Status: New
Owner: ----
Labels: Type-Defect Priority-Medium
New issue 1593 by john.theman.connor: print_Basic, print_mathml, etc. are
broken
http://code.google.com/p/sympy/issues/detail?id=1593
This appears to be related to bugs 1311, 1310, and 1273.
For example:
from sympy import arg, I
from sympy.printing.mathml import mathml
mathml(arg(I))
gives the following trace:
/var/lib/python-support/python2.5/sympy/printing/mathml.pyc in mathml(expr)
132 """Returns the MathML representation of expr"""
133 s = MathMLPrinter()
--> 134 return s.doprint(sympify(expr))
135
136 def print_mathml(expr):
/var/lib/python-support/python2.5/sympy/printing/mathml.pyc in
doprint(self, e)
11
12 def doprint(self, e):
---> 13 return self._print(e).toprettyxml()
14
15 def mathml_tag(self, e):
/var/lib/python-support/python2.5/sympy/printing/printer.pyc in
_print(self, expr, *args)
93 for cls in type(expr).__mro__:
94 if hasattr(self, '_print_'+cls.__name__):
---> 95 res = getattr(self, '_print_'+cls.__name__)(expr,
*args)
96 break
97
/var/lib/python-support/python2.5/sympy/printing/mathml.pyc in
_print_AssocOp(self, e)
126 x.appendChild(x_1)
127 for arg in e.args:
--> 128 x.appendChild(self._print(arg))
129 return x
130
/var/lib/python-support/python2.5/sympy/printing/printer.pyc in
_print(self, expr, *args)
93 for cls in type(expr).__mro__:
94 if hasattr(self, '_print_'+cls.__name__):
---> 95 res = getattr(self, '_print_'+cls.__name__)(expr,
*args)
96 break
97
/var/lib/python-support/python2.5/sympy/printing/mathml.pyc in
_print_Basic(self, e)
117 def _print_Basic(self, e):
118 x = self.dom.createElement(self.mathml_tag(e))
--> 119 for arg in e:
120 x.appendChild(self._print(arg))
121 return x
TypeError: 'Pi' object
/var/lib/python-support/python2.5/sympy/printing/mathml.pyc in mathml(expr)
132 """Returns the MathML representation of expr"""
133 s = MathMLPrinter()
--> 134 return s.doprint(sympify(expr))
135
136 def print_mathml(expr):
/var/lib/python-support/python2.5/sympy/printing/mathml.pyc in
doprint(self, e)
11
12 def doprint(self, e):
---> 13 return self._print(e).toprettyxml()
14
15 def mathml_tag(self, e):
/var/lib/python-support/python2.5/sympy/printing/printer.pyc in
_print(self, expr, *args)
93 for cls in type(expr).__mro__:
94 if hasattr(self, '_print_'+cls.__name__):
---> 95 res = getattr(self, '_print_'+cls.__name__)(expr,
*args)
96 break
97
/var/lib/python-support/python2.5/sympy/printing/mathml.pyc in
_print_AssocOp(self, e)
126 x.appendChild(x_1)
127 for arg in e.args:
--> 128 x.appendChild(self._print(arg))
129 return x
130
/var/lib/python-support/python2.5/sympy/printing/printer.pyc in
_print(self, expr, *args)
93 for cls in type(expr).__mro__:
94 if hasattr(self, '_print_'+cls.__name__):
---> 95 res = getattr(self, '_print_'+cls.__name__)(expr,
*args)
96 break
97
/var/lib/python-support/python2.5/sympy/printing/mathml.pyc in
_print_Basic(self, e)
117 def _print_Basic(self, e):
118 x = self.dom.createElement(self.mathml_tag(e))
--> 119 for arg in e:
120 x.appendChild(self._print(arg))
121 return x
TypeError: 'Pi' object is not iterable
I am not sure what the situation is exactly. It may have something to do
with "pi" being a self closing tag. In any case I am able to resolve the
issue by changing _print_Basic:
def _print_Basic(self, e):
x = self.dom.createElement(self.mathml_tag(e))
if getattr(e, '__iter__', True):
for arg in e:
x.appendChild(self._print(arg))
return xeturn x
But as you can see this is less then ideal.
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