GNUC库具有函数drem(别名remainder)。如何仅使用modules模拟此功能GoogleAppEnginePython2.7运行时支持吗？来自GNUmanual对于drem:Thesefunctionsarelikefmodexceptthattheyroundtheinternalquotientntothenearestintegerinsteadoftowardszerotoaninteger.Forexample,drem(6.5,2.3)returns-0.4,whichis6.5minus6.9.来自GNUmanual对于fmod:Thesefunctionsc