python如何设置静态变量

void foo() {
    static int count = 0;
    count ++;
}

def static_vars(**kwargs):
    def decorate(func):
        for k in kwargs:
            setattr(func, k, kwargs[k])
        return func
    return decorate

@static_vars(counter = 0)
def foo():
    foo.counter += 1

__author__ = 'Administrator'
class CaptchaImage:
 def queue(self,arr=list()):
  return arr
 def InsertCode(self,code):
  self.queue().append(code)
if __name__=='__main__':
 c = CaptchaImage()
 c.InsertCode(1)
 b=CaptchaImage()
 b.InsertCode(2)
 print(b.queue())
 print(c.queue())