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 - other.x, self.y - other.y)
... def distance(self, point=None):
... p = point if point else Point()
... return math.sqrt((self - p).x ** 2 + (self - p).y ** 2)
What I do not like about this one is that it creates a new 0 point each
time one is needed. Two solutions:
change Point() to point0 in the distance function and create
point0 = Point()
after the class.
-or-
instead of p = line,
px,py = point.x, point.y if point else 0.0, 0.0
Thanks, I like the second one :)
--
Jennie
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