python-3.6.zip added from Github

README.cosmo contains the necessary links.

third_party/python/Lib/tkinter/dialog.py

@@ -0,0 +1,46 @@
+# dialog.py -- Tkinter interface to the tk_dialog script.
+
+from tkinter import *
+from tkinter import _cnfmerge
+
+DIALOG_ICON = 'questhead'
+
+
+class Dialog(Widget):
+    def __init__(self, master=None, cnf={}, **kw):
+        cnf = _cnfmerge((cnf, kw))
+        self.widgetName = '__dialog__'
+        Widget._setup(self, master, cnf)
+        self.num = self.tk.getint(
+                self.tk.call(
+                      'tk_dialog', self._w,
+                      cnf['title'], cnf['text'],
+                      cnf['bitmap'], cnf['default'],
+                      *cnf['strings']))
+        try: Widget.destroy(self)
+        except TclError: pass
+    def destroy(self): pass
+
+def _test():
+    d = Dialog(None, {'title': 'File Modified',
+                      'text':
+                      'File "Python.h" has been modified'
+                      ' since the last time it was saved.'
+                      ' Do you want to save it before'
+                      ' exiting the application.',
+                      'bitmap': DIALOG_ICON,
+                      'default': 0,
+                      'strings': ('Save File',
+                                  'Discard Changes',
+                                  'Return to Editor')})
+    print(d.num)
+
+
+if __name__ == '__main__':
+    t = Button(None, {'text': 'Test',
+                      'command': _test,
+                      Pack: {}})
+    q = Button(None, {'text': 'Quit',
+                      'command': t.quit,
+                      Pack: {}})
+    t.mainloop()