List index out of range.

Question

Why does this return list index out of range on l=block [p]?

```def encode (m):
m=m.split()
msg=[]
for block in m:
ltrs=[]
for p in range(0,7):
l=block[p]
ltrs.append(enc(l,p))
ltrs=''.join(ltrs)
msg.append(ltrs)
msg=' '.join(msg)
return msg```

Answer 1

Do you understand what the function is supposed to do?
It may error if you give it too short words as parameter (less than 7 characters).

Answer 2

If not all your strings are 7 character long, then range(0,7) is not good.
Try like this:
for index, char in enumerate(block):
ltrs.append(enc(char, index))

enumerate is great if you want to track the position AND the value of each element in a collection at the same time.

Answer 3

Tibor Santa if you see the updated code above, I just wanted to cut out the extra bits at first. The problem actually is string index not list index I didn't realize at first.