Discuss / Python / 求教
Back

求教

Topic source

Metaphysic

#1 Created at ... [Delete] [Delete and Lock User]

s1=set([1,2,3]) s2=set([2,3,4]) print(s1 and s2) print(s1&s2)

and 和 & 有啥区别？

打哭你是为了有机会哄你

#2 Created at ... [Delete] [Delete and Lock User]

and=|，&=or我是这么理解的

-绿贱超人-

#3 Created at ... [Delete] [Delete and Lock User]

| is the union operator; & is the intersection operator;

  • is the difference operator; ^ is the symmetric difference operator.

-绿贱超人-

#4 Created at ... [Delete] [Delete and Lock User] 
| is the union operator;
& is the intersection operator;
- is the difference operator;
^ is the symmetric difference operator.

找个时间去旅行

#5 Created at ... [Delete] [Delete and Lock User]

在Python 中，and 和 or 执行布尔逻辑演算，如你所期待的一样，但是它们并不返回布尔值；而是，返回它们实际进行比较的值之一。

复制代码

'a' and 'b' 'b' '' and 'b' '' 'a' and 'b' and 'c' 'c' 复制代码 在布尔上下文中从左到右演算表达式的值，如果布尔上下文中的所有值都为真，那么 and 返回最后一个值。

如果布尔上下文中的某个值为假，则 and 返回第一个假值

参考： http://www.cnblogs.com/BeginMan/p/3197123.html

  • 1

Reply