Category Archives: Python

Pydev: The Best Python IDE

Posted on July 21, 2010 by Lee

While I don’t usually advertise, I love eclipse for all of its feature rich implementations of language specific IDE’s. Among those is Pydev, a complete first class IDE for Python.
Recently, Pydev just hit version 1.6.0 (Congratulations!) with the…

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Python: Self references in List comprehension

Posted on July 20, 2010 by Lee

One of the great abilities in Python that is copied over from Haskell is the ability to construct lists from other lists or iterators inline. This is of course limiting in certain cases where self references are necessary. For example,…

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Python Tip: Copying an object

Posted on July 18, 2010 by Lee

One of the several “features” of python that often land beginners head over feet with their faces in the mud is the distinction between references and copies. Say we have the following list a:

a = [1,3,5,7,9,11]

…

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Brain Teaser: Multiply by 6

Posted on July 17, 2010 by Lee

How do I go about multiplying a real number n by 6 in python without using the * or the + operators?

Solution:

x6 = lambda n: (n<<3) - n - n

Rationale:

n

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Linked Lists via ctypes in Python

Posted on April 6, 2010 by Lee 
from ctypes import *

class linknode(Structure):
    pass
linknode._fields_ = [
                ("nextNode", POINTER(linknode)),
                ("intData", c_int),
                ]
class linked_list():
    head_node = None
    def add(self, int_data):
        node_to_add = linknode(intData = c_int(int_data))
        if (self.head_node == None):
            self.head_node = node_to_add
        else:
            traverse_node

…

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Best Hello World App Ever :D

Posted on February 1, 2010 by Lee

Written in Python :D

See http://failboat.me/2009/cute-functions-creating-pseudo-operators-in-python/ for more details.

#Hello World

class Operator(object):
    def __init__(self, func, count=2):
        self._func_ = func
        self._args_ = []
        self._count_ = count
    def __ror__(self, first_arg):
        self._args_.append(first_arg)

…

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Gettings the most out of your bits

Posted on November 1, 2009 by Lee

The following will produce the bit representation of an ord(byte) in python

def bit(chr, i=0, str=''):
    if i > 7: return str
    coef = (2**(8-i-1))
    if chr >= coef: return bit(chr-coef, i+1, str+'1')
    return bit(chr, i+1, str+'0')

…

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Primitive Collision Detection – Circular objects

Posted on October 31, 2009 by Lee

Consider the following –

If you are designing a game, and have the players shaped as circles, how would you detect bullet collisions with the players?

Well, the problem with bullet collision detection is that you can’t just use…

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