目录
比较运算符

a,b=10,30
print('a>b吗?',a>b)
print('a<b吗?',a<b)
print('a<=b吗?',a>=b)
print(a is b)#这个比较的是id标识
a>b吗? False a<b吗? True a<=b吗? False False
一个变量有三部分组成:1标识,2类型,3值
比较对象的标识使用is
布尔运算符

print(a==1 and b==2)#ture and true-->ture
print(a==1 and b<2)#ture and false-->false
print(a!=1 and b==2)#false and ture-->false
print(a!=1 and b!=2)#false and false -->false
print('---------------or 或者-----------------------------------------')
print(a==1 or b==2)#ture or true-->ture
print(a==1 or b<2)#ture or false-->ture
print(a!=1 or b==2)#false or ture-->ture
print(a!=1 or b!=2)#false and false -->false
print('---------------not 对运算数取反-----------------------------------------')
f=True
f2=False
print(not f)
print(not f2)
print('---------------in 与not in-----------------------------------------')
s='helloworld'
print('w'in s)
print('k'in s)
print('w'not in s)
print('k'not in s)
True True False False False ---------------or 或者----------------------------------------- True True True False ---------------not 对运算数取反----------------------------------------- False True ---------------in 与not in----------------------------------------- True False False True
python中的位运算符


运算符的优先级




