20190616——and和or使用方法、python运算符总结、python数据类型

 1 """ 如果有括号：先计算括号内
 2     如果没有括号：
 3     执行顺序：从前到后
 4     结果：True or ==》True
 5         True and ==》继续走
 6         False or ==》继续走
 7         False and ==》Flase
 8 """  
 9 user = 'ales'
10 pwd = '123'
11 v1 = user == 'ales' and pwd == '1233' or user == 'alex' and pwd == '1273' and user == 'alets'
12 v2 = user == 'ales' and (pwd == '1233' or user == 'alex' and pwd == '1273')
13 print(v1)
14 print(v2)

》》》》》》

False
False

 1 结果是值：
 2     算数运算
 3         a=10*10
 4     赋值运算
 5         a=a+1    a+=1
 6 
 7 结果是布尔值
 8     比较运算
 9         a=1>5
10     逻辑运算
11         a=1>6 or 1==1
12     成员运算
13         a=“稳” in “证件问”

python数据类型详见转载文章：
https://www.cnblogs.com/wupeiqi/articles/5444685.html#top