Regular Expressions 101

^start of line

Gradethe literal text Grade (case sensitive)

\s*a Unicode whitespace character, repeated any number of times

=the literal = (61₁₀ / 75₈ / 3D₁₆)

\s*a Unicode whitespace character, repeated any number of times

Group grade(?P<grade>.+)

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

Group students(?P<students>[\s\S]+?)

Character Class[\s\S]+?

+?matches at least one character from the set below:

\sa Unicode whitespace character

\Sany character that is not Unicode whitespace

Positive Lookahead(?=^Grade|\Z)

1st Alternative^Grade

^start of line

Gradethe literal text Grade (case sensitive)

2nd Alternative\Z

\Zend of string, or before its final line terminator

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

x modifier: extended. Ignores unescaped whitespace and comments outside character classes

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

^
Grade\s*=\s*(?P<grade>.+)
(?P<students>[\s\S]+?)
(?=^Grade|\Z)

Test String
New

School = Riverdale High
Grade = 1
Student number, Name
0, Phoebe
1, Rachel

Student number, Score
0, 3
1, 7

Grade = 2
Student number, Name
0, Angela
1, Tristan
2, Aurora

Student number, Score
0, 6
1, 3
2, 9

Regular Expression

Test StringNew

Test String
New