regex101: Python Substitution Workspace

^start of line

Group 1([A-Z0-9](?:[A-Z0-9 ]*[A-Z0-9])?\b)

Character Class[A-Z0-9]

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

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Non-Capturing Group(?:[A-Z0-9 ]*[A-Z0-9])?

?repeats the group contents below at most once:

Character Class[A-Z0-9 ]*

*matches any number of characters from the set below:

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

0-9one character from 0 (48₁₀) to 9 (57₁₀)

the literal (32₁₀ / 40₈ / 20₁₆)

Character Class[A-Z0-9]

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

0-9one character from 0 (48₁₀) to 9 (57₁₀)

\ba Unicode word boundary

Non-Capturing Group(?: $(a\.k\.a\.[^()]+(?:\sa\.k\.a\.[^()]+)*)$)?

?repeats the group contents below at most once:

the literal (32₁₀ / 40₈ / 20₁₆)

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Group 2(a\.k\.a\.[^()]+(?:\sa\.k\.a\.[^()]+)*)

athe literal a (97₁₀ / 141₈ / 61₁₆) (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

kthe literal k (107₁₀ / 153₈ / 6B₁₆) (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

athe literal a (97₁₀ / 141₈ / 61₁₆) (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Negated Character Class[^()]+

+matches at least one character outside the set below:

(the literal ( (40₁₀ / 50₈ / 28₁₆)

)the literal ) (41₁₀ / 51₈ / 29₁₆)

Non-Capturing Group(?:\sa\.k\.a\.[^()]+)*

*repeats the group contents below any number of times:

\sa Unicode whitespace character

athe literal a (97₁₀ / 141₈ / 61₁₆) (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

kthe literal k (107₁₀ / 153₈ / 6B₁₆) (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

athe literal a (97₁₀ / 141₈ / 61₁₆) (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Negated Character Class[^()]+

+matches at least one character outside the set below:

(the literal ( (40₁₀ / 50₈ / 28₁₆)

)the literal ) (41₁₀ / 51₈ / 29₁₆)

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

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

Search reference

Regular Expression

^([A-Z0-9](?:[A-Z0-9 ]*[A-Z0-9])?\b)(?: \((a\.k\.a\.[^()]+(?:\sa\.k\.a\.[^()]+)*)\))?

Unit Tests

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