How to capitalize specific letters in a string given certain rules

I am massaging strings so that the 1st letter of the string and the first letter following either a dash or a slash needs to be capitalized.

So the following string:

test/string - this is a test string

Should look look like so:

Test/String - This is a test string

So in trying to solve this problem my 1st idea seems like a bad idea - iterate the string and check every character and using indexing etc. determine if a character follows a dash or slash, if it does set it to upper and write out to my new string.

def correct_sentence_case(test_phrase):



corrected_test_phrase = ''



firstLetter = True



for char in test_phrase:



    if firstLetter:



        corrected_test_phrase += char.upper()



        firstLetter = False



    #elif char == '/':

    else:



        corrected_test_phrase += char

This just seems VERY un-pythonic. What is a pythonic way to handle this?

Something along the lines of the following would be awesome but I can't pass in both a dash and a slash to the split:

corrected_test_phrase = ' - '.join(i.capitalize() for i in test_phrase.split(' - '))

Which I got from this SO:

Convert UPPERCASE string to sentence case in Python

Any help will be appreciated :)

edited Dec 27 '18 at 20:26

asked Dec 27 '18 at 20:17

beginAgain

10410

Why doesn't your "wanted way" work? Split, capitalize and join
– SimonF
Dec 27 '18 at 20:21

@SimonF Because it doesn't produce Test/String - This is a test string but Test/string - This is a test string
– BoarGules
Dec 27 '18 at 20:24

@SimonF - It works super nicely but I can't pass both dashes and slashes to the split - I probably should have said that in my question - it is unclear - ty
– beginAgain
Dec 27 '18 at 20:25

1

Explicit is better than implicit. Simple is better than complex. Sparse is better than dense. Readability counts.; do it in more than one step.
– Pedro Rodrigues
Dec 27 '18 at 20:27

1

You have two different criteria for splitting. The one delimiter is " - " and the other is "". Do your split/capitalize in 2 passes. Split first on " - " into a list and then split every element of that list on "".
– BoarGules
Dec 27 '18 at 20:27

|
show 2 more comments

I am massaging strings so that the 1st letter of the string and the first letter following either a dash or a slash needs to be capitalized.

So the following string:

test/string - this is a test string

Should look look like so:

Test/String - This is a test string

def correct_sentence_case(test_phrase):



corrected_test_phrase = ''



firstLetter = True



for char in test_phrase:



    if firstLetter:



        corrected_test_phrase += char.upper()



        firstLetter = False



    #elif char == '/':

    else:



        corrected_test_phrase += char

This just seems VERY un-pythonic. What is a pythonic way to handle this?

Something along the lines of the following would be awesome but I can't pass in both a dash and a slash to the split:

corrected_test_phrase = ' - '.join(i.capitalize() for i in test_phrase.split(' - '))

Which I got from this SO:

Convert UPPERCASE string to sentence case in Python

Any help will be appreciated :)

edited Dec 27 '18 at 20:26

asked Dec 27 '18 at 20:17

beginAgain

10410

Why doesn't your "wanted way" work? Split, capitalize and join
– SimonF
Dec 27 '18 at 20:21

@SimonF Because it doesn't produce Test/String - This is a test string but Test/string - This is a test string
– BoarGules
Dec 27 '18 at 20:24

@SimonF - It works super nicely but I can't pass both dashes and slashes to the split - I probably should have said that in my question - it is unclear - ty
– beginAgain
Dec 27 '18 at 20:25

1

Explicit is better than implicit. Simple is better than complex. Sparse is better than dense. Readability counts.; do it in more than one step.
– Pedro Rodrigues
Dec 27 '18 at 20:27

1

You have two different criteria for splitting. The one delimiter is " - " and the other is "". Do your split/capitalize in 2 passes. Split first on " - " into a list and then split every element of that list on "".
– BoarGules
Dec 27 '18 at 20:27

|
show 2 more comments

I am massaging strings so that the 1st letter of the string and the first letter following either a dash or a slash needs to be capitalized.

So the following string:

test/string - this is a test string

Should look look like so:

Test/String - This is a test string

def correct_sentence_case(test_phrase):



corrected_test_phrase = ''



firstLetter = True



for char in test_phrase:



    if firstLetter:



        corrected_test_phrase += char.upper()



        firstLetter = False



    #elif char == '/':

    else:



        corrected_test_phrase += char

This just seems VERY un-pythonic. What is a pythonic way to handle this?

Something along the lines of the following would be awesome but I can't pass in both a dash and a slash to the split:

corrected_test_phrase = ' - '.join(i.capitalize() for i in test_phrase.split(' - '))

Which I got from this SO:

Convert UPPERCASE string to sentence case in Python

Any help will be appreciated :)

edited Dec 27 '18 at 20:26

asked Dec 27 '18 at 20:17

beginAgain

10410

I am massaging strings so that the 1st letter of the string and the first letter following either a dash or a slash needs to be capitalized.

So the following string:

test/string - this is a test string

Should look look like so:

Test/String - This is a test string

def correct_sentence_case(test_phrase):



corrected_test_phrase = ''



firstLetter = True



for char in test_phrase:



    if firstLetter:



        corrected_test_phrase += char.upper()



        firstLetter = False



    #elif char == '/':

    else:



        corrected_test_phrase += char

This just seems VERY un-pythonic. What is a pythonic way to handle this?

Something along the lines of the following would be awesome but I can't pass in both a dash and a slash to the split:

corrected_test_phrase = ' - '.join(i.capitalize() for i in test_phrase.split(' - '))

Which I got from this SO:

Convert UPPERCASE string to sentence case in Python

Any help will be appreciated :)

python string

edited Dec 27 '18 at 20:26

asked Dec 27 '18 at 20:17

beginAgain

10410

edited Dec 27 '18 at 20:26

asked Dec 27 '18 at 20:17

beginAgain

10410

edited Dec 27 '18 at 20:26

asked Dec 27 '18 at 20:17

beginAgain

10410

asked Dec 27 '18 at 20:17

beginAgain

10410

asked Dec 27 '18 at 20:17

beginAgain

10410

Why doesn't your "wanted way" work? Split, capitalize and join
– SimonF
Dec 27 '18 at 20:21

@SimonF Because it doesn't produce Test/String - This is a test string but Test/string - This is a test string
– BoarGules
Dec 27 '18 at 20:24

@SimonF - It works super nicely but I can't pass both dashes and slashes to the split - I probably should have said that in my question - it is unclear - ty
– beginAgain
Dec 27 '18 at 20:25

1

Explicit is better than implicit. Simple is better than complex. Sparse is better than dense. Readability counts.; do it in more than one step.
– Pedro Rodrigues
Dec 27 '18 at 20:27

1

You have two different criteria for splitting. The one delimiter is " - " and the other is "". Do your split/capitalize in 2 passes. Split first on " - " into a list and then split every element of that list on "".
– BoarGules
Dec 27 '18 at 20:27

|
show 2 more comments

Why doesn't your "wanted way" work? Split, capitalize and join
– SimonF
Dec 27 '18 at 20:21

@SimonF Because it doesn't produce Test/String - This is a test string but Test/string - This is a test string
– BoarGules
Dec 27 '18 at 20:24

@SimonF - It works super nicely but I can't pass both dashes and slashes to the split - I probably should have said that in my question - it is unclear - ty
– beginAgain
Dec 27 '18 at 20:25

1

Explicit is better than implicit. Simple is better than complex. Sparse is better than dense. Readability counts.; do it in more than one step.
– Pedro Rodrigues
Dec 27 '18 at 20:27

1

You have two different criteria for splitting. The one delimiter is " - " and the other is "". Do your split/capitalize in 2 passes. Split first on " - " into a list and then split every element of that list on "".
– BoarGules
Dec 27 '18 at 20:27

Why doesn't your "wanted way" work? Split, capitalize and join
– SimonF
Dec 27 '18 at 20:21

@SimonF Because it doesn't produce Test/String - This is a test string but Test/string - This is a test string
– BoarGules
Dec 27 '18 at 20:24

@SimonF - It works super nicely but I can't pass both dashes and slashes to the split - I probably should have said that in my question - it is unclear - ty
– beginAgain
Dec 27 '18 at 20:25

Explicit is better than implicit. Simple is better than complex. Sparse is better than dense. Readability counts.; do it in more than one step.
– Pedro Rodrigues
Dec 27 '18 at 20:27

You have two different criteria for splitting. The one delimiter is " - " and the other is "". Do your split/capitalize in 2 passes. Split first on " - " into a list and then split every element of that list on "".
– BoarGules
Dec 27 '18 at 20:27

|
show 2 more comments

3 Answers
3

active

oldest

votes

I was able to accomplish the desired transformation with a regular expression:

import re

capitalized = re.sub(

    '(^|[-/])s*([A-Za-z])', lambda match: match[0].upper(), phrase)

The expression says "anywhere you match either the start of the string, ^, or a dash or slash followed by maybe some space and a word character, replace the word character with its uppercase."

demo

edited Dec 27 '18 at 20:34

answered Dec 27 '18 at 20:30

wbadart

1,7971619

7 seconds ahead of me, nice. Just be wary with using w as it matches any of [a-zA-Z0-9_] (In a second thought it doesn't really matter in this particular case)
– DeepSpace
Dec 27 '18 at 20:31

Haha I noticed that. Very astute of you, I'll make the tweak
– wbadart
Dec 27 '18 at 20:33

Wow - just tested and it works. Why do I always make stuff more complicated than it needs to be - ty :)
– beginAgain
Dec 27 '18 at 20:35

add a comment |

If you don't want to go with a messy splitting-joining logic, go with a regex:

import re



string = 'test/string - this is a test string'



print(re.sub(r'(^([a-z])|(?<=[-/])s?([a-z]))',

             lambda match: match.group(1).upper(), string))

# Test/String - This is a test string

answered Dec 27 '18 at 20:30

DeepSpace

37.1k44169

add a comment |

Using double split

import re

' - '.join([i.strip().capitalize() for i in re.split(' - ','/'.join([i.capitalize() for i in re.split('/',test_phrase)]))])

answered Dec 27 '18 at 20:31

mad_

3,60211020

add a comment |

Your Answer

StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");

StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);

StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});

function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});

}
});

draft saved

draft discarded

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53950410%2fhow-to-capitalize-specific-letters-in-a-string-given-certain-rules%23new-answer', 'question_page');
}
);

Post as a guest

Name

Required, but never shown

3 Answers
3

active

oldest

votes

3 Answers
3

active

oldest

votes

I was able to accomplish the desired transformation with a regular expression:

import re

capitalized = re.sub(

    '(^|[-/])s*([A-Za-z])', lambda match: match[0].upper(), phrase)

The expression says "anywhere you match either the start of the string, ^, or a dash or slash followed by maybe some space and a word character, replace the word character with its uppercase."

demo

edited Dec 27 '18 at 20:34

answered Dec 27 '18 at 20:30

wbadart

1,7971619

7 seconds ahead of me, nice. Just be wary with using w as it matches any of [a-zA-Z0-9_] (In a second thought it doesn't really matter in this particular case)
– DeepSpace
Dec 27 '18 at 20:31

Haha I noticed that. Very astute of you, I'll make the tweak
– wbadart
Dec 27 '18 at 20:33

Wow - just tested and it works. Why do I always make stuff more complicated than it needs to be - ty :)
– beginAgain
Dec 27 '18 at 20:35

add a comment |

I was able to accomplish the desired transformation with a regular expression:

import re

capitalized = re.sub(

    '(^|[-/])s*([A-Za-z])', lambda match: match[0].upper(), phrase)

The expression says "anywhere you match either the start of the string, ^, or a dash or slash followed by maybe some space and a word character, replace the word character with its uppercase."

demo

edited Dec 27 '18 at 20:34

answered Dec 27 '18 at 20:30

wbadart

1,7971619

7 seconds ahead of me, nice. Just be wary with using w as it matches any of [a-zA-Z0-9_] (In a second thought it doesn't really matter in this particular case)
– DeepSpace
Dec 27 '18 at 20:31

Haha I noticed that. Very astute of you, I'll make the tweak
– wbadart
Dec 27 '18 at 20:33

Wow - just tested and it works. Why do I always make stuff more complicated than it needs to be - ty :)
– beginAgain
Dec 27 '18 at 20:35

add a comment |

I was able to accomplish the desired transformation with a regular expression:

import re

capitalized = re.sub(

    '(^|[-/])s*([A-Za-z])', lambda match: match[0].upper(), phrase)

The expression says "anywhere you match either the start of the string, ^, or a dash or slash followed by maybe some space and a word character, replace the word character with its uppercase."

demo

edited Dec 27 '18 at 20:34

answered Dec 27 '18 at 20:30

wbadart

1,7971619

I was able to accomplish the desired transformation with a regular expression:

import re

capitalized = re.sub(

    '(^|[-/])s*([A-Za-z])', lambda match: match[0].upper(), phrase)

The expression says "anywhere you match either the start of the string, ^, or a dash or slash followed by maybe some space and a word character, replace the word character with its uppercase."

demo

edited Dec 27 '18 at 20:34

answered Dec 27 '18 at 20:30

wbadart

1,7971619

edited Dec 27 '18 at 20:34

answered Dec 27 '18 at 20:30

wbadart

1,7971619

answered Dec 27 '18 at 20:30

wbadart

1,7971619

answered Dec 27 '18 at 20:30

wbadart

1,7971619

7 seconds ahead of me, nice. Just be wary with using w as it matches any of [a-zA-Z0-9_] (In a second thought it doesn't really matter in this particular case)
– DeepSpace
Dec 27 '18 at 20:31

Haha I noticed that. Very astute of you, I'll make the tweak
– wbadart
Dec 27 '18 at 20:33

Wow - just tested and it works. Why do I always make stuff more complicated than it needs to be - ty :)
– beginAgain
Dec 27 '18 at 20:35

add a comment |

7 seconds ahead of me, nice. Just be wary with using w as it matches any of [a-zA-Z0-9_] (In a second thought it doesn't really matter in this particular case)
– DeepSpace
Dec 27 '18 at 20:31

Haha I noticed that. Very astute of you, I'll make the tweak
– wbadart
Dec 27 '18 at 20:33

Wow - just tested and it works. Why do I always make stuff more complicated than it needs to be - ty :)
– beginAgain
Dec 27 '18 at 20:35

7 seconds ahead of me, nice. Just be wary with using w as it matches any of [a-zA-Z0-9_] (In a second thought it doesn't really matter in this particular case)
– DeepSpace
Dec 27 '18 at 20:31

Haha I noticed that. Very astute of you, I'll make the tweak
– wbadart
Dec 27 '18 at 20:33

Wow - just tested and it works. Why do I always make stuff more complicated than it needs to be - ty :)
– beginAgain
Dec 27 '18 at 20:35

add a comment |

If you don't want to go with a messy splitting-joining logic, go with a regex:

import re



string = 'test/string - this is a test string'



print(re.sub(r'(^([a-z])|(?<=[-/])s?([a-z]))',

             lambda match: match.group(1).upper(), string))

# Test/String - This is a test string

answered Dec 27 '18 at 20:30

DeepSpace

37.1k44169

add a comment |

If you don't want to go with a messy splitting-joining logic, go with a regex:

import re



string = 'test/string - this is a test string'



print(re.sub(r'(^([a-z])|(?<=[-/])s?([a-z]))',

             lambda match: match.group(1).upper(), string))

# Test/String - This is a test string

answered Dec 27 '18 at 20:30

DeepSpace

37.1k44169

add a comment |

If you don't want to go with a messy splitting-joining logic, go with a regex:

import re



string = 'test/string - this is a test string'



print(re.sub(r'(^([a-z])|(?<=[-/])s?([a-z]))',

             lambda match: match.group(1).upper(), string))

# Test/String - This is a test string

answered Dec 27 '18 at 20:30

DeepSpace

37.1k44169

If you don't want to go with a messy splitting-joining logic, go with a regex:

import re



string = 'test/string - this is a test string'



print(re.sub(r'(^([a-z])|(?<=[-/])s?([a-z]))',

             lambda match: match.group(1).upper(), string))

# Test/String - This is a test string

answered Dec 27 '18 at 20:30

DeepSpace

37.1k44169

answered Dec 27 '18 at 20:30

DeepSpace

37.1k44169

answered Dec 27 '18 at 20:30

DeepSpace

37.1k44169

answered Dec 27 '18 at 20:30

DeepSpace

37.1k44169

add a comment |

Using double split

import re

' - '.join([i.strip().capitalize() for i in re.split(' - ','/'.join([i.capitalize() for i in re.split('/',test_phrase)]))])

answered Dec 27 '18 at 20:31

mad_

3,60211020

add a comment |

Using double split

import re

' - '.join([i.strip().capitalize() for i in re.split(' - ','/'.join([i.capitalize() for i in re.split('/',test_phrase)]))])

answered Dec 27 '18 at 20:31

mad_

3,60211020

add a comment |

Using double split

import re

' - '.join([i.strip().capitalize() for i in re.split(' - ','/'.join([i.capitalize() for i in re.split('/',test_phrase)]))])

answered Dec 27 '18 at 20:31

mad_

3,60211020

Using double split

import re

' - '.join([i.strip().capitalize() for i in re.split(' - ','/'.join([i.capitalize() for i in re.split('/',test_phrase)]))])

answered Dec 27 '18 at 20:31

mad_

3,60211020

answered Dec 27 '18 at 20:31

mad_

3,60211020

answered Dec 27 '18 at 20:31

mad_

3,60211020

answered Dec 27 '18 at 20:31

mad_

3,60211020

add a comment |

draft saved

draft discarded

Thanks for contributing an answer to Stack Overflow!

Please be sure to answer the question. Provide details and share your research!

But avoid …

Asking for help, clarification, or responding to other answers.

Making statements based on opinion; back them up with references or personal experience.

To learn more, see our tips on writing great answers.

Some of your past answers have not been well-received, and you're in danger of being blocked from answering.

Please pay close attention to the following guidance:

Please be sure to answer the question. Provide details and share your research!

But avoid …

Asking for help, clarification, or responding to other answers.

Making statements based on opinion; back them up with references or personal experience.

To learn more, see our tips on writing great answers.

draft saved

draft discarded

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

Post as a guest

Name

Required, but never shown

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

Name

Required, but never shown

Name

Required, but never shown

This page is only for reference, If you need detailed information, please check here

搜尋此網誌

Bdtjtk