python8

#布尔运算符
a, b=1,2
print('------------------and 并且---------------------------')
print(a==1 and b==2)        #True           True and True->True
print(a==1 and b<2)         #False          True   and False ->False
print(a!=1 and b==2)        #False          False and True-->False
print(a!=1 and b!=2)        #False          False and False ->False


print('-----------------or 或者-----------------------------')
print(a==1 or b==2 )     #True or True->True
print(a==1 or b<2)        #True or False->True
print(a!=1 or b==2)        #False or True->True
print(a!=1 or b!=2)         #False or False->False


print('------------not  对bool类型操作数取反--------------------')
f=True
f2=False
print(not f)
print(not f2)



print('---------------------- in  与  not--------------------')
s='helloworld'
print('w' in s)
print('k' in s)
print('w'not in s)
print('k' not in s)