Replacing values at specific indexes within a list-CodePudding

If I have a list:

characters = ['_', '_', '_', '_', '_']

and a string value

letter = a

and another list

positions = [2, 3]

How can I define a function that would replace the values of the list characters at the positions defined by positions with letter so that the output would be ['_', '_', 'a', 'a', '_'] ?

CodePudding user response：

You can simply use a for loop :

characters = ['_', '_', '_', '_', '_']
positions = [2, 3]
letter = "a"

for position in positions:
    characters[position] = letter

print(characters)
# ['_', '_', 'a', 'a', '_']

CodePudding user response：

You can do it using a for loop. Iterate the positions list. Now, every iteration will represent the individual position. Replace the letter to the characters list. Your code:

def function():
    characters=["_","_","_","_","_"]
    letter="a"
    positions=[2,3]
    for i in positions:        #i values will be 2 and 3. Replace the letter a at position 2 and 3
        characters[i]=letter
    return characters

print(function())