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  • 运算符py

    """
    逻辑运算:
    """

    # 算术运算: + - * / % **
    a = 10
    b = 3
    # print(a % b)
    # print(2**2)
    # print(a // b)

    # 比较运算: == != > < >= <=
    # print(3 != 2)

    # 赋值运算: += -= * / % **

    # 逻辑运算:not and or
    # 优先级:() not and or :同一优先级从左之后依次计算
    # 1,逻辑运算两边都是比较

    # print(3 > 2 and 3 < 4 or 5 > 6 and 2 < 5)
    # print(1 > 1 and 3 < 4 or 4 > 5 and 2 > 1 and 9 > 8 or 7 < 6)
    # print(True or False)

    # 2,逻辑运算两边都是数值
    '''
    x or y ,if x is True, return x,else return y.
    x and y ,if x is True, return y,else return x.
    '''
    # print(1 or 3)
    # print(100 or 3)
    # print(-10 or 3)
    # print(0 or 3)
    # print(1 and 3 or 4)
    # print(0 and 3 or 5)
    """
    # int bool之间的转换
    # int ---> bool:非零即True.
    print(bool(100))
    # bool ---> int :True 1, False 0
    print(int(True))
    print(int(False))
    """

    # 3,逻辑运算两边是数值或者比较

    # print(1 and 4 < 6 or 5)

    # 成员运算:判断某些元素在不在一个序列中 str,tuple list dict set
    # in not in
    # s1 = 'ab'
    # s11 = 'ak'
    # s2 = 'abkfjdljkgljfkdsag'
    # print(s1 in s2)
    # print(s11 in s2)

    # conment = input('>>')
    # s1 = 'TMD'
    # print(2**32)
    努力到无能为力,拼搏到感动自己。
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  • 原文地址:https://www.cnblogs.com/jin-yuana/p/9832078.html
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