Regular Expressions 101

Group LongDate(?P<LongDate>(?P<Day>\d+)[\s ]+(?P<Month>January|February|March|April|May|June|July|August|September|October|November|December)[\s ]+(?P<Year>\d{4}))

Group Day(?P<Day>\d+)

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

Character Class[\s ]+

+matches at least one character from the set below:

\sa Unicode whitespace character

the literal (160₁₀ / 240₈ / A0₁₆)

the literal (8201₁₀ / 20011₈ / 2009₁₆)

1st AlternativeJanuary

Januarythe literal text January (case insensitive)

2nd AlternativeFebruary

Februarythe literal text February (case insensitive)

3rd AlternativeMarch

Marchthe literal text March (case insensitive)

4th AlternativeApril

Aprilthe literal text April (case insensitive)

5th AlternativeMay

Maythe literal text May (case insensitive)

6th AlternativeJune

Junethe literal text June (case insensitive)

7th AlternativeJuly

Julythe literal text July (case insensitive)

8th AlternativeAugust

Augustthe literal text August (case insensitive)

9th AlternativeSeptember

Septemberthe literal text September (case insensitive)

10th AlternativeOctober

Octoberthe literal text October (case insensitive)

11th AlternativeNovember

Novemberthe literal text November (case insensitive)

12th AlternativeDecember

Decemberthe literal text December (case insensitive)

Character Class[\s ]+

+matches at least one character from the set below:

\sa Unicode whitespace character

the literal (160₁₀ / 240₈ / A0₁₆)

the literal (8201₁₀ / 20011₈ / 2009₁₆)

Group Year(?P<Year>\d{4})

\d{4}a Unicode decimal digit, repeated exactly 4 times

Global pattern flags

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

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)

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

(?P<LongDate>(?P<Day>\d+)[\s  ]+(?P<Month>January|February|March|April|May|June|July|August|September|October|November|December)[\s  ]+(?P<Year>\d{4}))

Test String
New

of 19 September 2006 in

Regular Expression

Test StringNew

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Test String
New

Substitution
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