regex101: Python Match Workspace

Group 1((?:[01]?[0-9]?[0-9]|2[0-4][0-9]|25[0-5])(?:\.(?:[01]?[0-9]?[0-9]|2[0-4][0-9]|25[0-5])){3})

Non-Capturing Group(?:[01]?[0-9]?[0-9]|2[0-4][0-9]|25[0-5])

1st Alternative[01]?[0-9]?[0-9]

Character Class[01]?

?matches at most one character from the set below:

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

Character Class[0-9]?

?matches at most one character from the set below:

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

Character Class[0-9]

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

2nd Alternative2[0-4][0-9]

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

Character Class[0-4]

0-4one character from 0 (48₁₀) to 4 (52₁₀)

Character Class[0-9]

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

3rd Alternative25[0-5]

25the literal text 25

Character Class[0-5]

0-5one character from 0 (48₁₀) to 5 (53₁₀)

Non-Capturing Group(?:\.(?:[01]?[0-9]?[0-9]|2[0-4][0-9]|25[0-5])){3}

{3}repeats the group contents below exactly 3 times:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Non-Capturing Group(?:[01]?[0-9]?[0-9]|2[0-4][0-9]|25[0-5])

1st Alternative[01]?[0-9]?[0-9]

Character Class[01]?

?matches at most one character from the set below:

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

Character Class[0-9]?

?matches at most one character from the set below:

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

Character Class[0-9]

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

2nd Alternative2[0-4][0-9]

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

Character Class[0-4]

0-4one character from 0 (48₁₀) to 4 (52₁₀)

Character Class[0-9]

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

3rd Alternative25[0-5]

25the literal text 25

Character Class[0-5]

0-5one character from 0 (48₁₀) to 5 (53₁₀)

Negative Lookahead(?!\S)

\Sany character that is not Unicode whitespace

.+?any Unicode character (except for line terminators), repeated at least once

Negative Lookbehind(?<!\S)

\Sany character that is not Unicode whitespace

Group 2((?:[01]?[0-9]?[0-9]|2[0-4][0-9]|25[0-5])(?:\.(?:[01]?[0-9]?[0-9]|2[0-4][0-9]|25[0-5])){3})

Non-Capturing Group(?:[01]?[0-9]?[0-9]|2[0-4][0-9]|25[0-5])

Non-Capturing Group(?:\.(?:[01]?[0-9]?[0-9]|2[0-4][0-9]|25[0-5])){3}

Global pattern flags

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

Search reference

Regular Expression

((?:[01]?[0-9]?[0-9]|2[0-4][0-9]|25[0-5])(?:\.(?:[01]?[0-9]?[0-9]|2[0-4][0-9]|25[0-5])){3})(?!\S).+?(?<!\S)((?:[01]?[0-9]?[0-9]|2[0-4][0-9]|25[0-5])(?:\.(?:[01]?[0-9]?[0-9]|2[0-4][0-9]|25[0-5])){3})

Unit Tests

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