Regular Expressions 101

Pro

<spanthe literal text <span (case sensitive)

\ba Unicode word boundary

Negated Character Class[^>]*

*matches any number of characters outside the set below:

>the literal > (62₁₀ / 76₈ / 3E₁₆)

Comment: Открывающий span с любыми атребутами

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

Comment: Пробелы

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

\-?optionally matches the literal - (45₁₀ / 55₈ / 2D₁₆)

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

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

?repeats the group contents below at most once:

Character Class[\.\,]

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\,the literal , (44₁₀ / 54₈ / 2C₁₆)

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

Comment: Число

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

Comment: Пробелы

<the literal < (60₁₀ / 74₈ / 3C₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

span>the literal text span> (case sensitive)

Comment: Закрывающий span

Global pattern flags

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

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

s modifier: single line. Allows a dot to match line terminators

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25 tokens

Regular Expression

<span\b[^>]*>(?# Открывающий span с любыми атребутами
	)\s*(?# Пробелы
	)(\-?\d+(?:[\.\,]\d+)?)(?# Число
	)\s*(?# Пробелы
)<\/span>(?# Закрывающий span)

Unit Tests

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