regex101: Python Match Workspace

Pro

^start of line

Group 1(#|//)

1st Alternative#

#the literal # (35₁₀ / 43₈ / 23₁₆)

2nd Alternative//

//the literal text //

Non-Capturing Group(?:.+\n)+

+repeats the group contents below at least once:

.+any Unicode character (except for line terminators), repeated at least once

\na line-feed (newline) character (ASCII 10)

^start of line

\1the text saved by group 1

.+any Unicode character (except for line terminators), repeated at least once

\n?optionally matches a line-feed (newline) character (ASCII 10)

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

^(#|//)(?:.+\n)+^\1.+\n?

New

i want this
#____NOT_FOR_CUSTOMER_BEGIN________
not this
nor this
#________NOT_FOR_CUSTOMER_END____
and this
//____NOT_FOR_CUSTOMER_BEGIN__
not this again
nor this again
//__________NOT_FOR_CUSTOMER_END____
and this again

//---
dsdsd
# dsds

// dsdsd

Extraction

i want this
#____NOT_FOR_CUSTOMER_BEGIN________
not this
nor this
#________NOT_FOR_CUSTOMER_END____
and this
//____NOT_FOR_CUSTOMER_BEGIN__
not this again
nor this again
//__________NOT_FOR_CUSTOMER_END____
and this again

//---
dsdsd
# dsds

// dsdsd