Inital commit

main.py

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+from ulauncher.api.client.Extension import Extension
+from ulauncher.api.client.EventListener import EventListener
+from ulauncher.api.shared.event import KeywordQueryEvent, ItemEnterEvent
+from ulauncher.api.shared.item.ExtensionResultItem import ExtensionResultItem
+from ulauncher.api.shared.action.RenderResultListAction import RenderResultListAction
+from ulauncher.api.shared.action.HideWindowAction import HideWindowAction
+
+
+class DemoExtension(Extension):
+
+    def __init__(self):
+        super(DemoExtension, self).__init__()
+        self.subscribe(KeywordQueryEvent, KeywordQueryEventListener())
+
+
+class KeywordQueryEventListener(EventListener):
+
+    def on_event(self, event, extension):
+        items = []
+        for i in range(5):
+            items.append(ExtensionResultItem(icon='images/icon.png',
+                                             name='Item %s' % i,
+                                             description='Item description %s' % i,
+                                             on_enter=HideWindowAction()))
+
+        return RenderResultListAction(items)
+
+if __name__ == '__main__':
+    DemoExtension().run()

manifest.json

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+{
+  "required_api_version": "^2.0.0",
+  "name": "Unicode extension",
+  "description": "Extension Description",
+  "developer_name": "John Doe",
+  "icon": "images/bookmark.svg",
+  "options": {
+    "query_debounce": 0.1
+  },
+  "preferences": [
+    {
+      "id": "demo_kw",
+      "type": "keyword",
+      "name": "Demo",
+      "description": "Demo extension",
+      "default_value": "dm"
+    }
+  ]
+}

versions.json

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+[
+  {"required_api_version": "^2.3.1", "commit": "master"}
+]