• Python plugin API changes from 1.8 to 2.0
• SIPAPI upgrade
• QVariant removed
• QSettings return type
• Replace QString methods
• Replace QStringList with list
• Remove QVariant calls
• Replace QList methods with python list function
• Replace signals with new style signals and connections
• Vector layer API changes
• QgsFeatureRequest replaces select(), featureAtId()
• Getting/setting QgsFeature attributes simplified
• Plugin repository and metadata changes
• Making a plugin compatible with all QGIS versions
• Testing for QGIS version
• Testing for SIP api version (QGIS 2 uses SIP api v2)