#9683: pretty_print clobbers _ (history)
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Reporter: mguaypaq | Owner: was
Type: defect | Status: new
Priority: major | Milestone: sage-5.6
Component: user interface | Resolution:
Keywords: pretty_print, history | Work issues:
Report Upstream: N/A | Reviewers:
Authors: | Merged in:
Dependencies: | Stopgaps:
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Comment (by iandrus):
In the ipython `displayhook` it checks to see if underscore was set
explicitly and if so, it stops tracking. We are setting it explicitly in
`pretty_print`. Maybe if we just stop doing this it will work. Also we
probably need to fix `pretty_print_default` to set it to the ipython
`displayhook` instead of the default one.
{{{
def check_for_underscore(self):
"""Check if the user has set the '_' variable by hand."""
# If something injected a '_' variable in __builtin__, delete
# ipython's automatic one so we don't clobber that. gettext() in
# particular uses _, so we need to stay away from it.
if '_' in __builtin__.__dict__:
try:
del self.shell.user_ns['_']
except KeyError:
pass
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9683#comment:1>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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