removing locations of characters that repeat

[amankillz2346]

Hello, my program is supposed to print the length of the string inputed, print put characters into a list only if they dont repeat, then print a list of the location of those characters. I am sure there are many ways to do this however, this is the only way i could think of, just setting another variable and adding that variable to a list, however after adding it i need to find out a way to delete the locations of the characters that are duplicate. Thanks.

string = raw_input("Enter string->")
length = len(string)
indx = 0
z = 0
print "The length of the string is", length
chars_stored = []
frequencysite = []
while length > indx:
    if string[indx] == chars_stored:
        indx = indx + 1
    elif string[indx] != chars_stored:
        chars_stored = chars_stored + [(string[indx])]
        frequencysite = frequencysite + [z]
        z = z + 1        
        indx = indx + 1
    
    
print chars_stored
print frequencysite

[Rabbit]

If you're trying to see if an element exists in an array, you use the 'in' operator, not the == operator. As far as deleting the repeats, you don't need to, just don't append to the new list you're building.

[amankillz2346]

how do i do that? (append)

[Rabbit]

You're already doing it. On line 12, you're appending to your new list.

[amankillz2346]

when i run it though it gives me the position for all the characters including the ones that repeat.

[Rabbit]

That's because you haven't fixed the comparison issue I mentioned in post #2.

[amankillz2346]

when i did change it, it gave me the location of the characters in the new list instead of the original

[Rabbit]

That's because you're appending the a variable instead of the indx variable.

[amankillz2346]

thank you!
such a silly mistake but thanks, its greatly appreaciated