如何在C＃中提取IronPython脚本参数的名称

I have a Python script as follows:

我有一个Python脚本如下：

def VSH(GR, GRsand, GRshale): 
    '''Calculates Vsh from gamma inputs'''
    value = (((GR-GRsand)/(GRshale-GRsand)))
    if (value > 100.0):
      value = 100.0
    elif (value < 0.0):
        value = 0.0
    return value

From C# I have a loop that in IronPython 2.2 would extract the 3 arguments.

从C＃我有一个循环，在IronPython 2.2中将提取3个参数。

foreach (string variableName in (PythonTuple)inputFunction.func_code.co_varnames)
{
    // do something here
}

Now in IronPython 2.7.5 I get the names of the 4 variables, which makes sense, but breaks the old code. From the watch I get:

现在在IronPython 2.7.5中，我得到了4个变量的名称，这是有道理的，但打破了旧代码。从手表我得到：

co_varnames tuple, 4 items  IronPython.Runtime.PythonTuple
[0] "GR"    object {string}
[1] "GRsand"    object {string}
[2] "GRshale"   object {string}
[3] "value" object {string}

Looking at the object inputFunction.func_code in the debugger, I don't see anything that would return just the arguments. I do see the property co_argcount = 3. If I could be sure that the arguments were always first in the list of variables, then I could use it to filter out the local variables. Any suggestions?

查看调试器中的对象inputFunction.func_code，我没有看到任何只返回参数的东西。我确实看到属性co_argcount = 3.如果我可以确定参数总是在变量列表中的第一个，那么我可以用它来过滤掉局部变量。有什么建议么？

1 个解决方案

#1

Here's my solution:

这是我的解决方案：

// using System.Reflection;
dynamic func = scope.GetVariable("VSH");
var code = func.__code__;
var argNamesProperty = code.GetType().GetProperty("ArgNames", BindingFlags.NonPublic | BindingFlags.Instance);
string[] argNames = (string[])argNamesProperty.GetValue(code, null);
// argNames = ["GR", "GRsand", "GRshale"]

You were looking in the right place, but unfortunately the IronPython.Runtime.FunctionCode.ArgNames property is private. With reflection, we can ignore that and just get the argument names anyway.

您正在寻找合适的位置，但不幸的是IronPython.Runtime.FunctionCode.ArgNames属性是私有的。通过反射，我们可以忽略它，并且无论如何只需获取参数名称。

Here's my complete test setup:

这是我完整的测试设置：

static void Main(string[] args)
{
    ScriptEngine engine = Python.CreateEngine();
    ScriptScope scope = engine.CreateScope();
    ObjectOperations ops = engine.CreateOperations();
    ScriptSource source = engine.CreateScriptSourceFromString(@"
def VSH(GR, GRsand, GRshale): 
    '''Calculates Vsh from gamma inputs'''
    value = (((GR-GRsand)/(GRshale-GRsand)))
    if (value > 100.0):
        value = 100.0
    elif (value < 0.0):
        value = 0.0
    return value");
    CompiledCode compiled = source.Compile();
    compiled.Execute(scope);

    dynamic func = scope.GetVariable("VSH");
    var code = func.__code__;
    var argNamesProperty = code.GetType().GetProperty("ArgNames", BindingFlags.NonPublic | BindingFlags.Instance);
    string[] argNames = (string[])argNamesProperty.GetValue(code, null);
    // argNames = ["GR", "GRsand", "GRshale"]
}

I'm sure that you can trim down everything before the dynamic func = ... line, because you probably have access to your VSH function already.

我确信您可以在动态func = ...行之前减少所有内容，因为您可能已经可以访问您的VSH功能。

#1