regex101: Python Match Workspace

Explanation

Pro

Negative Lookbehind(?<!\S)

\Sany character that is not Unicode whitespace

Negative Lookbehind(?<![\d,])

Character Class[\d,]

\da Unicode decimal digit

,the literal , (44₁₀ / 54₈ / 2C₁₆)

Non-Capturing Group(?:(?!(?:1[2-9]\d\d|20[01]\d|2020))\d{4,}[\u00BC-\u00BE\u2150-\u215E]?|\d{1,3}(?:,\d{3})+)

1st Alternative(?!(?:1[2-9]\d\d|20[01]\d|2020))\d{4,}[\u00BC-\u00BE\u2150-\u215E]?

Negative Lookahead(?!(?:1[2-9]\d\d|20[01]\d|2020))

Non-Capturing Group(?:1[2-9]\d\d|20[01]\d|2020)

1st Alternative1[2-9]\d\d

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

Character Class[2-9]

2-9one character from 2 (50₁₀) to 9 (57₁₀)

\da Unicode decimal digit

2nd Alternative20[01]\d

20the literal text 20

Character Class[01]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

\da Unicode decimal digit

3rd Alternative2020

2020the literal text 2020

\d{4,}a Unicode decimal digit, repeated at least 4 times

Character Class[\u00BC-\u00BE\u2150-\u215E]?

?matches at most one character from the set below:

\u00BC-\u00BEone character from ¼ (188₁₀) to ¾ (190₁₀)

\u2150-\u215Eone character from ⅐ (8528₁₀) to ⅞ (8542₁₀)

2nd Alternative\d{1,3}(?:,\d{3})+

\d{1,3}a Unicode decimal digit, repeated between 1 and 3 times

Non-Capturing Group(?:,\d{3})+

+repeats the group contents below at least once:

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\d{3}a Unicode decimal digit, repeated exactly 3 times

Negative Lookahead(?![\d,])

Character Class[\d,]

\da Unicode decimal digit

,the literal , (44₁₀ / 54₈ / 2C₁₆)

Character Class[\u00BC-\u00BE\u2150-\u215E]?

?matches at most one character from the set below:

\u00BC-\u00BEone character from ¼ (188₁₀) to ¾ (190₁₀)

\u2150-\u215Eone character from ⅐ (8528₁₀) to ⅞ (8542₁₀)

Negative Lookahead(?!x)

xthe literal x (120₁₀ / 170₈ / 78₁₆) (case sensitive)

Negative Lookahead(?!/)

/the literal / (47₁₀ / 57₈ / 2F₁₆)

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

(?<!\S)(?<![\d,])(?:(?!(?:1[2-9]\d\d|20[01]\d|2020))\d{4,}[\u00BC-\u00BE\u2150-\u215E]?|\d{1,3}(?:,\d{3})+)(?![\d,])[\u00BC-\u00BE\u2150-\u215E]?(?!x)(?!/)

Unit Tests

There are no unit tests.