Python

Python RSS

Pythagoras?

Please support our Python advertiser: Programming Forums - DaniWeb Sister Site

Thread Solved

•

Join Date: Nov 2009

Posts: 39

Reputation: gangster88 is an unknown quantity at this point

Solved Threads: 0

gangster88 gangster88 is offline

Offline

Light Poster

Pythagoras?

25 Days Ago

I have to get pthagaros to get the distance between 2 points. so the function distanceBetweenPoints(Point(1, 2), Point(4, 6)) should result in 5.0. the parameters are supposed to be P1, P2, which i think i have done?. The get an error when i try to execute this?.. help please

def distanceBetweenPoints(p1, p2):
return float(math.sqrt((p2-p1)**2+(p2-p1)**2))

•

Join Date: Nov 2007

Posts: 147

Reputation: mn_kthompson is an unknown quantity at this point

Solved Threads: 32

mn_kthompson mn_kthompson is offline

Offline

Junior Poster

25 Days Ago

What error are you getting? It seems to run fine for me.

 Help with Code Tags 
 python Syntax (Toggle Plain Text) 
>>> import math
>>> def distance(p1, p2):
...    return float(math.sqrt((p2-p1)**2+(p2-p1)**2))
... 
>>> print distance(1,6)
7.07106781187
>>>
>>> import math
>>> def distance(p1, p2):
...    return float(math.sqrt((p2-p1)**2+(p2-p1)**2))
... 
>>> print distance(1,6)
7.07106781187
>>>

•

Join Date: Dec 2006

Posts: 1,024

Reputation: woooee is a jewel in the rough

Solved Threads: 288

woooee

Online

Veteran Poster

25 Days Ago

•

The get an error when i try to execute this?

Not enough info for anyone to help (could be an indentation error, or could be in the calcs). First add some print statements for the individual calcs to isolate the error, and post the specific error message.

 Help with Code Tags 
 Python Syntax (Toggle Plain Text) 
def distance_between_points(p1, p2):
   p2subp1 = p2-p1
   p1subp2 = p1-p2
   print "after subtraction", p2subp1, p1subp2
   ## one print for each step
 
point_1 = (1, 2)
point_2 = (4, 6)
distance_between_points(point_1, point_2)
def distance_between_points(p1, p2):
   p2subp1 = p2-p1
   p1subp2 = p1-p2
   print "after subtraction", p2subp1, p1subp2
   ## one print for each step

point_1 = (1, 2)
point_2 = (4, 6)
distance_between_points(point_1, point_2)

Last edited by woooee; 25 Days Ago at 8:08 pm.

Linux counter #99383

•

Join Date: Nov 2009

Posts: 33

Reputation: jaison2 is an unknown quantity at this point

Solved Threads: 1

jaison2

Offline

Light Poster

25 Days Ago

Last edited by jaison2; 25 Days Ago at 8:15 pm.

•

Join Date: Nov 2009

Posts: 39

Reputation: gangster88 is an unknown quantity at this point

Solved Threads: 0

gangster88 gangster88 is offline

Offline

Light Poster

25 Days Ago

but the thing is we need it in this form.. distanceBetweenPoints(Point(1, 2), Point(4, 6)), so when we call the function and type it in we get the answer...

•

Join Date: Jul 2008

Posts: 932

Reputation: Gribouillis is a jewel in the rough

Solved Threads: 216

Gribouillis Gribouillis is online now

Online

Posting Shark

25 Days Ago

According to your previous post, I think that you are using the "graphics.py" module like this one. In that case, since p1 and p2 are not numbers but Points, you must use first p1.getX() and p1.getY() to get the coordinates of the points.

Last edited by Gribouillis; 25 Days Ago at 8:41 pm.

•

Join Date: Nov 2009

Posts: 39

Reputation: gangster88 is an unknown quantity at this point

Solved Threads: 0

gangster88 gangster88 is offline

Offline

Light Poster

25 Days Ago

yeah but how do you do that?.. any examples you got?

•

Join Date: Jul 2008

Posts: 932

Reputation: Gribouillis is a jewel in the rough

Solved Threads: 216

Gribouillis Gribouillis is online now

Online

Posting Shark

25 Days Ago

For example

 Help with Code Tags 
 python Syntax (Toggle Plain Text) 
def myfunction(pointA, pointB):
    xa, ya = pointA.getX(), pointA.getY()
    xb, yb = pointB.getX(), pointB.getY()
    do_something_with(xa, ya, xb, yb)
def myfunction(pointA, pointB):
    xa, ya = pointA.getX(), pointA.getY()
    xb, yb = pointB.getX(), pointB.getY()
    do_something_with(xa, ya, xb, yb)

Last edited by Gribouillis; 25 Days Ago at 7:50 am.

•

Join Date: Nov 2009

Posts: 39

Reputation: gangster88 is an unknown quantity at this point

Solved Threads: 0

gangster88 gangster88 is offline

Offline

Light Poster

25 Days Ago

anything around these lines?

def distanceBetweenPoints(p1, p2):
x1, y1 = P1.getX(), P1.getY()
x2, y2 = P2.getX(), P2.getY()
distance = float(math.sqrt((x2-x1)**2+(y2-y1)**2))

Last edited by gangster88; 25 Days Ago at 8:52 am.

•

Join Date: Jul 2008

Posts: 932

Reputation: Gribouillis is a jewel in the rough

Solved Threads: 216

Gribouillis Gribouillis is online now

Online

Posting Shark

#10

25 Days Ago

•

Originally Posted by gangster88

anything around these lines?

def distanceBetweenPoints(p1, p2):
x1, y1 = P1.getX(), P1.getY()
x2, y2 = P2.getX(), P2.getY()
distance = float(math.sqrt((x2-x1)**2+(y2-y1)**2))

The parameters p1 and p2 should not become P1 ad P2 the next line. Also, what does pyhon say ?

Thread Tools	Search this Thread
Show Printable Version Email this Page

DaniWeb Message

Cancel Changes