Who can help me with this?

Question

Hi, I am a beginner, I can't find a way to get this working. Who can explain what I am doing wrong. My intention is to make a def() with this.
The code:

#x="0AASFHHRNH0009uh88888kl"
#remove the items to get this --> "0ASFHRNH09uh8kl"
#
#an other example: "265449683338503333" --> "265496838503"
#an other example: "abcdeefghiij" --> "abcdefghij"
#an other example: "12arh44gooojh" --> "12arh4goj"

x="0AASFHHRNH0009uh88888kl"
a=list(x)
b=list(a)

for i in range(len(a)):
if a[i]==a[i+1]:
del b[i+1]
print(b)

print(a)
print(b)

Answer 1

If you like you can try this comprehension:

lst = list('0AASFHHRNH0009uh88888kl')

res1 =[]
[res1.append(item) for i, item in enumerate(lst) if i == 0 or item != lst[i -1]]
print(''.join(res1))
print('0ASFHRNH09uh8kl') # for comparison with sample only

Answer 2

Yes, I thing I got it! THANKS.
You are a genius!

Answer 3

Goodness! That's something to brew on! Thank you very much.

Answer 4

Wow, thank you WhyFry. I wouldn't be able to write this myself. It's so short and clear, however i don't understand what's happening. Why y=""