| We would like arbitrary functions of arbitrary parameters and
independent variables:
f = StringFunction_v5('A*sin(x)*exp(-b*t)', A=0.1, b=1,
independent_variables=('x','t'))
print f(1.5, 0.01) # x=1.5, t=0.01
|
| Idea: add functionality in subclass
class StringFunction_v5(StringFunction_v4):
def __init__(self, expression, **kwargs):
StringFunction_v4.__init__(self, expression, **kwargs)
self._var = tuple(kwargs.get('independent_variables',
'x'))
try: del self._prms['independent_variables']
except: pass
def __call__(self, *args):
for name, value in zip(self._var, args):
self._prms[name] = value # add indep. variable
return eval(self._f_compiled,
self._globals, self._prms)
|
