Regular Expressions 101

Pro

^start of string

Non-Capturing Group(?:[^,]*\,){7}

{7}repeats the group contents below exactly 7 times:

Negated Character Class[^,]*

*matches any number of characters outside the set below:

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\,the literal , (44₁₀ / 54₈ / 2C₁₆)

Character Class[\s]*

*matches any number of characters from the set below:

\sany whitespace character

Group SOURCE_PEER_IP(?P<SOURCE_PEER_IP>[\d\w\.:\-_;]+)

Character Class[\d\w\.:\-_;]+

+matches at least one character from the set below:

\da digit

\wany word character

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\-the literal - (45₁₀ / 55₈ / 2D₁₆)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

Global pattern flags

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

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25 tokens

^(?:[^,]*\,){7}[\s]*(?P<SOURCE_PEER_IP>[\d\w\.:\-_;]+),

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