How to capitalize 1st and 4th characters of a string?

Question

OLD MACDONALD: Write a function that capitalizes the first and fourth letters of a name

I'm trying to write this in different ways and I also feel like there's an easier way to do this. Cant, you directly apply it without getting all the other words of a string? Or a split or something?

Here is one of my attempts at trying it another way. I'm trying to do it with a for AND an if statement too. Any help is appreciated.

def old_macdonald(words):
    wordletter = words[0]
    fourthletter = words[3]
    newword = []

    for i,l in enumerate(words):
        if i[0]:
            newword = l.capatalize
            return newword
        if i[3]:
            newword = l.capatalize
    return newword

Does this answer your question? [change some lowercase letters to uppercase in string](https://stackoverflow.com/questions/8217650/change-some-lowercase-letters-to-uppercase-in-string) — Gino Mempin, Jul 09 '20 at 23:53

score 4 · Answer 1 · answered Jan 07 '21 at 12:45

4

This is the most legible way IMO

def old_macdonald(name):
    mylist = list(name)
    mylist[0] = mylist[0].upper()
    mylist[3] = mylist[3].upper()
    return ''.join(mylist)

answered Jan 07 '21 at 12:45

FlashGodOfSpeed

41
2

score 1 · Answer 2 · edited Sep 17 '20 at 06:42

1

def old_macdonald(name):
    letters = list(name)
    for index in range(len(name)):
        if index == 0:
            letters[index] = letters[index].upper()
        elif index == 3:
            letters[index] = letters[index].upper()
    return "".join(letters)

This one worked for me

edited Sep 17 '20 at 06:42

ggorlen

44,755
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answered Sep 17 '20 at 06:23

Guseyn013

63
9

2

Welcome to SO and thanks for answering! Why iterate with a loop when you already have the indexes? Lists have random access, so you can say `letters[0] = letters[0].upper()`. – ggorlen Sep 17 '20 at 06:44

score 1 · Answer 3 · answered Apr 02 '21 at 12:20

1

this code will make first and forth element of the string Capital.

def cap(name):
    first = name[0]
    mid = name[1:3]
    second = name[3]
    rest = name[4:]    
    return first.upper() + mid + second.upper() + rest


cap('kahasdfn')

answered Apr 02 '21 at 12:20

Zubair Shams

41
4

DarrylG · Answer 4 · 2019-09-08T19:33:09.740

0

def old_macdonald(s):
    return ''.join([s[:1].upper(), s[1:3], s[3:4].upper(), s[4:]])

# s[:1] -  letter index 0 (first)
# s[1:3] - letters index 1-2
# s[3:4] - letter index 3 (fourth)
# s[4:]  - letters index 4 onward
test_string = "abcdefghijklmnopqr"
print(old_macdonald(test_string )) # AbcDefghijklmnopqr

edited Sep 08 '19 at 19:33

answered Sep 08 '19 at 19:27

DarrylG

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score 0 · Answer 5 · answered Sep 08 '19 at 19:30

Here's one way. You do need to split the string into a list of characters to change individual characters, because strings are immutable, and then use join afterward to convert them back into a string.

def old_macdonald(name):
    letters = list(name)
    for letter_to_capitalize in [1, 4]:
        if len(letters) >= letter_to_capitalize:
            letters[letter_to_capitalize - 1] = letters[letter_to_capitalize - 1].upper()

    return "".join(letters)

score 0 · Answer 6 · answered Sep 08 '19 at 19:32

0

A pretty simple and modifiable example.

def old_mcdonald(word):
    indexes = (0,3) #letters i want to cap
    new_word = "".join([v.capitalize() if i in indexes else v for i,v in enumerate(word)])
    return new_word

answered Sep 08 '19 at 19:32

TheLazyScripter

2,541
1
10
19

score 0 · Answer 7 · answered Sep 08 '19 at 19:54

0

I like writing it this way:

def old_macdonald(word):
    indices = (0, 4)
    return ''.join(c.capitalize() if index in indices else c for index, c in enumerate(word))

Although it's a little long, so you might prefer writing it more clearly as:

def old_macdonald(word):
    indices = (0, 4)
    new_string = []
    for index, c in enumerate(word):
        new_string.append(c.capitalize() if index in indices else c)
    return ''.join(new_string)

answered Sep 08 '19 at 19:54

Christopher Geiger

179
1
10

Oops, it looks like TheLazyScripter already said almost the exact same thing – Christopher Geiger Sep 08 '19 at 20:00

score 0 · Answer 8 · answered Jul 09 '20 at 19:33

0

def old_macdonald(s):
    w=""
    for i in s:
        t=s.index(i)
        if t==0:
            w=w+i.upper()
        elif(t==3):
            w=w+i.upper()
        else:
            w=w+i
    print(w)
old_macdonald("aman")

answered Jul 09 '20 at 19:33

Khushi Sharma

1
1

This answer was reviewed in the [Low Quality Queue](https://stackoverflow.com/help/review-low-quality). Here are some guidelines for [How do I write a good answer?](https://stackoverflow.com/help/how-to-answer). Code only answers are **not considered good answers**, and are likely to be downvoted and/or deleted because they are **less useful** to a community of learners. It's only obvious to you. Explain what it does, and how it's different / **better** than existing answers. – Trenton McKinney Jul 25 '22 at 21:43

score 0 · Answer 9 · answered Sep 17 '20 at 06:52

0

def old_macdonald(s):
    return s[0:3].capitalize() + s[3:].capitalize()

https://ideone.com/2D0qbZ

answered Sep 17 '20 at 06:52

Marek R

32,568
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score 0 · Answer 10 · answered Apr 18 '21 at 13:15

0

This one worked

def old_macdonald(name):
    word = ''
    for index,letter in enumerate(name):
        if index == 0 or index == 3:
            letter = name[index].capitalize()
            word += letter
        else:
            word += letter
    return word

answered Apr 18 '21 at 13:15

Snigdha Sambit Aryakumar

77
2

This answer was reviewed in the [Low Quality Queue](https://stackoverflow.com/help/review-low-quality). Here are some guidelines for [How do I write a good answer?](https://stackoverflow.com/help/how-to-answer). Code only answers are **not considered good answers**, and are likely to be downvoted and/or deleted because they are **less useful** to a community of learners. It's only obvious to you. Explain what it does, and how it's different / **better** than existing answers. – Trenton McKinney Jul 25 '22 at 21:42

How to capitalize 1st and 4th characters of a string?

10 Answers10

this code will make first and forth element of the string Capital.