) / float(b) = float(a/b)

Priority:
Simply by order of appearance.

Variables

a += 1
same as a = a + 1

Functions

def Function_name(Variable_1,Variable_2):
    Result = Variable_1 * Variable_2
    return Result

More Operations

Operators

31 // 10 
returns 3, 

31 % 10
returns 1, 

1 % 10
returns 1.

Module:

A set of functions, previously developed by others.
Calling module by typing

import Module_Name  

Logic and comparisons

If a == 10 :
    print "True"
elif a == 5 :
    print "False"
else:
    print "Nah"

"==" means Comparison

Programming tips 1

• Case sensitivity
• String vs. Number
• = vs. ==

Local vs. Global variables

• Anything created inside a function, is a local variable.
• By using "global variable", the variable in function becomes global one.

SimpleGUI

• Program Structure
  • Globals (state)
  • Helper functions
  • Classes
  • Define event handlers
  • Create a frame
  • Register event handlers
  • Start frame & timers

Programming tips 2

• "return" is important in a function.
• Otherwise, this function returns "None"