regex101: Python Match Workspace

\ba Unicode word boundary

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

\da Unicode decimal digit

Character Class[,.]

,the literal , (44₁₀ / 54₈ / 2C₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

Negative Lookbehind(?<!\d-)

\da Unicode decimal digit

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group 1((?:\d+/)?\d+(?:[,.]\d+)*)

Non-Capturing Group(?:\d+/)?

?repeats the group contents below at most once:

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

/the literal / (47₁₀ / 57₈ / 2F₁₆)

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

Non-Capturing Group(?:[,.]\d+)*

*repeats the group contents below any number of times:

Character Class[,.]

,the literal , (44₁₀ / 54₈ / 2C₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

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

\ba Unicode word boundary

Group 2(\s*(\w*)/)?

?repeats the group contents below at most once:

\s*a Unicode whitespace character, repeated any number of times

Group 3(\w*)

\w*a Unicode word character, repeated any number of times

/the literal / (47₁₀ / 57₈ / 2F₁₆)

\s*a Unicode whitespace character, repeated any number of times

Group 4((?(2)\w+|\w+\s+per\s+\w+))

Condition(?(2)\w+|\w+\s+per\s+\w+)

Uses the first branch if group 2 matched

If the condition is true, match this branch:\w+

\w+a Unicode word character, repeated at least once

Otherwise, match this branch:\w+\s+per\s+\w+

\w+a Unicode word character, repeated at least once

\s+a Unicode whitespace character, repeated at least once

perthe literal text per (case sensitive)

\s+a Unicode whitespace character, repeated at least once

\w+a Unicode word character, repeated at least once

Positive Lookahead(?=\s*(?:[,)]|$))

\s*a Unicode whitespace character, repeated any number of times

Non-Capturing Group(?:[,)]|$)

1st Alternative[,)]

Character Class[,)]

,the literal , (44₁₀ / 54₈ / 2C₁₆)

)the literal ) (41₁₀ / 51₈ / 29₁₆)

2nd Alternative$

$end of line

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

\b(?<!\d[,.])(?<!\d-)((?:\d+/)?\d+(?:[,.]\d+)*)\b(\s*(\w*)/)?\s*((?(2)\w+|\w+\s+per\s+\w+))(?=\s*(?:[,)]|$))

Unit Tests

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