Wheeler, Gabriel wrote:
> Im having trouble completing this function with lists. Im supposed to
> create a function that will let me know if there are repeating elements so
> I wrote this and am not sure where the error lies.
It helps you (and us) a lot if you clearly state the error you are seeing.
If your script bails out with an error post the complete traceback. If all
appears to be working, but you get a wrong or unexpected result say what you
get and what you expected.
Running your code I get
$ cat check_dupes.py
list = [1,2,2,2,3,4]
def duplicate(list):
for i in range(len[list]):
if list.count(i) > 1:
return True
print duplicate(list)
$ python check_dupes.py
Traceback (most recent call last):
File "check_dupes.py", line 8, in <module>
print duplicate(list)
File "check_dupes.py", line 4, in duplicate
for i in range(len[list]):
TypeError: 'builtin_function_or_method' object has no attribute
'__getitem__'
Looking at the line shown in the traceback
for i in range(len[list]):
what could be the function you are not calling but asking for that strange
__getitem__ attribute? Hint:
>>> def hello(name):
... print "Hello,", name
...
>>> hello("Gabriel")
Hello, Gabriel
>>> hello["Gabriel"]
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: 'function' object has no attribute '__getitem__'
That sure looks similar to your error message.
Once you have fixed that I recommend that you add a print statement
def duplicate(list):
for i in range(len[list]): # must be fixed
print "looking for", i
if list.count(i) > 1:
return True
You'll see that you are looking for items that are not in the list? Can you
figure out why?
If not, call the function with another list
duplicate(["a", "b", "b", "b", "c", "d"])
> It is supposed to count
> the number of times a number appears and if its greater than 1 then it
> will say True.
>
>
> #Problem 3
>
> list = [1,2,2,2,3,4]
>
> def duplicate(list):
> for i in range(len[list]):
> if list.count(i) > 1:
> return True
>
>
> print duplicate(list)
_______________________________________________
Tutor maillist - Tutor@python.org
To unsubscribe or change subscription options:
https://mail.python.org/mailman/listinfo/tutor
