Fixing "str" obejct is not callable -when using set() function Python 3.6.4 : I'm writing some code that is trying to remove duplicates in a string of characters and numbers. I was going to use the set() function to remove duplicate characters but it throws a error... I tried reworking things but nothing seemed to fix the issue... In this block of code I'm generating 10 character long string than after completing that running the string through the set() function.
```
	while(list<=10):
		spacer=random.choice(charlist)
		final=str(final)+str(spacer)
		list+=1
		print(final)
		
	set(final)
```
 THE ERROR: ```Traceback (most recent call last):
  File "", line 45, in <module>
    set(final)
TypeError: 'str' object is not callable```