python中3 and not 5_python3 not and or逻辑运算顺序

'''and 并且，与

or 或

not 非

逻辑运算的运算顺序：（）> not > and > or'''

print(3 > 4 or 4 < 3 and 1 == 1) #f or f and t => f or f => f

print(1 < 2 and 3 < 4 or 1 > 2) #t and t or f => t or f => t

print(2 > 1 and 3 < 4 or 4 > 5 and 2 < 1) #t and t or f and f => t or f =》 t

print(1 > 2 and 3 < 4 or 4 > 5 and 2 > 1 or 9 < 8) #f and t or f and t or f => f or f or f => f

print(1 > 1 and 3 < 4 or 4 > 5 and 2 > 1 and 9 > 8 or 7 < 6) #f and f or f and t and t or f => f or f and t or f => f

print(not 2 > 1 and 3 < 4 or 4 > 5 and 2 > 1 and 9 > 8 or 7 < 6) #f and t or f and t and t or f => f or f or f => f

'''打印结果：

False

True

True

False

False

False

总结：使用负责的逻辑运算的时候切记加括号。'''

print(bool(0)) #False

print(bool(1)) #True

print(bool(-1)) #True

print(bool("")) #False

print(bool(" ")) #True

print(bool("哈哈")) #True

print(bool([])) #False

print(bool([1, 2, 3])) #True

print(bool({})) #False

'''结论：所有表示空的东西都是False。'''

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