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#### loïc Lauréote

I found something allowing to avoid loops.

I use operator overloading.

import math

class Vector:

def __init__(self, x=0, y=0):

self.x=x

self.y=y

def __eq__(self, vB): return (self.x==vB.x) and (self.y==vB.y)

def __add__(self, vB): return Vector(self.x+vB.x,self.y+vB.y)

def __sub__(self, vB): return Vector(self.x-vB.x,self.y-vB.y)

def __mul__(self, c):

if isinstance(c,Vector): return Vector(self.x*c.x,self.y*c.y)

else: return Vector(c*self.x,c*self.y)

def __div__(self, c):

if isinstance(c,Vector): return Vector(self.x/c.x,self.y/c.y)

else: return Vector(c*self.x,c*self.y)

a = Vector(4,5)

b = Vector(6,7)

print a,b

print b*b+a

thx

Date: Wed, 19 Dec 2012 13:38:28 +0100

Subject: Re: calculation on lists

From: (e-mail address removed)

To: (e-mail address removed)

CC: (e-mail address removed)

2012/12/19 loïc Lauréote <[email protected]>:

hi,

I

have a question,

is there a tool to calculate on list ?

something like :

a= [1,1,1,1]

b = [5,9,8,4]

c = a+b*a

print c

[6,10,9,5]

Thx

======

Hi,

for such simpler cases, you may try list comprehensions and probably

the zip(...) function

[a+b*a for a,b in zip([1,1,1,1], [5,9,8,4])] [6, 10, 9, 5]

hth,

vbr