def parsedesc(string):
expr, rest = string.split(' is a function of ')
var_and_params = rest.split(' with parameter ')
func = StringFunction(expr, independent_variable=var_and_params[0])
if len(var_and_params) > 1:
parameters = eval("dict(%s)" % var_and_params[1])
func.set_parameters(**parameters)
return func
def test_set_parameters(self):
f = StringFunction('a+b*x', a=1)
f.set_parameters(b=4)
v = f(2)
self.failUnlessEqual(v, 9, 'wrong value')
