what is wrong in this program unable to get output??

Question

#i am getting an error msg "NameError: free variable 'b' referenced before assignment in #enclosing scope" help me how to resolve it
def orginal(n):
b=[i for i in n if i not in b]
print(b)
n=[9,3,9,8,2,8,3,2,5,8]
orginal(n)

Answer 1

def orginal(n):
b = []
[b.append(i) for i in n if i not in b]
print ("The list after removing duplicates : " , str(b))
n=[9,3,9,8,2,8,3,2,5,8]
orginal(n)
#this works

Answer 2

you cannot use b in your conditional statement unless it has already been declared. just declare b first as an empty list.
_____________________________

def orginal(n):
b = []
b=[i for i in n if i not in b]
print(b)
n=[9,3,9,8,2,8,3,2,5,8]
orginal(n)

Answer 3

@ethan gallup i tried what u gave but it is not removing duplicates

Answer 4

what is b doing in that list comprehension? Have you assigned some value to it before this expression.

Answer 5

nice! good work!