transformations.py 文件源码

def reverse(op):
    """Reverse the direction of the comparison for normalization purposes"""
    rev = not op.reversed if hasattr(op, "reversed") else True
    if type(op) == ast.Gt:
        newOp = ast.Lt()
        transferMetaData(op, newOp)
        newOp.reversed = rev
        return newOp
    elif type(op) == ast.GtE:
        newOp = ast.LtE()
        transferMetaData(op, newOp)
        newOp.reversed = rev
        return newOp
    else:
        return op # Do not change!