from pypdf import PdfReader, PdfWriter
extrusion_layer = QgsVectorLayerSimple3DRenderer() extrusion_layer.setExtrusionHeight(10) # Height in map units settings.setLayers([layer]) pyqgis programmer 39s guide 3 pdf work
The guide is structured to allow you to "work through" practical examples as you learn. Major sections include: Go to product viewer dialog for this item. Use QgsFontUtils to fallback to a safe font like Arial
| Issue | PyQGIS Solution | |-------|----------------| | PDF text renders as boxes | Install missing fonts on the server. Use QgsFontUtils to fallback to a safe font like Arial. | | Raster layers are blurry | Increase PdfExportSettings.dpi to 600 or use rasterizeWholeImage=False (be careful with complex symbology). | | Layout exporter crashes headless | You must instantiate a QgsApplication and set setAttribute(Qt.AA_EnableHighDpiScaling) before any layout operations. | | Memory leak when exporting 1000+ PDFs | Use QgsLayoutExporter inside a loop but call QgsProject.instance().clear() and QgsApplication.processEvents() after each batch. | | Map labels shift between PDF and GUI | Disable label placement engine; use labelSettings.setPlacement(QgsLabelingEngine.SimplePlacement) in the layout map item. | | | Memory leak when exporting 1000+ PDFs
: Specific chapters dedicated to converting existing code from Python 2 (QGIS 2.x) to Python 3 (QGIS 3.x). Key Features
If you absolutely need a PDF, consider generating it from the HTML source using httrack + wkhtmltopdf or purchasing a third‑party PyQGIS 3 book.