Sorry, I didn't realize that. Here's the code.
---
def symbolic_function(variables, *args, **kwds):
def result(f):
def evalf_func(self,x,parent=None):
if parent == None:
return f(x)
else:
return parent(f(x))
return function(f.__name__, variables, evalf_func=evalf_func,
*args, **kwds).operator()
return result
@symbolic_function(x)
def steps(x):
if x < 0:
return -x
elif x < 3:
return x
else:
return 3
steps(5)
n(steps(5))
plot(steps(x),(x,-3,6))
--
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