Regular Expressions 101

Group float(?P<float>^\d+\.\d+\s)

^start of line

\d+a digit, repeated at least once

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

\sany whitespace character

Group beforeTEST(?P<beforeTEST>(?:(?!(?P>float)).)*)

Non-Capturing Group(?:(?!(?P>float)).)*

*repeats the group contents below any number of times:

Negative Lookahead(?!(?P>float))

(?P>float)calls group float as a subroutine

.any character

\ban ASCII word boundary

TESTthe literal text TEST (case sensitive)

\ban ASCII word boundary

(?P>beforeTEST)calls group beforeTEST as a subroutine

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

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

(?P<float>^\d+\.\d+\s)(?P<beforeTEST>(?:(?!(?P>float)).)*)\bTEST\b(?P>beforeTEST)

New

asdasdasda
2.1 adasdasdasdasdwvwetwevtwtv
wetvwetv TEST wqrqwvrqw
qwvrqwvqwr
2.2 whergtvwe
wetvwetvwetveatw
evtwet
2.3 eyrnenytunrunert
vqevrerwv TEST aevtawtvwetv
wetvwetv TEST wqrqwvrqw