我不确定您能做到这一点（例如，使用十进制类或numpy）而不修改c代码吗？无需修改C代码。 ctypes似乎对 long double s的支持确实很差-您根本无法像数字一样操纵它们，您所能做的就是在本机 float Python类型。

I'm not sure you can do it without modifying the C code. ctypes seems to have really bad support for long doubles - you can't manipulate them like numbers at all, all you can do is convert them back and forth between the native float Python type.

您甚至不能使用字节数组作为返回值，而不能使用 c_longdouble ，由于ABI的缘故，浮点值不会像普通返回一样在％eax 寄存器或堆栈中返回值，它们通过硬件专用的浮点寄存器传递。

You can't even use a byte array as the return value instead of a c_longdouble, because of the ABI - floating-point values aren't returned in the %eax register or on the stack like normal return values, they're passed through the hardware-specific floating-point registers.