python programming/ this code doesnt run when i tried. please help

You only have one line inside your while loop. Also, you used true, a variable that doesn't exist, instead of True, the Python boolean. If you had used True, your while loop only has one statement in it and that statement doesn't ever break the loop, so it'll run forever without doing anything but looping repeatedly.

I think what you need to do is simply indent your work

shopping_list =list()

print("what we pick up at the store?")
print("Enter DONE to stop adding item.")

while True:
   new_item=input(">")

   if new_item == 'DONE':
     break

   shopping_list.append(new_item)

   print("Added! list has {} item.".format(len(shopping_list)))
   continue

print("He's your list:")

for item in shopping_list:
  print(item)

What this does is A. The loop will not run forever anymore. If the user enters DONE it will break. B. It will now add the the input to the list when you enter it.

Hope I helpped!