regex101: Python Match Workspace

Pro

\ba Unicode word boundary

Non-Capturing Group(?:\w+\.)*

*repeats the group contents below any number of times:

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

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\w*a Unicode word character, repeated any number of times

Exceptionthe literal text Exception (case sensitive)

Non-Capturing Group(?:\.\w+)*

*repeats the group contents below any number of times:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

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

\ba Unicode word boundary

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

25 tokens

Regular Expression

\b(?:\w+\.)*\w*Exception(?:\.\w+)*\b

New

08-01-2021: There is a System.InvalidCalculationException - System reboots
09-01-2021: SuperSystem recognised a System.IO.WritingException ask user what to do next
10-01-2021: Oh no, not again an InternalException.NullReference.NonCritical.User we should fix it!

Substitution

08-01-2021: There is a System.InvalidCalculationException - System reboots
09-01-2021: SuperSystem recognised a System.IO.WritingException ask user what to do next
10-01-2021: Oh no, not again an InternalException.NullReference.NonCritical.User we should fix it!