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Regex expression to find keywords in a string along with following characters

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.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;

0

I have a bunch of known keywords, like 'cat', 'dog', 'rat'.

I have a string that can be something like this:

'rat;dog,cat - browncatdog(black)ratratcatdog-whitecat:grey'

I need to find all the keywords plus any characters that are immediately following them (not including delimiters like semicolon and comma as well as the next keyword).

So the result from the string above should be this list:

'rat', 'dog', 'cat - brown', 'cat', 'dog(black)', 'rat', 'rat', 'cat', 'dog-white', 'cat:grey'

I've tried a few ways but end up getting items that contain multiple keywords, or missing some keywords.

python regex

share|improve this question

edited Mar 26 at 13:38

ZygD

4,4691111 gold badges3030 silver badges5454 bronze badges

asked Mar 25 at 15:24

catdogratcatdograt

1

migrated from superuser.com Mar 25 at 21:28

This question came from our site for computer enthusiasts and power users.

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  It would be helpful if you could edit your question to include the expected results, what you have tried so far (something more specific than "a few ways") and how it fails to meet expectations
  
  – cybernetic.nomad
  Mar 25 at 16:50
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  is it always and only rat, cat and dog for the 'main' keywords?
  
  – Tacratis
  Mar 25 at 21:31
  

  
  
  
  

add a comment | 

0

I have a bunch of known keywords, like 'cat', 'dog', 'rat'.

I have a string that can be something like this:

'rat;dog,cat - browncatdog(black)ratratcatdog-whitecat:grey'

I need to find all the keywords plus any characters that are immediately following them (not including delimiters like semicolon and comma as well as the next keyword).

So the result from the string above should be this list:

'rat', 'dog', 'cat - brown', 'cat', 'dog(black)', 'rat', 'rat', 'cat', 'dog-white', 'cat:grey'

I've tried a few ways but end up getting items that contain multiple keywords, or missing some keywords.

python regex

share|improve this question

edited Mar 26 at 13:38

ZygD

4,4691111 gold badges3030 silver badges5454 bronze badges

asked Mar 25 at 15:24

catdogratcatdograt

1

migrated from superuser.com Mar 25 at 21:28

This question came from our site for computer enthusiasts and power users.

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  It would be helpful if you could edit your question to include the expected results, what you have tried so far (something more specific than "a few ways") and how it fails to meet expectations
  
  – cybernetic.nomad
  Mar 25 at 16:50
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  is it always and only rat, cat and dog for the 'main' keywords?
  
  – Tacratis
  Mar 25 at 21:31
  

  
  
  
  

add a comment | 

I have a bunch of known keywords, like 'cat', 'dog', 'rat'.

I have a string that can be something like this:

'rat;dog,cat - browncatdog(black)ratratcatdog-whitecat:grey'

I need to find all the keywords plus any characters that are immediately following them (not including delimiters like semicolon and comma as well as the next keyword).

So the result from the string above should be this list:

'rat', 'dog', 'cat - brown', 'cat', 'dog(black)', 'rat', 'rat', 'cat', 'dog-white', 'cat:grey'

I've tried a few ways but end up getting items that contain multiple keywords, or missing some keywords.

python regex

share|improve this question

edited Mar 26 at 13:38

ZygD

4,4691111 gold badges3030 silver badges5454 bronze badges

asked Mar 25 at 15:24

catdogratcatdograt

1

'rat;dog,cat - browncatdog(black)ratratcatdog-whitecat:grey'

'rat', 'dog', 'cat - brown', 'cat', 'dog(black)', 'rat', 'rat', 'cat', 'dog-white', 'cat:grey'

share|improve this question

edited Mar 26 at 13:38

ZygD

4,4691111 gold badges3030 silver badges5454 bronze badges

asked Mar 25 at 15:24

catdogratcatdograt

1

share|improve this question

edited Mar 26 at 13:38

ZygD

4,4691111 gold badges3030 silver badges5454 bronze badges

asked Mar 25 at 15:24

catdogratcatdograt

1

edited Mar 26 at 13:38

ZygD

4,4691111 gold badges3030 silver badges5454 bronze badges

edited Mar 26 at 13:38

ZygD

4,4691111 gold badges3030 silver badges5454 bronze badges

asked Mar 25 at 15:24

catdogratcatdograt

1

asked Mar 25 at 15:24

catdogratcatdograt

1

2 Answers
2

active

oldest

votes

0

Try this

>>> [(f[0], f[1][0]) for f in re.findall(r'(rat|dog|cat)(.w+)', 'rat;dog,cat - browncatdog(black)ratratcatdog-whitecat:grey') if re.match(r'(cat|dog|rat|[,;])', f[1]) is None]
[('cat', ':')]

Regards,

share|improve this answer

edited Mar 25 at 22:22

answered Mar 25 at 22:03

geckosgeckos

1,59811 gold badge1313 silver badges2626 bronze badges

add a comment | 

0

I think it is not possible using pure regex.
A trick would be to add a deliminator before all keywords and to split afterwards.

>>> s = "rat;dog,cat - browncatdog(black)ratratcatdog-whitecat:grey"
>>> re.split(r"[;,]+", re.sub(r"(cat|dog|rat)",r",1",s))
['', 'rat', 'dog', 'cat - brown', 'cat', 'dog(black)', 'rat', 'rat', 'cat', 'dog-white', 'cat:grey']

share|improve this answer

answered Mar 25 at 22:43

DSchmidtDSchmidt

59644 silver badges1111 bronze badges

add a comment | 

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0

Try this

>>> [(f[0], f[1][0]) for f in re.findall(r'(rat|dog|cat)(.w+)', 'rat;dog,cat - browncatdog(black)ratratcatdog-whitecat:grey') if re.match(r'(cat|dog|rat|[,;])', f[1]) is None]
[('cat', ':')]

Regards,

share|improve this answer

edited Mar 25 at 22:22

answered Mar 25 at 22:03

geckosgeckos

1,59811 gold badge1313 silver badges2626 bronze badges

add a comment | 

0

Try this

>>> [(f[0], f[1][0]) for f in re.findall(r'(rat|dog|cat)(.w+)', 'rat;dog,cat - browncatdog(black)ratratcatdog-whitecat:grey') if re.match(r'(cat|dog|rat|[,;])', f[1]) is None]
[('cat', ':')]

Regards,

share|improve this answer

edited Mar 25 at 22:22

answered Mar 25 at 22:03

geckosgeckos

1,59811 gold badge1313 silver badges2626 bronze badges

add a comment | 

Try this

>>> [(f[0], f[1][0]) for f in re.findall(r'(rat|dog|cat)(.w+)', 'rat;dog,cat - browncatdog(black)ratratcatdog-whitecat:grey') if re.match(r'(cat|dog|rat|[,;])', f[1]) is None]
[('cat', ':')]

Regards,

share|improve this answer

edited Mar 25 at 22:22

answered Mar 25 at 22:03

geckosgeckos

1,59811 gold badge1313 silver badges2626 bronze badges

>>> [(f[0], f[1][0]) for f in re.findall(r'(rat|dog|cat)(.w+)', 'rat;dog,cat - browncatdog(black)ratratcatdog-whitecat:grey') if re.match(r'(cat|dog|rat|[,;])', f[1]) is None]
[('cat', ':')]

share|improve this answer

edited Mar 25 at 22:22

answered Mar 25 at 22:03

geckosgeckos

1,59811 gold badge1313 silver badges2626 bronze badges

answered Mar 25 at 22:03

geckosgeckos

1,59811 gold badge1313 silver badges2626 bronze badges

answered Mar 25 at 22:03

geckosgeckos

1,59811 gold badge1313 silver badges2626 bronze badges

0

I think it is not possible using pure regex.
A trick would be to add a deliminator before all keywords and to split afterwards.

>>> s = "rat;dog,cat - browncatdog(black)ratratcatdog-whitecat:grey"
>>> re.split(r"[;,]+", re.sub(r"(cat|dog|rat)",r",1",s))
['', 'rat', 'dog', 'cat - brown', 'cat', 'dog(black)', 'rat', 'rat', 'cat', 'dog-white', 'cat:grey']

share|improve this answer

answered Mar 25 at 22:43

DSchmidtDSchmidt

59644 silver badges1111 bronze badges

add a comment | 

0

I think it is not possible using pure regex.
A trick would be to add a deliminator before all keywords and to split afterwards.

>>> s = "rat;dog,cat - browncatdog(black)ratratcatdog-whitecat:grey"
>>> re.split(r"[;,]+", re.sub(r"(cat|dog|rat)",r",1",s))
['', 'rat', 'dog', 'cat - brown', 'cat', 'dog(black)', 'rat', 'rat', 'cat', 'dog-white', 'cat:grey']

share|improve this answer

answered Mar 25 at 22:43

DSchmidtDSchmidt

59644 silver badges1111 bronze badges

add a comment | 

I think it is not possible using pure regex.
A trick would be to add a deliminator before all keywords and to split afterwards.

>>> s = "rat;dog,cat - browncatdog(black)ratratcatdog-whitecat:grey"
>>> re.split(r"[;,]+", re.sub(r"(cat|dog|rat)",r",1",s))
['', 'rat', 'dog', 'cat - brown', 'cat', 'dog(black)', 'rat', 'rat', 'cat', 'dog-white', 'cat:grey']

share|improve this answer

answered Mar 25 at 22:43

DSchmidtDSchmidt

59644 silver badges1111 bronze badges

>>> s = "rat;dog,cat - browncatdog(black)ratratcatdog-whitecat:grey"
>>> re.split(r"[;,]+", re.sub(r"(cat|dog|rat)",r",1",s))
['', 'rat', 'dog', 'cat - brown', 'cat', 'dog(black)', 'rat', 'rat', 'cat', 'dog-white', 'cat:grey']

share|improve this answer

answered Mar 25 at 22:43

DSchmidtDSchmidt

59644 silver badges1111 bronze badges

answered Mar 25 at 22:43

DSchmidtDSchmidt

59644 silver badges1111 bronze badges

answered Mar 25 at 22:43

DSchmidtDSchmidt

59644 silver badges1111 bronze badges