Replace Items in List. - Printable Version

Replace Items in List. - Printable Version

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Replace Items in List. - mcmxl22 - Oct-07-2019

I am trying to replace items in a list based on the index. I don't understand why I'm getting the 'index out of range' error.
This is what I have:

spaces = []
word = "word"
guess = "o"
spaces.append("'-'," * len(word))
letter_list = list(word)
locate = letter_list.index(guess)

print(spaces)
spaces[locate] = guess
print(spaces)

This is the error:

Error:["'-','-','-','-',"]
Traceback (most recent call last):
  File "tst.py", line 9, in <module>
    spaces[locate] = guess
IndexError: list assignment index out of range

This is the desired output:

Output:["'-','-','-','-',"]
["'-','o','-','-',"]

RE: Replace Items in List. - buran - Oct-07-2019

Your list has just one element, string. You need to fix line 4

RE: Replace Items in List. - mcmxl22 - Oct-07-2019

I changed line 4 to spaces = ['-' for letter in word].
I also got rid of line 1.
It works!

RE: Replace Items in List. - Larz60+ - Oct-07-2019

If you use exception testing, you can handle guess being incorrect:

word = 'word'
spaces = list('-' * len(word))
guess = 'o'

try:
    locate = word.index(guess)
    spaces[locate] = guess
    print(f"{spaces}")
except ValueError:
    print(f"guess {guess} not in word")

output:

Output:
['-', 'o', '-', '-']

you can put it all in a function to complete