Status: Accepted
Owner: asmeurer
Labels: Type-Defect Priority-High Milestone-Release0.7.0 Printing
New issue 2354 by asmeurer: isympy -o doesn't parse bad arguments correctly
http://code.google.com/p/sympy/issues/detail?id=2354
$./bin/isympy -o notarealordering
IPython console for SymPy 0.6.7-git (Python 2.7.1) (ground types: gmpy)
These commands were executed:
from __future__ import division
from sympy import *
x, y, z, t = symbols('x y z t')
k, m, n = symbols('k m n', integer=True)
f, g, h = symbols('f g h', cls=Function)
Documentation can be found at http://www.sympy.org
In [1]: x**2 + 1
Out[1]:
---------------------------------------------------------------------------
ValueError Traceback (most recent call last)
/Users/aaronmeurer/Documents/python/sympy/sympy-scratch/<ipython console>
in <module>()
/sw/lib/python2.7/site-packages/IPython/Prompts.pyc in __call__(self, arg)
550
551 # and now call a possibly user-defined print mechanism
--> 552 manipulated_val = self.display(arg)
553
554 # user display hooks can change the variable to be
stored in
/sw/lib/python2.7/site-packages/IPython/Prompts.pyc in _display(self, arg)
576 return IPython.generics.result_display(arg)
577 except TryNext:
--> 578 return self.shell.hooks.result_display(arg)
579
580 # Assign the default display method:
/sw/lib/python2.7/site-packages/IPython/hooks.pyc in __call__(self, *args,
**kw)
139 #print "prio",prio,"cmd",cmd #dbg
140 try:
--> 141 ret = cmd(*args, **kw)
142 return ret
143 except ipapi.TryNext, exc:
/Users/aaronmeurer/Documents/python/sympy/sympy-scratch/sympy/interactive/printing.pyc
in
result_display(self, arg)
32 """
33 if self.rc.pprint:
---> 34 out = stringify_func(arg)
35
36 if '\n' in out:
/Users/aaronmeurer/Documents/python/sympy/sympy-scratch/sympy/printing/pretty/pretty.pyc
in
pretty(expr, **settings)
864
865 try:
--> 866 return pp.doprint(expr)
867 finally:
868 pretty_use_unicode(uflag)
/Users/aaronmeurer/Documents/python/sympy/sympy-scratch/sympy/printing/pretty/pretty.pyc
in
doprint(self, expr)
36
37 def doprint(self, expr):
---> 38 return self._print(expr).render(**self._settings)
39
40 # empty op so _print(stringPict) returns the same
/Users/aaronmeurer/Documents/python/sympy/sympy-scratch/sympy/printing/printer.pyc
in
_print(self, expr, *args)
246 printmethod = '_print_' + cls.__name__
247 if hasattr(self, printmethod):
--> 248 return getattr(self, printmethod)(expr, *args)
249
250 # Unknown object, fall back to the emptyPrinter.
/Users/aaronmeurer/Documents/python/sympy/sympy-scratch/sympy/printing/pretty/pretty.pyc
in
_print_Add(self, expr, order)
497
498 def _print_Add(self, expr, order=None):
--> 499 terms = self._as_ordered_terms(expr, order=order)
500 pforms, indices = [], []
501
/Users/aaronmeurer/Documents/python/sympy/sympy-scratch/sympy/printing/printer.pyc
in
_as_ordered_terms(self, expr, order)
259 if order is None:
260 return sorted(Add.make_args(expr),
Basic._compare_pretty)
261 else:
--> 262 return expr.as_ordered_terms(order=order)
263
/Users/aaronmeurer/Documents/python/sympy/sympy-scratch/sympy/core/expr.pyc
in as_ordered_terms(self, order, data)
254 from sympy.utilities import any
255
--> 256 key, reverse = self._parse_order(order)
257 terms, gens = self.as_terms()
258
/Users/aaronmeurer/Documents/python/sympy/sympy-scratch/sympy/core/expr.pyc
in _parse_order(cls, order)
212 order = order[4:]
213
--> 214 monom_key = monomial_key(order)
215
216 def key(term):
/Users/aaronmeurer/Documents/python/sympy/sympy-scratch/sympy/polys/monomialtools.pyc
in
monomial_key(order)
127 return _monomial_key[order]
128 except KeyError:
--> 129 raise ValueError("supported monomial orderings
are 'lex', 'grlex' and 'grevlex', got %r" % order)
130 elif hasattr(order, '__call__'):
131 return order
ValueError: supported monomial orderings are 'lex', 'grlex' and 'grevlex',
got 'notarealordering'
isympy should give an error straightway about this. There should be one
unified list of allowable ordering somewhere that all the various things
can check against, to make it easier if we decide to add any new orderings.
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