"CJ" wrote:
> What does worry me, is that I can't seem to get the program by a
> certain spot. It keeps giving me the same error, and I don't know why.
quite often, exception messages means exactly what they say; if
you get an index error, it's because you're trying to fetch an item
that doesn't exist.
for simple debugging, the "print" statement is your friend:
> ttllst=[4,3,45,3]
> cnto=0
> cntt=1
> rept=-1
>
> print cnto
> print cntt
> print ttllst[cnto]
> print ttllst[cntt]
> choice=raw_input("Begin? ")
> if choice == "yes" or choice == "y":
> while cnto<>len(ttllst)+1:
print cnto, cntt, len(ttllst)
> if ttllst[cnto]==ttllst[cntt]:
> rept=rept+1
> if cntt==len(ttllst):
> print ttllst[cnto],"appears in the list",rept,"times."
> cntt=-1
> cnto=cnto+1
> rept=-1
> cntt=cntt+1
> print "done."
with that in place, I get
Begin? y
0 1 4
0 2 4
0 3 4
0 4 4
Traceback (most recent call last):
File "test.py", line 14, in ?
if ttllst[cnto]==ttllst[cntt]:
IndexError: list index out of range
which means that your second list index (cntt) is too large.
figuring out how to fix that is left as an etc etc.
</F>
PS. when you've sorted this out, you might wish to check out the
"count" method on list objects:
>>> help(list.count)
Help on method_descriptor:
count(...)
L.count(value) -> integer -- return number of occurrences of value
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