Hi:
Does anyone know if there is a workaround for this error I get
(from running sympy in Sage)?It seems to be a known issue
http://code.google.com/p/sympy/issues/detail?id=1211
- David
sage: from sympy import Function, Derivative, dsolve, symbols
sage: from sympy.abc import x
sage: f = Function("f")(x)
sage: k = symbols('k')
sage: dsolve(Derivative(f(x),x,x)-k^2*f(x), f(x),
hint='nth_linear_constant_coeff_homogeneous')
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
/Users/wdj/sagefiles/sage-4.5.alpha3/<ipython console> in <module>()
/Users/wdj/sagefiles/sage-4.5.alpha3/local/lib/python2.6/site-packages/sympy/core/basic.pyc
in __call__(self, subsdict)
1944 """Use call as a shortcut for subs, but only support
the dictionary version"""
1945 if not isinstance(subsdict, dict):
-> 1946 raise TypeError("argument must be a dictionary")
1947 return self.subs(subsdict)
1948
TypeError: argument must be a dictionary
sage: dsolve(Derivative(f(x),x,x)-k**2*f(x), f(x),
hint='nth_linear_constant_coeff_homogeneous')
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
/Users/wdj/sagefiles/sage-4.5.alpha3/<ipython console> in <module>()
/Users/wdj/sagefiles/sage-4.5.alpha3/local/lib/python2.6/site-packages/sympy/core/basic.pyc
in __call__(self, subsdict)
1944 """Use call as a shortcut for subs, but only support
the dictionary version"""
1945 if not isinstance(subsdict, dict):
-> 1946 raise TypeError("argument must be a dictionary")
1947 return self.subs(subsdict)
1948
TypeError: argument must be a dictionary
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