[Bugs] #516 UNSP: Inequality yields traceback

[SugarLabs Bugs]

#516: Inequality yields traceback
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    Reporter:  sascha_silbe               |          Owner:  wadeb                      
        Type:  defect                     |         Status:  new                        
    Priority:  Unspecified by Maintainer  |      Milestone:  Unspecified by Release Team
   Component:  Calculate                  |        Version:  Git as of bugdate          
    Severity:  Unspecified                |       Keywords:                             
Distribution:  Unspecified                |   Status_field:  Unconfimed                 
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 Using inequality (!=, Boolean) will yield the following traceback:

 1236690580.130710 DEBUG Calculate: process(): parsing u'1!=0', label: u''
 1236690580.138846 DEBUG root: Parsing preprocessed equation: u'1!=0'
 Traceback (most recent call last):
   File "/home/sugar/sugar-
 jhbuild/install/share/sugar/activities/Calculate.activity/layout.py", line
 70, in <lambda>
     [3, 3, 3, _('Enter'), self.col_gray1, lambda w:
 self._parent.process()],
   File "/home/sugar/sugar-
 jhbuild/install/share/sugar/activities/Calculate.activity/calculate.py",
 line 437, in process
     res = self.parser.evaluate(tree)
   File "/home/sugar/sugar-
 jhbuild/install/share/sugar/activities/Calculate.activity/astparser.py",
 line 586, in evaluate
     ret = self._process_node(eqn.body, state)
   File "/home/sugar/sugar-
 jhbuild/install/share/sugar/activities/Calculate.activity/astparser.py",
 line 401, in _process_node
     func = self.CMPOP_MAP[type(node.ops[0])]
 KeyError: <class '_ast.NotEq'>

 When using Return (keyboard), there's no visual indication at all (i.e.
 it's as if Return had not been pressed). When using the Enter button, it's
 similar, though focus will change normally.

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Ticket URL: <http://dev.sugarlabs.org/ticket/516>
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