spreadsheet_formula.py 文件源码

def get_default_operators():
    """ generate a mapping of default operators allowed for evaluation """
    return {
        'u-': Func(1, operator.neg),             # unary negation
        'u%': Func(1, lambda a: a / Decimal(100)), # unary percentage
        '&': Func(2, operator.concat),
        '^': Func(2, operator.pow),
        '+': Func(2, op_add),
        '-': Func(2, operator.sub),
        '/': Func(2, operator.truediv),
        '*': Func(2, operator.mul),
        '=': Func(2, operator.eq),
        '<>': Func(2, lambda a, b: not operator.eq(a, b)),
        '>': Func(2, operator.gt),
        '<': Func(2, operator.lt),
        '>=': Func(2, operator.ge),
        '<=': Func(2, operator.le),
    }