[node-devel] a problem occured when switch the ovirt-node setup Page

[Bohai (ricky)]

Hi ALL,

When I switch between the ovirt-node setup Pages, the follow error ouccrred.
About detail info, please see the follow trace.

I try to fix it like the follow code. It seems ok now.
But I don't know whether the fix is proper.
(For some reason, my network can't use ssh connect. 
I will push it to "http://gerrit.ovirt.org/" a little later)

diff --git a/src/ovirt/node/setup/__main__.py b/src/ovirt/node/setup/__main__.py
index 59eff4f..68973a9 100644
--- a/src/ovirt/node/setup/__main__.py
+++ b/src/ovirt/node/setup/__main__.py
@@ -27,5 +27,8 @@ from ovirt.node import app, setup


 if __name__ == '__main__':
+    from urwid import set_encoding
+    set_encoding('utf8')
+
     app = app.Application(setup)
     app.run()

Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/ovirt/node/app.py", line 303, in run
    self.ui.run()
  File "/usr/lib/python2.7/site-packages/ovirt/node/ui/urwid_builder.py", line 473, in run
    self.__loop.run()
  File "/usr/lib64/python2.7/site-packages/urwid/main_loop.py", line 271, in run
    self.screen.run_wrapper(self._run)
  File "/usr/lib64/python2.7/site-packages/urwid/raw_display.py", line 241, in run_wrapper
    return fn()
  File "/usr/lib64/python2.7/site-packages/urwid/main_loop.py", line 336, in _run
    self.event_loop.run()
  File "/usr/lib64/python2.7/site-packages/urwid/main_loop.py", line 707, in run
    self._loop()
  File "/usr/lib64/python2.7/site-packages/urwid/main_loop.py", line 777, in _loop
    self._entering_idle()
  File "/usr/lib64/python2.7/site-packages/urwid/main_loop.py", line 696, in _entering_idle
    callback()
  File "/usr/lib64/python2.7/site-packages/urwid/main_loop.py", line 548, in entering_idle
    self.draw_screen()
  File "/usr/lib64/python2.7/site-packages/urwid/main_loop.py", line 562, in draw_screen
    canvas = self._topmost_widget.render(self.screen_size, focus=True)
  File "/usr/lib64/python2.7/site-packages/urwid/widget.py", line 140, in cached_render
    canv = fn(self, size, focus=focus)
  File "/usr/lib64/python2.7/site-packages/urwid/decoration.py", line 224, in render
    canv = self._original_widget.render(size, focus=focus)
  File "/usr/lib64/python2.7/site-packages/urwid/widget.py", line 140, in cached_render
    canv = fn(self, size, focus=focus)
  File "/usr/lib64/python2.7/site-packages/urwid/container.py", line 1057, in render
    focus and self.focus_part == 'body')
  File "/usr/lib64/python2.7/site-packages/urwid/widget.py", line 140, in cached_render
    canv = fn(self, size, focus=focus)
  File "/usr/lib64/python2.7/site-packages/urwid/container.py", line 1498, in render
    canv = w.render((maxcol, rows), focus=focus and item_focus)
  File "/usr/lib64/python2.7/site-packages/urwid/widget.py", line 140, in cached_render
    canv = fn(self, size, focus=focus)
  File "/usr/lib64/python2.7/site-packages/urwid/container.py", line 2054, in render
    focus = focus and self.focus_position == i)
  File "/usr/lib64/python2.7/site-packages/urwid/widget.py", line 140, in cached_render
    canv = fn(self, size, focus=focus)
  File "/usr/lib64/python2.7/site-packages/urwid/container.py", line 1057, in render
    focus and self.focus_part == 'body')
  File "/usr/lib64/python2.7/site-packages/urwid/widget.py", line 140, in cached_render
    canv = fn(self, size, focus=focus)
  File "/usr/lib64/python2.7/site-packages/urwid/decoration.py", line 563, in render
    canv = self._original_widget.render((maxcol,)+size[1:], focus)
  File "/usr/lib64/python2.7/site-packages/urwid/widget.py", line 140, in cached_render
    canv = fn(self, size, focus=focus)
  File "/usr/lib64/python2.7/site-packages/urwid/container.py", line 1498, in render
    canv = w.render((maxcol, rows), focus=focus and item_focus)
  File "/usr/lib64/python2.7/site-packages/urwid/widget.py", line 140, in cached_render
    canv = fn(self, size, focus=focus)
  File "/usr/lib64/python2.7/site-packages/urwid/widget.py", line 1750, in render
    canv = get_delegate(self).render(size, focus=focus)
  File "/usr/lib64/python2.7/site-packages/urwid/widget.py", line 140, in cached_render
    canv = fn(self, size, focus=focus)
  File "/usr/lib64/python2.7/site-packages/urwid/container.py", line 1498, in render
    canv = w.render((maxcol, rows), focus=focus and item_focus)
  File "/usr/lib64/python2.7/site-packages/urwid/widget.py", line 140, in cached_render
    canv = fn(self, size, focus=focus)
  File "/usr/lib64/python2.7/site-packages/urwid/decoration.py", line 563, in render
    canv = self._original_widget.render((maxcol,)+size[1:], focus)
  File "/usr/lib64/python2.7/site-packages/urwid/widget.py", line 140, in cached_render
    canv = fn(self, size, focus=focus)
  File "/usr/lib64/python2.7/site-packages/urwid/container.py", line 1057, in render
    focus and self.focus_part == 'body')
  File "/usr/lib64/python2.7/site-packages/urwid/widget.py", line 140, in cached_render
    canv = fn(self, size, focus=focus)
  File "/usr/lib64/python2.7/site-packages/urwid/decoration.py", line 224, in render
    canv = self._original_widget.render(size, focus=focus)
  File "/usr/lib64/python2.7/site-packages/urwid/widget.py", line 140, in cached_render
    canv = fn(self, size, focus=focus)
  File "/usr/lib64/python2.7/site-packages/urwid/container.py", line 1492, in render
    canv = w.render((maxcol,), focus=focus and item_focus)
  File "/usr/lib64/python2.7/site-packages/urwid/widget.py", line 140, in cached_render
    canv = fn(self, size, focus=focus)
  File "/usr/lib/python2.7/site-packages/ovirt/node/ui/widgets.py", line 262, in render
    rt = super(TableWidget, self).render(size, focus)
  File "/usr/lib64/python2.7/site-packages/urwid/widget.py", line 140, in cached_render
    canv = fn(self, size, focus=focus)
  File "/usr/lib64/python2.7/site-packages/urwid/widget.py", line 1750, in render
    canv = get_delegate(self).render(size, focus=focus)
  File "/usr/lib64/python2.7/site-packages/urwid/widget.py", line 140, in cached_render
    canv = fn(self, size, focus=focus)
  File "/usr/lib64/python2.7/site-packages/urwid/container.py", line 1492, in render
    canv = w.render((maxcol,), focus=focus and item_focus)
  File "/usr/lib64/python2.7/site-packages/urwid/widget.py", line 140, in cached_render
    canv = fn(self, size, focus=focus)
  File "/usr/lib64/python2.7/site-packages/urwid/container.py", line 1492, in render
    canv = w.render((maxcol,), focus=focus and item_focus)
  File "/usr/lib64/python2.7/site-packages/urwid/widget.py", line 140, in cached_render
    canv = fn(self, size, focus=focus)
  File "/usr/lib64/python2.7/site-packages/urwid/decoration.py", line 402, in render
    canv = self._original_widget.render((maxcol, self.height), focus)
  File "/usr/lib64/python2.7/site-packages/urwid/widget.py", line 140, in cached_render
    canv = fn(self, size, focus=focus)
  File "/usr/lib64/python2.7/site-packages/urwid/container.py", line 2054, in render
    focus = focus and self.focus_position == i)
  File "/usr/lib64/python2.7/site-packages/urwid/widget.py", line 140, in cached_render
    canv = fn(self, size, focus=focus)
  File "/usr/lib64/python2.7/site-packages/urwid/decoration.py", line 813, in render
    canv = self._original_widget.render((maxcol,), focus)
  File "/usr/lib64/python2.7/site-packages/urwid/widget.py", line 140, in cached_render
    canv = fn(self, size, focus=focus)
  File "/usr/lib64/python2.7/site-packages/urwid/decoration.py", line 563, in render
    canv = self._original_widget.render((maxcol,)+size[1:], focus)
  File "/usr/lib64/python2.7/site-packages/urwid/widget.py", line 140, in cached_render
    canv = fn(self, size, focus=focus)
  File "/usr/lib64/python2.7/site-packages/urwid/decoration.py", line 224, in render
    canv = self._original_widget.render(size, focus=focus)
  File "/usr/lib64/python2.7/site-packages/urwid/widget.py", line 140, in cached_render
    canv = fn(self, size, focus=focus)
  File "/usr/lib64/python2.7/site-packages/urwid/widget.py", line 1007, in render
    return apply_text_layout(text, attr, trans, maxcol)
  File "/usr/lib64/python2.7/site-packages/urwid/canvas.py", line 1290, in apply_text_layout
    text[s.offs:s.end])
  File "/usr/lib64/python2.7/site-packages/urwid/util.py", line 120, in apply_target_encoding
    s = s.encode( _target_encoding )
UnicodeEncodeError: 'ascii' codec can't encode character u'\u25b2' in position 0: ordinal not in range(128)
An error appeared in the UI: UnicodeEncodeError('ascii', u'\u25b2', 0, 1, 'ordinal not in range(128)')
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Best regards to you.
Ricky