Regular Expressions 101

All the errors detected are listed below, from left to right, as they appear in the pattern.

(?(_star) Python conditional target must be defined earlier

) Python conditional target must be defined earlier

(?(_star2) Python conditional target must be defined earlier

) Python conditional target must be defined earlier

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

this(?(_star)\s*|)(?P<_star>[\w\s]{,10}?)?(?(_star)\s*|)(?(_star2)\s*|)(?P<_star2>[\w\s]{10,})?(?(_star2)\s*|)ok$

New

this     is great hyes   jljladsf  dsaf ljaldsjlfjoiuajdsflj ok


this is (\w+\s+)?(?(1)\s|\w)

this * 


*10
*1,2
*2
*2,10
*,10

(?(_star)\s*|)(?P<_star>[\w\s]{10}?)?(?(_star)\s*|)