Regular Expressions 101

\ba Unicode word boundary

Negative Lookbehind(?<!\bdef )

\ba Unicode word boundary

def the literal text def (case sensitive)

Group 1([a-zA-Z0-9.]+?)

Character Class[a-zA-Z0-9.]+?

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

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

\b(?<!\bdef )([a-zA-Z0-9.]+?)\(

def foo(): bar()