Question

from string import Template
from string import Formatter
import pickle
f=open("C:/begpython/text2.txt",'r')
p='C:/begpython/text2.txt'
f1=open("C:/begpython/text3.txt",'w')
m=[]
i=0
k='a'
while k is not '':
    k=f.readline()
    mi=k.split('  ')
    m=m+[mi]
    i=i+1

print m[1]

f1.write(str(m[3]))
f1.write(str(m[4]))

x=[]
j=0
while j<i:
    k=j-1
    l=j+1
    if j==0 or j==i:
       j=j+1
    else:
        xj=[]
        xj=xj+[j]
        xj=xj+[m[j][2]]
        xj=xj+[m[k][2]]
        xj=xj+[m[l][2]]
        xj=xj+[p]
        x=x+[xj]
        j=j+1

f1.write(','.join(x))




f.close()
f1.close()

It say line 33,xj=xj+m[l][2]
has index error,list out of range

please help
thanks in advance

Answer 1

The IndexError exception (list index out of range) means that you have attempted to access an array using an index that is beyond the bounds of the array. You can see this in action using a simple example like this:

>>> a = [1, 2, 3]
>>> a[2]
3
>>> a[3]
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
IndexError: list index out of range

I can’t exactly follow your code, but what that error means is that either:

• l exceeds the bounds of m, or
• 2 exceeds the bounds of m[l]