# [Tutor] FW: Can this be done easly

Roelof Wobben rwobben at hotmail.com
Sun Sep 19 19:02:32 CEST 2010

```

----------------------------------------
> From: rwobben at hotmail.com
> To: __peter__ at web.de
> Subject: RE: [Tutor] Can this be done easly
> Date: Sun, 19 Sep 2010 17:01:22 +0000
>
>
>
>
> ----------------------------------------
>> To: tutor at python.org
>> From: __peter__ at web.de
>> Date: Sun, 19 Sep 2010 18:27:54 +0200
>> Subject: Re: [Tutor] Can this be done easly
>>
>> Roelof Wobben wrote:
>>
>>>> Hint: why does this work:
>>>>
>>>>> def __init__(self, x=0, y=0):
>>>>
>>>> ...while this doesnt:
>>>>
>>>>> def _init_(self, base_point, width=0, length=0):
>>>>
>>>> Peter
>>
>>> Maybe because base_point has no value ?
>>
>> No. One __init__ has two underscores (correct) on each side, the other
>> _init_ only one (wrong).
>>
>> _______________________________________________
>> Tutor maillist - Tutor at python.org
>> To unsubscribe or change subscription options:
>> http://mail.python.org/mailman/listinfo/tutor
>
>

Hello,

Everybody thanks.

For this exercise :

3.Write a function named move_rect that takes a Rectangle and two parameters named dx and dy. It should change the location of the rectangle by adding dx to the x coordinate of corner and adding dy to the y coordinate of corner.

Is this one of the possible solutions :

class Point:
def __init__(self, x=0, y=0):
self.x = x
self.y = y

class Rectangle(object):
def __init__(self, base_point, width=0, length=0):
self.base_point = base_point
self.width = width
self.length = length

def moverect(rectangle, dx, dy):
rechthoek.base_point.y += dy
rechthoek.base_point.x +=dx
return rechthoek

punt = Point(3,4)
rechthoek = Rectangle (punt,20,30)
test = moverect (Rectangle, 4,3)
print rechthoek.base_point.x

Roelof
```