Christopher Spears [EMAIL PROTECTED] wrote
def __cmp__(self, other):
if self.x == other.x and self.y == other.y:
return 0
elif self.x other.x and self.y other.y:
return -1
elif self.x other.x and self.y other.y:
return 1
Rather than comparing in that manner I'd take a
On Wed, Jul 9, 2008 at 3:05 AM, Alan Gauld [EMAIL PROTECTED] wrote:
Rather than comparing in that manner I'd take a different approach.
I'd measure the length from the origin thus any point that was inside
the circle upon whose ciorcumference the point sits is less than
the point. Any point
On Wed, Jul 9, 2008 at 2:17 PM, Alan Gauld [EMAIL PROTECTED] wrote:
Kent Johnson [EMAIL PROTECTED] wrote
That just raises the question of how do complex numbers compare?
Usually based on magnitude alone.
That's why I said the results would be equivalent to the length of a point
approach.
Kent Johnson [EMAIL PROTECTED] wrote
Usually based on magnitude alone.
That seems a pretty strange definition of equal, that makes (1, 0)
== (0, 1).
Yes I know! But actually in many engineering situations where phase
is not important it's a good first approximation (for example power
Christopher Spears [EMAIL PROTECTED] wrote
class Point(object):
def __init__(self, x=0.0,y=0.0):
class Line(object):
def __init__(self, p1, p2):
self.p1 = Point(x1,y1)
self.p2 = Point(x2,y2)
This is wrong I suspect.
You are passing two point objects into the constructor but
On Tue, Jul 8, 2008 at 12:52 AM, Christopher Spears
[EMAIL PROTECTED] wrote:
For problem 13-6 out of Core Python Programming, I created a line class that
consists of two points. The line class has the following methods: __repr__,
length, and slope. Here is the code:
def __repr__(self):
On Tue, Jul 8, 2008 at 4:01 AM, Alan Gauld [EMAIL PROTECTED] wrote:
def __init__(self,p1,p2):
self.p1 = p1
self.p2 = p2
And since a line should not have zero length (although
you might argue with that!) you could also check if
p1==p2
In this case he should define Point.__cmp__() so
def __init__(self,p1,p2):
self.p1 = p1
self.p2 = p2
And since a line should not have zero length (although you might argue
with that!) you could also check if
p1==p2
In this case he should define Point.__cmp__() so the comparison is by
value rather than identity.
Kent
Christopher Spears [EMAIL PROTECTED] wrote
class Point(object):
def __init__(self, x=0.0,y=0.0):
self.x = float(x)
self.y = float(y)
def __repr__(self):
coord = (self.x,self.y)
return coord
You could add a couple of methods here to get deltaX and
deltaY values Or even
I have been reading everyone's comments on my line class. I have decided to
implement some of the suggestions. Someone suggested that I create a
Point.__cmp__ method. Here is what I have so far:
def __cmp__(self, other):
if self.x == other.x and self.y == other.y:
return
On Tue, Jul 8, 2008 at 3:29 PM, Christopher Spears [EMAIL PROTECTED]
wrote:
I have been reading everyone's comments on my line class. I have decided
to implement some of the suggestions. Someone suggested that I create a
Point.__cmp__ method. Here is what I have so far:
def __cmp__(self,
On Tue, Jul 8, 2008 at 6:29 PM, Christopher Spears
[EMAIL PROTECTED] wrote:
I have been reading everyone's comments on my line class. I have decided to
implement some of the suggestions. Someone suggested that I create a
Point.__cmp__ method. Here is what I have so far:
def __cmp__(self,
def length(self):
dx,dy = self.p1 - self.p2
return (dx**2 + dy **2) ** 0.5
How about:
def length(self):
return math.hypot( *(self.p1 - self.p2) )
Compiled C code will be much faster than squaring and square rooting.
-- Paul
___
On 09/07/2008, Paul McGuire [EMAIL PROTECTED] wrote:
def length(self):
dx,dy = self.p1 - self.p2
return (dx**2 + dy **2) ** 0.5
How about:
def length(self):
return math.hypot( *(self.p1 - self.p2) )
Compiled C code will be much faster than squaring and square
For problem 13-6 out of Core Python Programming, I created a line class that
consists of two points. The line class has the following methods: __repr__,
length, and slope. Here is the code:
#!/usr/bin/python
import sys,math
class Point(object):
def __init__(self, x=0.0,y=0.0):
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