# GroupDocs.Watermark for Python via .NET — Complete Documentation > Native Python library that adds, searches, and removes text and image watermarks across PDF, Word, Excel, PowerPoint, Visio, ema......"code-example-search-by-regex">}} {{< tab "search_by_regex.py" >}} ```python...TextSearchCriteria def search_by_regex(): with Watermarker("./document...