# -*- coding: utf-8 -*-

from ctypes import  *

lib = cdll.LoadLibrary('./libfoo.so')


class Foo(object):
    def __init__(self):
        self.obj = lib.Foo_new()
        lib.Foo_bar.restype = c_double

    def bar(self, a, b, c, d):
        return lib.Foo_bar(self.obj, c_double(a), c_double(b), c_double(c), c_double(d))


f = Foo()
a = 1
b = 2.5
c = 3.5
d = 3.5

print f.bar(a, b, c, d)