regex101: Python Match Workspace

Pro

Non-Capturing Group(?:https?://|www\d{0,3}[.]|[a-z0-9.\-]+[.][a-z]{2,4}/)

1st Alternativehttps?://

httpthe literal text http (case insensitive)

s?optionally matches the literal s (115₁₀ / 163₈ / 73₁₆) (case insensitive)

://the literal text ://

2nd Alternativewww\d{0,3}[.]

wwwthe literal text www (case insensitive)

\d{0,3}a Unicode decimal digit, repeated between 0 and 3 times

Character Class[.]

.the literal . (46₁₀ / 56₈ / 2E₁₆)

3rd Alternative[a-z0-9.\-]+[.][a-z]{2,4}/

Character Class[a-z0-9.\-]+

+matches at least one character from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case insensitive)

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

.the literal . (46₁₀ / 56₈ / 2E₁₆)

\-the literal - (45₁₀ / 55₈ / 2D₁₆)

Character Class[.]

.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[a-z]{2,4}

{2,4}matches between 2 and 4 characters from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case insensitive)

/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group 1([^\s()<>]+|$([^\s()<>]+|(\([^\s()<>]+$))*\))

1st Alternative[^\s()<>]+

Negated Character Class[^\s()<>]+

+matches at least one character outside the set below:

\sa Unicode whitespace character

(the literal ( (40₁₀ / 50₈ / 28₁₆)

)the literal ) (41₁₀ / 51₈ / 29₁₆)

<the literal < (60₁₀ / 74₈ / 3C₁₆)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

2nd Alternative$([^\s()<>]+|(\([^\s()<>]+$))*\)

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Group 2([^\s()<>]+|($[^\s()<>]+$))*

*repeats the group contents below any number of times:

1st Alternative[^\s()<>]+

Negated Character Class[^\s()<>]+

+matches at least one character outside the set below:

\sa Unicode whitespace character

(the literal ( (40₁₀ / 50₈ / 28₁₆)

)the literal ) (41₁₀ / 51₈ / 29₁₆)

<the literal < (60₁₀ / 74₈ / 3C₁₆)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

2nd Alternative($[^\s()<>]+$)

Group 3($[^\s()<>]+$)

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Negated Character Class[^\s()<>]+

+matches at least one character outside the set below:

\sa Unicode whitespace character

(the literal ( (40₁₀ / 50₈ / 28₁₆)

)the literal ) (41₁₀ / 51₈ / 29₁₆)

<the literal < (60₁₀ / 74₈ / 3C₁₆)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

Negated Character Class[^\s()<>]*

*matches any number of characters outside the set below:

\sa Unicode whitespace character

(the literal ( (40₁₀ / 50₈ / 28₁₆)

)the literal ) (41₁₀ / 51₈ / 29₁₆)

<the literal < (60₁₀ / 74₈ / 3C₁₆)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

Negated Character Class[^\s`!()\[\]{};:\'".,<>?«»“”‘’]

\sa Unicode whitespace character

`the literal ` (96₁₀ / 140₈ / 60₁₆)

!the literal ! (33₁₀ / 41₈ / 21₁₆)

(the literal ( (40₁₀ / 50₈ / 28₁₆)

)the literal ) (41₁₀ / 51₈ / 29₁₆)

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

{the literal { (123₁₀ / 173₈ / 7B₁₆)

}the literal } (125₁₀ / 175₈ / 7D₁₆)

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\'the literal ' (39₁₀ / 47₈ / 27₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

<the literal < (60₁₀ / 74₈ / 3C₁₆)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

«the literal « (171₁₀ / 253₈ / AB₁₆)

»the literal » (187₁₀ / 273₈ / BB₁₆)

“the literal “ (8220₁₀ / 20034₈ / 201C₁₆)

”the literal ” (8221₁₀ / 20035₈ / 201D₁₆)

‘the literal ‘ (8216₁₀ / 20030₈ / 2018₁₆)

’the literal ’ (8217₁₀ / 20031₈ / 2019₁₆)

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

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

x modifier: extended. Ignores unescaped whitespace and comments outside character classes

25 tokens

Regular Expression

(?:https?://|www\d{0,3}[.]|[a-z0-9.\-]+[.][a-z]{2,4}/)
([^\s()<>]+|\(([^\s()<>]+|(\([^\s()<>]+\)))*\))[^\s()<>]*
[^\s`!()\[\]{};:\'".,<>?«»“”‘’]

Unit Tests

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