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diff --git a/lib/python2.7/lib-tk/tkMessageBox.py b/lib/python2.7/lib-tk/tkMessageBox.py
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+++ b/lib/python2.7/lib-tk/tkMessageBox.py
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+# tk common message boxes
+#
+# this module provides an interface to the native message boxes
+# available in Tk 4.2 and newer.
+#
+# written by Fredrik Lundh, May 1997
+#
+
+#
+# options (all have default values):
+#
+# - default: which button to make default (one of the reply codes)
+#
+# - icon: which icon to display (see below)
+#
+# - message: the message to display
+#
+# - parent: which window to place the dialog on top of
+#
+# - title: dialog title
+#
+# - type: dialog type; that is, which buttons to display (see below)
+#
+
+from tkCommonDialog import Dialog
+
+#
+# constants
+
+# icons
+ERROR = "error"
+INFO = "info"
+QUESTION = "question"
+WARNING = "warning"
+
+# types
+ABORTRETRYIGNORE = "abortretryignore"
+OK = "ok"
+OKCANCEL = "okcancel"
+RETRYCANCEL = "retrycancel"
+YESNO = "yesno"
+YESNOCANCEL = "yesnocancel"
+
+# replies
+ABORT = "abort"
+RETRY = "retry"
+IGNORE = "ignore"
+OK = "ok"
+CANCEL = "cancel"
+YES = "yes"
+NO = "no"
+
+
+#
+# message dialog class
+
+class Message(Dialog):
+    "A message box"
+
+    command  = "tk_messageBox"
+
+
+#
+# convenience stuff
+
+# Rename _icon and _type options to allow overriding them in options
+def _show(title=None, message=None, _icon=None, _type=None, **options):
+    if _icon and "icon" not in options:    options["icon"] = _icon
+    if _type and "type" not in options:    options["type"] = _type
+    if title:   options["title"] = title
+    if message: options["message"] = message
+    res = Message(**options).show()
+    # In some Tcl installations, yes/no is converted into a boolean.
+    if isinstance(res, bool):
+        if res:
+            return YES
+        return NO
+    # In others we get a Tcl_Obj.
+    return str(res)
+
+def showinfo(title=None, message=None, **options):
+    "Show an info message"
+    return _show(title, message, INFO, OK, **options)
+
+def showwarning(title=None, message=None, **options):
+    "Show a warning message"
+    return _show(title, message, WARNING, OK, **options)
+
+def showerror(title=None, message=None, **options):
+    "Show an error message"
+    return _show(title, message, ERROR, OK, **options)
+
+def askquestion(title=None, message=None, **options):
+    "Ask a question"
+    return _show(title, message, QUESTION, YESNO, **options)
+
+def askokcancel(title=None, message=None, **options):
+    "Ask if operation should proceed; return true if the answer is ok"
+    s = _show(title, message, QUESTION, OKCANCEL, **options)
+    return s == OK
+
+def askyesno(title=None, message=None, **options):
+    "Ask a question; return true if the answer is yes"
+    s = _show(title, message, QUESTION, YESNO, **options)
+    return s == YES
+
+def askyesnocancel(title=None, message=None, **options):
+    "Ask a question; return true if the answer is yes, None if cancelled."
+    s = _show(title, message, QUESTION, YESNOCANCEL, **options)
+    # s might be a Tcl index object, so convert it to a string
+    s = str(s)
+    if s == CANCEL:
+        return None
+    return s == YES
+
+def askretrycancel(title=None, message=None, **options):
+    "Ask if operation should be retried; return true if the answer is yes"
+    s = _show(title, message, WARNING, RETRYCANCEL, **options)
+    return s == RETRY
+
+
+# --------------------------------------------------------------------
+# test stuff
+
+if __name__ == "__main__":
+
+    print "info", showinfo("Spam", "Egg Information")
+    print "warning", showwarning("Spam", "Egg Warning")
+    print "error", showerror("Spam", "Egg Alert")
+    print "question", askquestion("Spam", "Question?")
+    print "proceed", askokcancel("Spam", "Proceed?")
+    print "yes/no", askyesno("Spam", "Got it?")
+    print "yes/no/cancel", askyesnocancel("Spam", "Want it?")
+    print "try again", askretrycancel("Spam", "Try again?")