布尔运算符

a,b=1,2

# 有一个为假即为假
print(a==1 and b==2) # True and True = True
print(a==1 and b<2)  # True and False = False

# 有一个为真即为真
print(a==1 or b==2)  # True or True = True
print(a==1 or b<2)   # True or False = True

t=True
f=False
print(not f)

s=‘helloworld‘
print(‘w‘ in s)
print(‘k‘ in s)
print(‘w‘ not in s)
print(‘k‘ not in s)