Python中a,b = b,a+b 和 a=b b=a+b的区别?def fib(max):\x09n,a,b = 0,0,1\x09while n < max:\x09\x09print b\x09\x09a= b\x09\x09b = a + b\x09\x09n = n+1\x09\x09def fib1(max):\x09n,a,b = 0,0,1\x09while n < max:\x09\x09print b\x09\x09a,b= b,a+b\x09\x09n