Add python3 repo

twrp-extras.xml

@@ -22,7 +22,9 @@
 
 <!-- Include external Magisk repo for repack binaries -->
     <project path="external/magisk-prebuilt" name="external_magisk-prebuilt" remote="TeamWin" revision="android-9.0" />
-	
+
+    <project path="external/python3" name="android_external_python3" remote="TeamWin" revision="android-9.0"/>
+
 <!-- Include TeamWin android_system_update_engine to build a good update_engine_sideload -->
     <project path="system/update_engine" name="android_system_update_engine" remote="TeamWin" revision="android-9.0" />
 </manifest>