Status: Valid
Owner: ----
CC: [email protected]
Labels: Type-Defect Priority-Medium
New issue 3681 by [email protected]: bottom_up runs into problem with Pow
http://code.google.com/p/sympy/issues/detail?id=3681
from sympy.strategies.traverse import *
def f(x):
... if x.is_Symbol:
... x += 1
... return x
...
bottom_up(f)(x)
x + 1
bottom_up(f)(x**2)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "sympy\core\basic.py", line 452, in __repr__
return sstr(self, order=None)
File "sympy\printing\str.py", line 670, in sstr
s = p.doprint(expr)
File "sympy\printing\printer.py", line 231, in doprint
return self._str(self._print(expr))
File "sympy\printing\printer.py", line 255, in _print
return getattr(self, printmethod)(expr, *args)
File "sympy\printing\str.py", line 442, in _print_Pow
if expr.is_commutative:
AttributeError: is_commutative
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