regex101: Python Match Workspace

Explanation

Pro

Group 1([£€$])?

?repeats the group contents below at most once:

Character Class[£€$]

£the literal £ (163₁₀ / 243₈ / A3₁₆)

€the literal € (8364₁₀ / 20254₈ / 20AC₁₆)

$the literal $ (36₁₀ / 44₈ / 24₁₆)

Positive Lookahead(?=(\d{1,3}(?:,\d{3})*(?:\.\d+)?(?![\d.,])(?:\s*(?:[tTbB]n|m|(?:[tT]r|[bBmM])illion)\b)?)(\s*(?:[pP](?:ence)?|[cC](?:ents?)?|€|[eE]uros?|[dD]ollars?|[pP]ounds?)\b)?)

Group 2(\d{1,3}(?:,\d{3})*(?:\.\d+)?(?![\d.,])(?:\s*(?:[tTbB]n|m|(?:[tT]r|[bBmM])illion)\b)?)

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

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

*repeats the group contents below any number of times:

,the literal , (44₁₀ / 54₈ / 2C₁₆)

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

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

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

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

Negative Lookahead(?![\d.,])

Character Class[\d.,]

\da Unicode decimal digit

.the literal . (46₁₀ / 56₈ / 2E₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

Non-Capturing Group(?:\s*(?:[tTbB]n|m|(?:[tT]r|[bBmM])illion)\b)?

?repeats the group contents below at most once:

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

Non-Capturing Group(?:[tTbB]n|m|(?:[tT]r|[bBmM])illion)

1st Alternative[tTbB]n

Character Class[tTbB]

tthe literal t (116₁₀ / 164₈ / 74₁₆) (case sensitive)

Tthe literal T (84₁₀ / 124₈ / 54₁₆) (case sensitive)

bthe literal b (98₁₀ / 142₈ / 62₁₆) (case sensitive)

Bthe literal B (66₁₀ / 102₈ / 42₁₆) (case sensitive)

nthe literal n (110₁₀ / 156₈ / 6E₁₆) (case sensitive)

2nd Alternativem

mthe literal m (109₁₀ / 155₈ / 6D₁₆) (case sensitive)

3rd Alternative(?:[tT]r|[bBmM])illion

Non-Capturing Group(?:[tT]r|[bBmM])

1st Alternative[tT]r

Character Class[tT]

tthe literal t (116₁₀ / 164₈ / 74₁₆) (case sensitive)

Tthe literal T (84₁₀ / 124₈ / 54₁₆) (case sensitive)

rthe literal r (114₁₀ / 162₈ / 72₁₆) (case sensitive)

2nd Alternative[bBmM]

Character Class[bBmM]

bthe literal b (98₁₀ / 142₈ / 62₁₆) (case sensitive)

Bthe literal B (66₁₀ / 102₈ / 42₁₆) (case sensitive)

mthe literal m (109₁₀ / 155₈ / 6D₁₆) (case sensitive)

Mthe literal M (77₁₀ / 115₈ / 4D₁₆) (case sensitive)

illionthe literal text illion (case sensitive)

\ba Unicode word boundary

?repeats the group contents below at most once:

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

1st Alternative[pP](?:ence)?

Character Class[pP]

pthe literal p (112₁₀ / 160₈ / 70₁₆) (case sensitive)

Pthe literal P (80₁₀ / 120₈ / 50₁₆) (case sensitive)

Non-Capturing Group(?:ence)?

?repeats the group contents below at most once:

encethe literal text ence (case sensitive)

2nd Alternative[cC](?:ents?)?

Character Class[cC]

Non-Capturing Group(?:ents?)?

3rd Alternative€

4th Alternative[eE]uros?

5th Alternative[dD]ollars?

6th Alternative[pP]ounds?

\ba Unicode word boundary

Condition(?(1)\2(?!\3)|(?<![£€$])\2\3)

Global pattern flags

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

Quick Reference

25 tokens

Regular Expression

([£€$])?(?=(\d{1,3}(?:,\d{3})*(?:\.\d+)?(?![\d.,])(?:\s*(?:[tTbB]n|m|(?:[tT]r|[bBmM])illion)\b)?)(\s*(?:[pP](?:ence)?|[cC](?:ents?)?|€|[eE]uros?|[dD]ollars?|[pP]ounds?)\b)?)(?(1)\2(?!\3)|(?<![£€$])\2\3)

New

$1 dollar ✘
1 ✘
$1 tn dollars ✘
$1,00000.000,000 ✘
1,000.00 ✘

$1 ✓
1 pence ✓
1 cent ✓
1 euro ✓
1 dollar ✓
1 pound ✓
$1 tn ✓
$1 trillion ✓
1 trillion dollars ✓
$1,000,000,000,000 ✓
$1.000 ✓
$1,000,000,000,000.000000 ✓

This sentence is worth 1 dollar, at least. More likely $2 or $3.

Substitution

$1 dollar ✘
1 ✘
$1 tn dollars ✘
$1,00000.000,000 ✘
1,000.00 ✘

$1 ✓
1 pence ✓
1 cent ✓
1 euro ✓
1 dollar ✓
1 pound ✓
$1 tn ✓
$1 trillion ✓
1 trillion dollars ✓
$1,000,000,000,000 ✓
$1.000 ✓
$1,000,000,000,000.000000 ✓

This sentence is worth 1 dollar, at least. More likely $2 or $3.