phyton如何遍历全国的经纬度数据

def get_area(x_max=123605):
    x0 = 123303
    y0 = 41723
    x_max = x_max
    y_max = 42913
    for x in range(x_max,x0,-30):
        for y in range(y_max,y0,-50):
            point='[%d,%d]'%(x,y)
            yield point
a=get_area()

for i in a:

     {

     写需要处理的业务代码

}