[Bugs] #240 NORM: [portfolio] named variables cause errors in "+="

[SugarLabs Bugs]

#240: [portfolio] named variables cause errors in "+="
-------------------------+--------------------------------------------------
 Reporter:  sprinkmeier  |       Owner:  walter     
     Type:  defect       |      Status:  new        
 Priority:  normal       |   Milestone:             
Component:  Turtleart    |     Version:  unspecified
 Keywords:  portfolio    |  
-------------------------+--------------------------------------------------
 Doing the block=equivalent of
 {{{
 foo = foo + 100
 }}}

 fails with the error below:
 {{{

 TypeError: 'str' object is not callable
 space, 32<flags 0 of type GdkModifierType>
 ---------------------------------------------------------------------------
 TypeError                                 Traceback (most recent call
 last)

 /home/olpc/Activities/TurtleArtPortfolio.activity/tawindow.py in
 keypress_cb(area=<gtk.EventBox object at 0x9f86cd4 (GtkEventBox at
 0xa3e4340)>, event=<GdkEvent at 0xa3e4390>, tw=<tawindow.taWindow instance
 at 0x9f76bcc>)
     442     if tw.firstkey: newnum =
 selblock.check(keyname,tw.defdict[selblock.name])
     443     else: newnum = oldnum+keyname
 --> 444     setlabel(tw.selected_block, selblock.check(newnum,oldnum))
         global setlabel = <function setlabel at 0xb609317c>
         tw.selected_block = <tasprites.taSprite instance at 0xa16cfcc>
         selblock.check = ''
         newnum = 'None '
         oldnum = 'None'
     445     tw.firstkey = False
     446     return True
 }}}

 the equivalent 'code' works with box1 and box2

-- 
Ticket URL: <http://dev.sugarlabs.org/ticket/240>
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