Initial checking of Tk-based Python IDE.

Features: text editor with syntax coloring and undo;
subclassed into interactive Python shell which adds history.

Tools/idle/HelpWindow.py

@@ -0,0 +1,65 @@
+import os
+import sys
+from Tkinter import *
+
+
+class HelpWindow:
+
+    helpfile = "help.txt"
+    helptitle = "Help Window"
+
+    def __init__(self, root=None):
+        if not root:
+            import Tkinter
+            root = Tkinter._default_root
+        if root:
+            self.top = top = Toplevel(root)
+        else:
+            self.top = top = root = Tk()
+
+        helpfile = self.helpfile
+        if not os.path.exists(helpfile):
+            base = os.path.basename(self.helpfile)
+            for dir in sys.path:
+                fullname = os.path.join(dir, base)
+                if os.path.exists(fullname):
+                    helpfile = fullname
+                    break
+        try:
+            f = open(helpfile)
+            data = f.read()
+            f.close()
+        except IOError, msg:
+            data = "Can't open the help file (%s)" % `helpfile`
+
+        top.protocol("WM_DELETE_WINDOW", self.close_command)
+        top.wm_title(self.helptitle)
+
+        self.close_button = Button(top, text="close",
+                                   command=self.close_command)
+        self.close_button.pack(side="bottom")
+
+        self.vbar = vbar = Scrollbar(top, name="vbar")
+        self.text = text = Text(top)
+
+        vbar["command"] = text.yview
+        text["yscrollcommand"] = vbar.set
+
+        vbar.pack(side="right", fill="y")
+        text.pack(side="left", fill="both", expand=1)
+
+        text.insert("1.0", data)
+
+        text.config(state="disabled")
+        text.see("1.0")
+
+    def close_command(self):
+        self.top.destroy()
+
+
+def main():
+    h = HelpWindow()
+    h.top.mainloop()
+
+if __name__ == "__main__":
+    main()