GP-1035: Python interpreter code completion now works prior to executing

any python statements

Ghidra/Features/Python/src/main/java/ghidra/python/GhidraPythonInterpreter.java

@@ -332,7 +332,7 @@ public class GhidraPythonInterpreter extends InteractiveInterpreter {
 	 *
 	 * @param script The script whose class hierarchy is to be used for injection.
 	 */
-	private void injectScriptHierarchy(PythonScript script) {
+	void injectScriptHierarchy(PythonScript script) {
 
 		if (script == null) {
 			return;

Ghidra/Features/Python/src/main/java/ghidra/python/PythonPlugin.java

@@ -226,8 +226,14 @@ public class PythonPlugin extends ProgramPlugin
 
 		// Setup the PythonScript describing the state of the interactive prompt.
 		// This allows things like currentProgram and currentAddress to dynamically reflect
-		// what's happening in the listing.
+		// what's happening in the listing.  Injecting the script hierarchy early here allows
+		// code completion to work before commands are entered.
 		interactiveScript = new PythonScript();
+		interactiveScript.set(
+			new GhidraState(tool, tool.getProject(), getCurrentProgram(), getProgramLocation(),
+				getProgramSelection(), getProgramHighlight()),
+			interactiveTaskMonitor, new PrintWriter(getConsole().getStdOut()));
+		interpreter.injectScriptHierarchy(interactiveScript);
 		interactiveTaskMonitor = new PythonInteractiveTaskMonitor(console.getStdOut());
 
 		// Start the input thread that receives python commands to execute.