Updates:
Status: Invalid
Comment #1 on issue 1295 by goriccardo: Basic class depends on Function and
vice versa
http://code.google.com/p/sympy/issues/detail?id=1295
Thanks for the report. This is fixed in trunk.
In [1]: f = x**2
In [2]: f(2)
TypeError: argument must be a dictionary
Actually calling f(2) is not allowed, you can use:
>>> f({x:2})
or
>>> f.subs(x,2)
or use a Lambda function
In [1]: f = Lambda(x, x**2)
In [2]: f(2)
Out[2]: 4
See also the mailing list threads:
http://groups.google.com/group/sympy/browse_thread/thread/533017c5d941d67a
http://groups.google.com/group/sympy-patches/browse_thread/thread/628ebc799ee57ec1/
I'm closing this as Invalid
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