regex101: Python Match Workspace

Explanation

Pro

Negative Lookbehind(?<!\w)

\wa Unicode word character

1st AlternativeRef\.\:

Refthe literal text Ref (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\:the literal : (58₁₀ / 72₈ / 3A₁₆)

2nd AlternativeReference

Referencethe literal text Reference (case sensitive)

3rd Alternativetramite

tramitethe literal text tramite (case sensitive)

4th AlternativeExpediente

Expedientethe literal text Expediente (case sensitive)

5th AlternativeExpediente\ No

Expedientethe literal text Expediente (case sensitive)

\ the literal (32₁₀ / 40₈ / 20₁₆)

Nothe literal text No (case sensitive)

6th AlternativeExpedien\ N\°

Expedienthe literal text Expedien (case sensitive)

\ the literal (32₁₀ / 40₈ / 20₁₆)

Nthe literal N (78₁₀ / 116₈ / 4E₁₆) (case sensitive)

\°the literal ° (176₁₀ / 260₈ / B0₁₆)

7th AlternativeExp\.No

Expthe literal text Exp (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Nothe literal text No (case sensitive)

8th AlternativeExpedien

Expedienthe literal text Expedien (case sensitive)

\W*any character that is not a Unicode word character, repeated any number of times

Group 2([A-Z]*\d+(?:-+[A-Z]*\d+)*)

Character Class[A-Z]*

*matches any number of characters from the set below:

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

\d+a Unicode decimal digit, repeated at least once

Non-Capturing Group(?:-+[A-Z]*\d+)*

*repeats the group contents below any number of times:

-+the literal - (45₁₀ / 55₈ / 2D₁₆) , repeated at least once

Character Class[A-Z]*

*matches any number of characters from the set below:

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

\d+a Unicode decimal digit, repeated at least once

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Quick Reference

25 tokens

Regular Expression

(?<!\w)(Ref\.\:|Reference|tramite|Expediente|Expediente\ No|Expedien\ N\°|Exp\.No|Expedien)\W*([A-Z]*\d+(?:-+[A-Z]*\d+)*)

New

some text before Expedien: 1-21-212-16-26 some random text
Reference RE9833 of all sentences.
abc
123
456
something blah blah Ref.: 
tramite  1234567
Ref.:
some junk Expedien N° 18-00777 # some new content
some text Expedien N°18-0022995 # some garbled content

Substitution

some text before Expedien: 1-21-212-16-26 some random text
Reference RE9833 of all sentences.
abc
123
456
something blah blah Ref.: 
tramite  1234567
Ref.:
some junk Expedien N° 18-00777 # some new content
some text Expedien N°18-0022995 # some garbled content