Question

I just started with python..
I got an error with for loop..
What is the problem ??

  Traceback (most recent call last):
  File "userentry.py", line 34, in <module>
    userentry(p,i)
  File "userentry.py", line 26, in userentry
    for cl in len(mylist):
  TypeError: 'int' object is not iterable

Please help me

Answer 1

You can just iterate over the list, you don’t iterate over the length of the list.

for cl in mylist:
    # do stuff

If you need to keep track of the index of the current item, use enumerate:

for idx, item in enumerate(mylist):
    # idx = index of current item
    # item = current item

When you try to do for cl in len(mylist), that’s like saying for cl in 5 (if mylist has length of 5), which doesn’t really make sense. If you want to just iterate over the indices of a list, it’s best to use the enumerate example above, but you can also do

for i in range(len(mylist)):
    # mylist[i] is the ith item in the list

Though there are very few reasons to do this instead of just using the enumerate version above.