#9261: RealIntervalField: enable option style='bracket'
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   Reporter:  zimmerma          |       Owner:  AlexGhitza
       Type:  enhancement       |      Status:  new       
   Priority:  minor             |   Milestone:  sage-4.5.2
  Component:  basic arithmetic  |    Keywords:            
     Author:                    |    Upstream:  N/A       
   Reviewer:                    |      Merged:            
Work_issues:                    |  
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Comment(by cwitty):

 I don't like the idea of putting the print style in the parent.  (I think
 the current sci_not is a design error that shouldn't be perpetuated.)

 One problem is that if you have objects like {{{RealIntervalField(42,
 style='brackets')(pi)}}} and {{{RealIntervalField(42)(pi)}}}, then
 arithmetic between them is slower than between objects with the same
 parent.  Also, there are several parts of Sage that create their own
 {{{RealIntervalField}}} parents and return elements to the user, so the
 option you suggest would not suffice to hide question-mark printing from
 the user.

 IMHO a global setting is a more sensible option; would that be all right,
 or do you really want the setting to be per-parent?

 If a global setting is acceptable, then we're in luck, because it already
 exists: :)
 {{{
 sage: a = RIF(pi)
 sage: a
 3.141592653589794?
 sage: sage.rings.real_mpfi.printing_style = 'brackets'
 sage: a
 [3.1415926535897931 .. 3.1415926535897936]
 }}}

 We could certainly document this global setting (I think it's entirely
 undocumented now), if that would help.

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9261#comment:2>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
and MATLAB

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