Added Python Sendablechooser Usage Docs.

Writerside/topics/pplib-Build-an-Auto.md

@@ -432,7 +432,7 @@ class RobotContainer:
 
 > **Note**
 >
-> This feature is only available in the Java version of PathPlannerLib
+> This feature is only available in the Java and Python versions of PathPlannerLib
 >
 {style="note"}
 
@@ -471,4 +471,23 @@ public class RobotContainer {
 }
 ```
 
-</snippet>
+```Python
+from pathplannerlib.auto import AutoBuilder
+
+class RobotContainer:
+
+    def __init__():
+
+        # Build an auto chooser. This will use Commands.none() as the default option.
+        self.autoChooser = AutoBuilder.buildAutoChooser()
+
+        # Another option that allows you to specify the default auto by its name
+        # self.autoChooser = AutoBuilder.buildAutoChooser("My Default Auto")
+
+        SmartDashboard.putData("Auto Chooser", self.autoChooser)
+
+    def getAutonomousCommand():
+        return self.autoChooser.getSelected()
+```
+
+</snippet>