Checking in IDLE 0.2.

Much has changed -- too much, in fact, to write down.
The big news is that there's a standard way to write IDLE extensions;
see extend.txt.  Some sample extensions have been provided, and
some existing code has been converted to extensions.  Probably the
biggest new user feature is a new search dialog with more options,
search and replace, and even search in files (grep).

This is exactly as downloaded from my laptop after returning
from the holidays -- it hasn't even been tested on Unix yet.

Tools/idle/ScriptBinding.py

@@ -0,0 +1,38 @@
+import tkMessageBox
+import os
+import imp
+import sys
+
+class ScriptBinding:
+
+    def __init__(self, editwin):
+        self.editwin = editwin
+        text = editwin.text
+        text.bind("<<run-module>>", self.run_module)
+        text.bind("<<run-script>>", self.run_script)
+        text.bind("<<new-shell>>", self.new_shell)
+
+    def run_module(self, event=None):
+        filename = self.editwin.io.filename
+        if not filename:
+            tkMessageBox.showerror("No file name",
+                                   "This window has no file name",
+                                   master=self.editwin.text)
+            return
+        modname, ext = os.path.splitext(os.path.basename(filename))
+        try:
+            mod = sys.modules[modname]
+        except KeyError:
+            mod = imp.new_module(modname)
+            sys.modules[modname] = mod
+        source = self.editwin.text.get("1.0", "end")
+        exec source in mod.__dict__
+
+    def run_script(self, event=None):
+        pass
+
+    def new_shell(self, event=None):
+        import PyShell
+        # XXX Not enough: each shell takes over stdin/stdout/stderr...
+        pyshell = PyShell.PyShell(self.editwin.flist)
+        pyshell.begin()