utils.py 文件源码

def opstr_to_op(opstr):
    if opstr == "<=":
        return operator.le
    elif opstr == ">=":
        return operator.ge
    elif opstr == "<":
        return operator.lt
    elif opstr == ">":
        return operator.gt
    elif opstr == "=":
        return operator.eq
    elif opstr == "-":
        return operator.sub
    elif opstr == "+":
        return operator.add
    elif opstr == "/":
        return operator.div
    elif opstr == "*":
        return operator.mul
    elif opstr == "and":
        return operator.and_
    elif opstr == "or":
        return operator.or_
    elif opstr == "not":
        return operator.not_
    else:
        raise Exception("Opstr not supported: {}".format(opstr))