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From: "Prasad, Ramit" <ramit.prasad@jpmorgan.com>
To: inshu chauhan <insideshoes@gmail.com>
Subject: RE: Index Error
Thread-Topic: Index Error
Thread-Index: AQHNxyUdDHiwl6qz1E+cZbUnV/nhOZfzEz1g
Date: Tue, 20 Nov 2012 20:39:51 +0000
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Xref: csiph.com comp.lang.python:33661

Can you please post in plain text and stop top-posting? Thanks=2E =0D=0A=0D=
=0Ainshu chauhan wrote:=0D=0A> =0D=0A> def distance(c, p):=0D=0A> =A0=A0=A0=
 dist =3D sqrt(=0D=0A> =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 ((c[0]-p[0])**2) +=
=0D=0A> =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 ((c[1]-p[1])**2) +=0D=0A> =A0=A0=
=A0=A0=A0=A0=A0=A0=A0=A0=A0 ((c[2]-p[2])**2)=0D=0A> =A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0 )=0D=0A> =A0=A0=A0 return dist=0D=0A> =0D=0A> =0D=0A> def Gene=
rateRing(x,y, N): Generates square rings around a point in data which has 3=
00 columns(x) and 3000=0D=0A> rows(y)=0D=0A> =A0=A0=A0 indices =3D []=0D=0A=
> =A0=A0=A0 for i in xrange(-N, N):=0D=0A> =A0=A0=A0=A0=A0=A0=A0 indices=2E=
append((x+i, y-N))=0D=0A> =A0=A0=A0=A0=A0=A0=A0 indices=2Eappend((x+N, y+i)=
)=0D=0A> =A0=A0=A0=A0=A0=A0=A0 indices=2Eappend((x-i, y+N))=0D=0A> =A0=A0=
=A0=A0=A0=A0=A0 indices=2Eappend((x-N, y-i))=0D=0A> =A0=A0=A0 return indice=
s=0D=0A=0D=0ANo, this creates a one dimensional list with 2N elements of wh=
ere each element is a two item tuple=2E=0D=0A=0D=0A=0D=0A> =0D=0A> =0D=0A> =
def ComputeClasses(data):=0D=0A> =A0=A0=A0 radius =3D =2E5=0D=0A> =A0=A0=A0=
 points =3D []=0D=0A> =A0=A0=A0 for cy in xrange(0, data=2Eheight):=0D=0A> =
=A0=A0=A0=A0=A0=A0=A0 for cx in xrange(0, data=2Ewidth):=0D=0A> =0D=0A> =A0=
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 if data[cy,cx] =3D=3D (0=2E0,0=2E0,0=2E0):=
=0D=0A> =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 continue=0D=0A> =A0=
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 else :=0D=0A> =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0=A0 centre =3D data[cy, cx]=0D=0A> =A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0=A0=A0 points=2Eappend(centre)=0D=0A> =0D=0A> =0D=0A> =A0=A0=A0=
=A0=A0=A0=A0=A0=A0=A0=A0 change =3D True=0D=0A> =0D=0A> =A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0=A0 while change:=0D=0A> =0D=0A> =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0=A0 for ring_number in xrange(1, 100):=0D=0A> =A0=A0=A0=A0=A0=
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 change =3D False=0D=0A> =A0=A0=
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 new_indices =3D Generat=
eRing(cx, cy, ring_number)=0D=0A> =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0=A0=A0 print new_indices=0D=0A> =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0=A0=A0=A0=A0=A0 for idx in new_indices:=A0=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
 I need help in this part as I am=0D=0A> unable to device a method in which=
 if the points are out of index,it should stop and=0D=0A> =A0=A0=A0=A0=A0=
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 if idx[0] >=3D 300 a=
nd idx[1] >=3D 3000:=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 go to next centre and st=
art generating=0D=0A> rings from there=2E=2E and again if the index is out =
of range =2E=2E this should repeat=0D=0A> =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 continue=0D=0A> =A0=A0=A0=
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 else :=0D=0A> =
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0=A0 point =3D data[idx[0], idx[1]]=0D=0A=0D=0AYou can use a few differen=
t methods=2E This is just one example=2E=0D=0A=0D=0Afor idx, temp_point in =
enumerate(new_indices):=0D=0A    try:=0D=0A        temp_point[0]=0D=0A     =
   temp_point[1]=0D=0A    except Exception: #Should be IndexError I think=
=2E=0D=0A        print 'idx: {0}\ntemp_point:{1}'=2Eformat(idx, temp_point)=
 =0D=0A        # Possibly add a break or exit so you do not have to=0D=0A  =
      # keep going once you hit a failure=2E=0D=0A    point =3D data[temp_p=
oint[0], temp_point[1]] =0D=0A=0D=0A=0D=0AWhat is `data`? I have not seen a=
ny built-in structure that takes=0D=0Aa tuple in this manner=2E=2E=2Eunless=
 it is a dictionary=2E Or from numpy=2E=0D=0AGiven my lack of knowledge of =
what `data`, it could be the=0D=0Aproblem is there=2E That is one reason I =
accessed `temp_point[0]` and=0D=0A`temp_point[1]` separately=2E=0D=0A=0D=0A=
=0D=0A> =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0=A0 if point =3D=3D (0=2E0, 0=2E0, 0=2E0 ):=0D=0A> =A0=A0=A0=A0=
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0=A0 print point=0D=0A> =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 continue=0D=0A> =A0=A0=A0=A0=
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 else:=
=0D=0A> =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0=A0=A0=A0=A0=A0 dist =3D distance(centre, point)=0D=0A> =A0=A0=
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0 print dist=0D=0A> =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 if=A0 dist < radius :=
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 and rings should be added only w=
hen this=0D=0A> condition is satisfied=0D=0A> =A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0 print point=0D=0A> =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 points=2Eappend(poin=
t)=0D=0A> =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 change =3D True=0D=0A> =A0=A0=A0=
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0=A0=A0=A0 print change=0D=0A> =0D=0A> =0D=0A> =A0=A0=A0=A0=A0=
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 break=0D=0A> =0D=0A>=
 =0D=0A> =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 print points=0D=0A> =0D=0A> =0D=
=0A> ERROR now :=0D=0A> =0D=0A> data loaded=0D=0A> [(296, 403), (298, 403),=
 (298, 405), (296, 405), (297, 403), (298, 404), (297, 405), (296, 404)] =
=2E=2E=2E I am=0D=0A> printing Indices to know what index it dies out=2E=2E=
=0D=0A> =0D=0A> Traceback (most recent call last):=0D=0A> =A0 File "Z:/modu=
les/Classify=2Epy", line 73, in <module>=0D=0A> =A0=A0=A0 ComputeClasses(da=
ta)=0D=0A> =A0 File "Z:/modules/Classify=2Epy", line 49, in ComputeClasses=
=0D=0A> =A0=A0=A0 point =3D data[idx[0], idx[1]]=0D=0A> error: index is out=
 of range=0D=0A> =0D=0A=0D=0AIs that the actual error? If so, then the prob=
lem is not `idx` or =0D=0A`temp_point` but instead `data`=2E If it is not t=
he exact error, please =0D=0Acopy and paste the error message *exactly* as =
given=2E=0D=0A=0D=0A>>> [1][2]=0D=0AIndexError: list index out of range=0D=
=0A>>> (1,2)[3]=0D=0AIndexError: tuple index out of range=0D=0A=0D=0A=0D=0A=
~Ramit=0D=0A=0D=0A=0D=0AThis email is confidential and subject to important=
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