How to replace multiple characters with different input on same string python

Question

I am attempting to replace multiple letters within a string, I want the vowels to be replaced by the users input, and my current code replaces all the vowels with the same letters, however I want to replace the vowels with different user inputs. Below is an example of what I would like, and the code below that.

What I want

input1 = zz input2 = xx input3 = yolo output = yzzlxx

What I have

input1 = zz input2 = xx input3 = yolo output = yzzlzz

Here is my code.

def vwl(): syl1 = input("Enter your first syllable: ") syl2 = input("Enter the second syllable: ") translate = input("Enter word to replace vowels in: ") for ch in ['a','e','i','o','u']: if ch in translate: translate=translate.replace(ch,syl1,) for ch in ['a','e','i','o','u']: if syl1 in translate: translate=translate.replace(ch,syl2,) print (translate)

Ryan: Is this a homework question that you are doing? If so, please use the "homework" tag. — Mark Hildreth
– Mark Hildreth, Commented Sep 24, 2012 at 15:30
@MarkHildreth: actually, the homework tag has recently been deprecated. See here. — DSM
– DSM, Commented Sep 24, 2012 at 15:31

Andy Hayden · Accepted Answer · 2012-09-24 15:39:32Z

3

The method replace takes an additional argument count:

translate=translate.replace(ch,syl1,1) break # finish the for loop for syl1

will only replace the first instance of ch and break will ensure you don't replace any subsequent vowels with syl1.

Similarly:

translate=translate.replace(ch,syl2,1) break # finish the for loop

edited Sep 24, 2012 at 15:39

answered Sep 24, 2012 at 15:31

Andy Hayden

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3 Comments

mgilson Over a year ago

This doesn't help if the user inputs yoli (he'll still get yxxlxx).

mgilson Over a year ago

it's a bit weird of a requirement ... (using count on str.replace was my first intuition as well)

mgilson Over a year ago

Yes, I think that does it. (I'm glad you didn't delete your answer. I like to avoid re when possible) (+1).

mgilson · Accepted Answer · 2012-09-24 15:33:28Z

You can use regular expressions:

translate = re.sub('a|e|i|o|u',input1,translate,count=1) translate = re.sub('a|e|i|o|u',input2,translate,count=1)

Example:

>>> input1 = 'zz' >>> input2 = 'xx' >>> translate = 'yolo' >>> import re >>> translate = re.sub('a|e|i|o|u',input1,translate,count=1) >>> translate 'yzzlo' >>> translate = re.sub('a|e|i|o|u',input2,translate,count=1) >>> translate 'yzzlxx'

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