Replace
F = Function('F')(x)
with
F = Function('F')
On Fri, Jul 26, 2013 at 1:21 PM, Alan Bromborsky <[email protected]>wrote:
> Consider the code -
>
> from sympy import symbols, exp, Function
>
> def f(x):
> return x**2
>
> def g(y):
> return 2*exp(y)
>
> def add(f,g):
> def sumfg(x):
> return f(x)+g(x)
> return sumfg
>
> def mul(f,g):
> def prodfg(x):
> return f(g(x))
> return prodfg
>
> x = symbols('x',real=True)
>
> fxg = mul(f,g)
>
> print fxg(x)
>
> F = Function('F')(x)
>
> print mul(g,F)(x)
>
>
> The output is -
>
> 4*exp(2*x)
> Traceback (most recent call last):
> File "ftest.py", line 27, in <module>
> print mul(g,F)(x)
> File "ftest.py", line 16, in prodfg
> return f(g(x))
> TypeError: 'F' object is not callable
>
> One would like the second output to be -
>
> 2*exp(F(x))
>
> What am I doing wrong?
>
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