On 11 November 2012 02:47, Chris Angelico ros...@gmail.com wrote:
On Sun, Nov 11, 2012 at 1:43 PM, Ian Kelly ian.g.ke...@gmail.com wrote:
On Sat, Nov 10, 2012 at 7:13 PM, Chris Angelico ros...@gmail.com wrote:
I would not assume that. The origin is a point, just like any other.
With a Line
On Sun, 11 Nov 2012 14:21:19 +, Oscar Benjamin wrote:
On 11 November 2012 02:47, Chris Angelico ros...@gmail.com wrote:
On Sun, Nov 11, 2012 at 1:43 PM, Ian Kelly ian.g.ke...@gmail.com
wrote:
On Sat, Nov 10, 2012 at 7:13 PM, Chris Angelico ros...@gmail.com
wrote:
I would not assume
On 11 November 2012 22:31, Steven D'Aprano
steve+comp.lang.pyt...@pearwood.info wrote:
On Sun, 11 Nov 2012 14:21:19 +, Oscar Benjamin wrote:
On 11 November 2012 02:47, Chris Angelico ros...@gmail.com wrote:
On Sun, Nov 11, 2012 at 1:43 PM, Ian Kelly ian.g.ke...@gmail.com
wrote:
On Sat,
On Nov 10, 11:33 am, Jennie namedotpor...@gmail.com wrote:
What is the best solution to solve the following problem in Python 3.3?
import math
class Point:
... def __init__(self, x=0, y=0):
... self.x = x
... self.y = y
... def __sub__(self, other):
...
On Nov 11, 4:31 pm, Oscar Benjamin oscar.j.benja...@gmail.com wrote:
On 11 November 2012 22:31, Steven D'Aprano
Nonsense. The length and direction of a vector is relative to the origin.
If the origin is arbitrary, as you claim, then so is the length of the
vector.
Wrong on all counts.
On 12/11/2012 00:31, Oscar Benjamin wrote:
Plain wrong. Vectors are not defined *from any origin*.
So when the Captain says full speed ahead, steer 245 degrees, you
haven't the faintest idea where you're going, because you have no origin?
--
Cheers.
Mark Lawrence.
--
On 12 November 2012 01:10, Mark Lawrence breamore...@yahoo.co.uk wrote:
On 12/11/2012 00:31, Oscar Benjamin wrote:
Plain wrong. Vectors are not defined *from any origin*.
So when the Captain says full speed ahead, steer 245 degrees, you haven't
the faintest idea where you're going, because
In article mailman.3570.1352682390.27098.python-l...@python.org,
Mark Lawrence breamore...@yahoo.co.uk wrote:
On 12/11/2012 00:31, Oscar Benjamin wrote:
Plain wrong. Vectors are not defined *from any origin*.
So when the Captain says full speed ahead, steer 245 degrees, you
haven't
On 12/11/2012 01:18, Oscar Benjamin wrote:
On 12 November 2012 01:10, Mark Lawrence breamore...@yahoo.co.uk wrote:
On 12/11/2012 00:31, Oscar Benjamin wrote:
Plain wrong. Vectors are not defined *from any origin*.
So when the Captain says full speed ahead, steer 245 degrees, you haven't
On 12/11/2012 01:15, Roy Smith wrote:
In article mailman.3570.1352682390.27098.python-l...@python.org,
Mark Lawrence breamore...@yahoo.co.uk wrote:
On 12/11/2012 00:31, Oscar Benjamin wrote:
Plain wrong. Vectors are not defined *from any origin*.
So when the Captain says full speed
In article mailman.3571.1352683098.27098.python-l...@python.org,
Oscar Benjamin oscar.j.benja...@gmail.com wrote:
But then I'm assuming you meant that 245 degrees was a bearing
relative to North. Was it supposed to be relative to my current angle?
Truthfully I wouldn't know what to do without
On 12 November 2012 01:29, Mark Lawrence breamore...@yahoo.co.uk wrote:
On 12/11/2012 01:18, Oscar Benjamin wrote:
On 12 November 2012 01:10, Mark Lawrence breamore...@yahoo.co.uk wrote:
On 12/11/2012 00:31, Oscar Benjamin wrote:
Plain wrong. Vectors are not defined *from any origin*.
So
On Mon, 12 Nov 2012 00:31:53 +, Oscar Benjamin wrote:
[...]
You were right the first time, Chris. A point that happens to coincide
with the arbitrarily chosen origin is no more truthy or falsey than
any other. A vector of length 0 on the other hand is a very different
beast.
Nonsense.
On Sun, Nov 11, 2012 at 6:33 AM, Jennie namedotpor...@gmail.com wrote:
... def distance(self, point=None):
... p = point if point else Point()
I'd go with this one. Definitely not the third one, which mutates the
class according to a current global every time a Point is instantiated
On 11/10/2012 2:33 PM, Jennie wrote:
What is the best solution to solve the following problem in Python 3.3?
import math
class Point:
... def __init__(self, x=0, y=0):
... self.x = x
... self.y = y
... def __sub__(self, other):
... return Point(self.x -
On 11/10/2012 09:29 PM, Terry Reedy wrote:
On 11/10/2012 2:33 PM, Jennie wrote:
I propose three solutions. The first one:
class Point:
... def __init__(self, x=0, y=0):
... self.x = x
... self.y = y
... def __sub__(self, other):
... return Point(self.x -
On 11/10/2012 03:51 PM, Jennie wrote:
On 11/10/2012 09:29 PM, Terry Reedy wrote:
On 11/10/2012 2:33 PM, Jennie wrote:
I propose three solutions. The first one:
class Point:
... def __init__(self, x=0, y=0):
... self.x = x
... self.y = y
... def __sub__(self,
On Sat, 10 Nov 2012 20:33:05 +0100, Jennie wrote:
[...]
I propose three solutions. The first one:
class Point:
... def __init__(self, x=0, y=0):
... self.x = x
... self.y = y
... def __sub__(self, other):
... return Point(self.x - other.x, self.y -
On 10 November 2012 19:33, Jennie namedotpor...@gmail.com wrote:
What is the best solution to solve the following problem in Python 3.3?
import math
class Point:
... def __init__(self, x=0, y=0):
... self.x = x
... self.y = y
... def __sub__(self, other):
...
On Sun, Nov 11, 2012 at 12:13 PM, Steven D'Aprano
steve+comp.lang.pyt...@pearwood.info wrote:
Almost but not quite. I assume that, in a full Point class, you would
want Point(0, 0) to count as false in a boolean context. (A falsey
value, like None, [], 0.0, etc.)
I would not assume that. The
On Sat, Nov 10, 2012 at 7:13 PM, Chris Angelico ros...@gmail.com wrote:
I would not assume that. The origin is a point, just like any other.
With a Line class, you could deem a zero-length line to be like a
zero-element list, but Point(0,0) is more like the tuple (0,0) which
is definitely
On Sun, Nov 11, 2012 at 1:43 PM, Ian Kelly ian.g.ke...@gmail.com wrote:
On Sat, Nov 10, 2012 at 7:13 PM, Chris Angelico ros...@gmail.com wrote:
I would not assume that. The origin is a point, just like any other.
With a Line class, you could deem a zero-length line to be like a
zero-element
In article mailman.3549.1352601828.27098.python-l...@python.org,
Ian Kelly ian.g.ke...@gmail.com wrote:
On Sat, Nov 10, 2012 at 7:13 PM, Chris Angelico ros...@gmail.com wrote:
I would not assume that. The origin is a point, just like any other.
With a Line class, you could deem a
On Sat, Nov 10, 2012 at 7:53 PM, Roy Smith r...@panix.com wrote:
In article mailman.3549.1352601828.27098.python-l...@python.org,
Ian Kelly ian.g.ke...@gmail.com wrote:
On Sat, Nov 10, 2012 at 7:13 PM, Chris Angelico ros...@gmail.com wrote:
I would not assume that. The origin is a point,
On Sat, Nov 10, 2012 at 11:43 PM, Ian Kelly ian.g.ke...@gmail.com wrote:
Where I wrote (0,0) is the origin above I was not referring to a
point, not a tuple, but I can see how that was confusing.
What I meant to say is I *was* referring to a point. Gah!
--
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