Regular Expressions 101

Pro

\ba Unicode word boundary

Character Class[0-9]{1,4}

{1,4}matches between 1 and 4 characters from the set below:

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

Non-Capturing Group(?:[.-]?[A-Za-z])?

?repeats the group contents below at most once:

Character Class[.-]?

?matches at most one character from the set below:

.the literal . (46₁₀ / 56₈ / 2E₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Character Class[A-Za-z]

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

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

Non-Capturing Group(?:,?\s[0-9]{1,4}(?:[.-]?[A-Za-z])?)*

*repeats the group contents below any number of times:

,?optionally matches the literal , (44₁₀ / 54₈ / 2C₁₆)

\sa Unicode whitespace character

Character Class[0-9]{1,4}

{1,4}matches between 1 and 4 characters from the set below:

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

Non-Capturing Group(?:[.-]?[A-Za-z])?

?repeats the group contents below at most once:

Character Class[.-]?

?matches at most one character from the set below:

.the literal . (46₁₀ / 56₈ / 2E₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Character Class[A-Za-z]

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

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

Global pattern flags

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

u modifier: unicode. Makes \w, \W, \b, \B, \d, \D, \s, and \S use Unicode semantics (redundant in Python 3)

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

No unit tests · Add a test to get started

25 tokens

\b[0-9]{1,4}(?:[.-]?[A-Za-z])?(?:,?\s[0-9]{1,4}(?:[.-]?[A-Za-z])?)*

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