python 逻辑运算符

# python 逻辑运算符
a = 4 > 1 # True
b = 5 > 2 # False
c = 8 == 8 # True
d = 9 < 6 # False

print( a and b ) # False
print( a and c ) # True
print( a or b ) #True
print( b or d) # False
print( not a ) # False
# 逻辑运算符优先级为 not > and > or
r1 = a and b or c and not d
# a and b or c and True
# False or True
# True
print(r1)
# 由内到外
r2 = (a and (not b or c)) and d
# (a and (True or c)) and d
# (a and True) and d
# True and d
# False
print(r2)

运行结果：