I am attempting to run the example:
http://docs.sympy.org/latest/modules/vector/examples.html#third-product-rule-for-del-operator
Running the following, using sympy (1.0) installed with miniconda in Python
2.7, yields an error. Any help resolving this issue would be appreciated.
CODE:
from sympy.vector import CoordSysCartesian
C = CoordSysCartesian('C')
from sympy import symbols
v1, v2, v3 = symbols('v1 v2 v3 f', type="Function")
v = v1(C.x, C.y, C.z)*C.i + v2(C.x, C.y, C.z)*C.j + v3(C.x, C.y, C.z)*C.z
ERROR:
Traceback (most recent call last):
File "LevelSetAdvectionSUPG.py", line 6, in <module>
v = v1(C.x, C.y, C.z)*C.i + v2(C.x, C.y, C.z)*C.j + v3(C.x, C.y, C.z)*C.
z
File
"/opt/moose/miniconda/lib/python2.7/site-packages/sympy/core/decorators.py",
line 118, in binary_op_wrapper
return func(self, other)
File
"/opt/moose/miniconda/lib/python2.7/site-packages/sympy/vector/basisdependent.py"
, line 19, in __add__
return self._add_func(self, other)
File
"/opt/moose/miniconda/lib/python2.7/site-packages/sympy/vector/vector.py",
line 399, in __new__
obj = BasisDependentAdd.__new__(cls, *args, **options)
File
"/opt/moose/miniconda/lib/python2.7/site-packages/sympy/vector/basisdependent.py"
, line 196, in __new__
for x in arg.components:
AttributeError: 'Mul' object has no attribute 'components'
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