Hi Noli On Thu, Jan 14, 2010 at 2:04 AM, Noli Sicad <[email protected]> wrote: > [...] > > Did anybody manage to use qgis in python? > > from PyQt4.QtCore import * > from qgis.core import * >
Do you mean to run python scripts from command line that would use functionality of QGIS libraries? It's possible to do it and many times very useful. I've written several such scripts for various uses, e.g. map rendering or aligning points with street numbers to network of streets. It's also possible to create interactive applications using QGIS gui library where you can use map canvas with just few lines of code (see [1]). > I think it would be useful if some of the authors of those python > plugins can demonstrate how to use the functions / commands in python > script in QGIS python console or just in python CLI. We can mix and > match command for geoprocessing to unless the power of QGIS. I know > what can R GEO can do. As Carson have already written, there are barely any plugins which would have good support of interaction from QGIS python console (although I admit it would be very useful). It depends how well is the plugin code split into 'core' and 'gui' part: having core code bounded tightly with the gui would make it hard to use plugin's functionality from console. Second problem is that probably not many plugin developers are willing to keep some code compatibility among different versions to ensure that potential users don't have to change the code with new versions. Anyway, just a small example how the plugins can be accessed (PostGIS Manager plugin is used and prints DB server info): >>> pm = qgis.utils.plugins['postgis_manager'] >>> pm.dlg.db.get_info() u'PostgreSQL 8.3.8 on x86_64-pc-linux-gnu, compiled by GCC gcc-4.4.real (Ubuntu 4.4.1-3ubuntu3) 4.4.1' Of course the plugin must be started first. Btw. this works for QGIS >= 1.4. For QGIS <= 1.3 the first command would be: >>> pm = plugins['postgis_manager'] [1] http://blog.qgis.org/node/59 Regards Martin _______________________________________________ Qgis-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/qgis-user
