Regular Expressions 101

Pro

\w+any word character, repeated at least once

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

Group 1([^][]+|(?R))

1st Alternative[^][]+

Negated Character Class[^][]+

+matches at least one character outside the set below:

]the literal ] (93₁₀ / 135₈ / 5D₁₆)

[the literal [ (91₁₀ / 133₈ / 5B₁₆)

2nd Alternative(?R)

(?R)recurses into the entire pattern

Non-Capturing Group(?:,\s*((?1)))+

+repeats the group contents below at least once:

,the literal , (44₁₀ / 54₈ / 2C₁₆)

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

Group 2((?1))

(?1)calls group 1 as a subroutine

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

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.

25 tokens

\w+\[([^][]+|(?R))(?:,\s*((?1)))+\]

Tuple[Union[file.File, directory.Directory, Tuple[file.File, directory.Directory]], Tuple[file.File, directory.Directory]]
Tuple[int,int]

Tuple[Union[file.File, directory.Directory, Tuple[file.File, directory.Directory]], Tuple[file.File, directory.Directory]]
Tuple[int,int]