One of the characteristics of most free software projects is that their documentation is freely available and can be used for learning. QGIS is one of the best-documented projects, thanks to training material, a coding cookbook, and the automatic documentation of its Application Programming Interfaces (APIs).
In this chapter, we will focus on main resources that are available on the web to learn how to script QGIS and how to solve your scripting problems.
The main resource is a community content-driven cookbook that gives a general introduction to scripting QGIS. You can find this documentation at http://www.qgis.org/en/docs/index.html.
You have to choose the QGIS target version of your plugin and then choose the PyQGIS Developer Cookbook link. If you are interested in the latest QGIS APIs, you have to choose the testing version or directly go to http://docs.qgis.org/testing/en/docs/pyqgis_developer_cookbook/
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If you need...