CODEWITHSUNDEEP
python
user10970166
user10970166

Reputation:

Removing vowels by replacing it with index in the String

I'm trying to replace the vowels of a given string with the index of the same. I'm trying to use .replace() and .index() but it doesn't work. I have something like this:

def vowels(w):
vowel = 'aeiou'
for i in w:
    if i in vowel:
        a = w.replace(i, w.index(str(w.find('aeiou'))))
    return a

The idea is this:

input = 'Hi Everyone'

output = 'H1 3v5ry8n10'

Upvotes: 1

Views: 458

Answers (3)

Primusa
Primusa

Reputation: 13498

In this situation using .replace() isn't a good idea. Generally .replace() will do an operation on all vowels in the string, but in this situation you want to replace each vowel with a very specific value. A generator comprehension with join is better here:

vowels = set('aeiou')
s = "Hi Everyone"

replaced = ''.join(str(i) if c.lower() in vowels else c for i, c in enumerate(s))
print(replaced)

Output:

H1 3v5ry8n10

Upvotes: 2

Joyal Mathew
Joyal Mathew

Reputation: 624

replace takes a 3rd argument telling it how many characters to replace. For your purposes you need to replace one each time.

index will give you the position of a character and str will make it a string.

Using lower makes sure all cases are matched.

Replace used characters in w to include duplicates. Make sure it a list and the replacement is not a single character so it works for all strings.

def vowels(w):
    vowel = 'aeiou'
    a = w
    w = list(w)
    for i in w:
        if i.lower() in vowel:
            a = a.replace(i, str(w.index(i)), 1)
            w[w.index(i)] = 0
    return a

In: Hi Everyone
Out: H1 3v5ry8n10

Upvotes: 0

sal
sal

Reputation: 3593

Keeping in mind @Craig Meier's comment, the easiest way to keep track of the position of an element while iterating, is using enumerate. This makes the find operation unnecessary, and the code simpler.

The most Pythonic way to do this is of course what @Primusa proposes, but I think there's value in showing a more step-by-step approach.

def vowels(w):
    vowel = 'aeiou'
    for pos, char in enumerate(w):  # extract a character and remember its position
        if char.lower() in vowel:   # check if it belongs to the check set
            w = w.replace(char, str(pos), 1)  # replace just the first instance
    return w

inp = 'Hi Everyone'
output = vowels(inp)
print(output)

Upvotes: 0

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