regex101: Python Match Workspace

Pro

^start of line

Negative Lookahead(?!%)

%the literal % (37₁₀ / 45₈ / 25₁₆)

Non-Capturing Group(?:.*\\document(?:class|style).*)

.*any Unicode character (except for line terminators), repeated any number of times

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

documentthe literal text document (case sensitive)

Non-Capturing Group(?:class|style)

1st Alternativeclass

classthe literal text class (case sensitive)

2nd Alternativestyle

stylethe literal text style (case sensitive)

.*any Unicode character (except for line terminators), repeated any number of times

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

^(?!%)(?:.*\\document(?:class|style).*)

New

% To use with LaTeX, use \documentstyle[psfig,...]{...}
To use with LaTeX, use \documentstyle[psfig,...]{...}
To use with LaTeX, use \documentclass[psfig,...]{...}
% To use with LaTeX, use \documentclass[psfig,...]{...}

Extraction

% To use with LaTeX, use \documentstyle[psfig,...]{...}
To use with LaTeX, use \documentstyle[psfig,...]{...}
To use with LaTeX, use \documentclass[psfig,...]{...}
% To use with LaTeX, use \documentclass[psfig,...]{...}