>>做什么和<<在Python中意味着什么?
问题描述：
我注意到我可以做类似2 << 5来获得64和1000 >> 2来获得250的事情.
I notice that I can do things like 2 << 5 to get 64 and 1000 >> 2 to get 250.
我也可以在print中使用>>:
print >>obj, "Hello world"
这是怎么回事?
答
这些是按位移位运算符.
These are bitwise shift operators.
引用文档:
x << y
返回x，其位向左偏移y个位(右侧的新位为零).这与x乘2**y相同.
Returns x with the bits shifted to the left by y places (and new bits on the right-hand-side are zeros). This is the same as multiplying x by 2**y.
x >> y
返回x，其位向右移y个位.这与将x除以2**y相同.
Returns x with the bits shifted to the right by y places. This is the same as dividing x by 2**y.