regex101: Python Match Workspace

^start of line

Group prod(?P<prod>\w+)

\w+a Unicode word character, repeated at least once

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group maj(?P<maj>\d)

\da Unicode decimal digit

.any Unicode character (except for line terminators)

Group min(?P<min>\d)

\da Unicode decimal digit

.any Unicode character (except for line terminators)

Group bug(?P<bug>\d)

\da Unicode decimal digit

Non-Capturing Group(?:-(?P<pre>alpha|beta|rc)(?:\.(?P<pre_n>\d))?(?:\.(?P<pre_x>\w+))?(?<!centos|redhat))?

?repeats the group contents below at most once:

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group pre(?P<pre>alpha|beta|rc)

1st Alternativealpha

alphathe literal text alpha (case sensitive)

2nd Alternativebeta

betathe literal text beta (case sensitive)

3rd Alternativerc

rcthe literal text rc (case sensitive)

Non-Capturing Group(?:\.(?P<pre_n>\d))?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group pre_n(?P<pre_n>\d)

\da Unicode decimal digit

Non-Capturing Group(?:\.(?P<pre_x>\w+))?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group pre_x(?P<pre_x>\w+)

\w+a Unicode word character, repeated at least once

Negative Lookbehind(?<!centos|redhat)

1st Alternativecentos

centosthe literal text centos (case sensitive)

2nd Alternativeredhat

redhatthe literal text redhat (case sensitive)

Non-Capturing Group(?:\.(?P<os>centos|redhat))?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group os(?P<os>centos|redhat)

1st Alternativecentos

centosthe literal text centos (case sensitive)

2nd Alternativeredhat

redhatthe literal text redhat (case sensitive)

Non-Capturing Group(?:\.(?P<plat>snb|ivb))?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group plat(?P<plat>snb|ivb)

1st Alternativesnb

snbthe literal text snb (case sensitive)

2nd Alternativeivb

ivbthe literal text ivb (case sensitive)

$end of line

Global pattern flags

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

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Search reference

Regular Expression

^(?P<prod>\w+)-(?P<maj>\d).(?P<min>\d).(?P<bug>\d)(?:-(?P<pre>alpha|beta|rc)(?:\.(?P<pre_n>\d))?(?:\.(?P<pre_x>\w+))?(?<!centos|redhat))?(?:\.(?P<os>centos|redhat))?(?:\.(?P<plat>snb|ivb))?$

New

foo-1.2.3
foo-2.3.4-alpha
foo-3.4.5-rc.2
foo-4.5.6-rc.2.extra
withos-5.6.7.centos
osandextra-7.8.9-rc.foo.redhat
os_and_plat-4.4.4-rc.1.foo.centos.ivb


issue-0.1.0-beta.redhat.snb

Regular Expressions 101

Regular Expression

Substitution