Python: String replace index

Question

I mean, i want to replace str[9:11] for another string. If I do str.replace(str[9:11], \"###\") It doesn\'t work, because the sequence [9:11] can b

Answer 1

Here is a sample code:

word = "astalavista"
index = 0
newword = ""
addon = "xyz"
while index < 8:
    newword = newword + word[index]
    index += 1
    ind = index

i = 0
while i < len(addon):
    newword = newword + addon[i]
    i += 1

while ind < len(word):
    newword = newword + word[ind]
    ind += 1

print newword