public static TextWriter ToTextWriter(TextWriter writer = null)
{
using (Py.GIL())
{
SysIOStream.TextWriter = writer;
dynamic sys = Py.Import("sys");
sys.stdout = sys.stderr = SysIOStream;
}
return(SysIOStream.TextWriter);
}
public static InteropConfiguration MakeDefault()
{
return(new InteropConfiguration
{
PythonBaseTypeProviders =
{
DefaultBaseTypeProvider.Instance,
new CollectionMixinsProvider(new Lazy <PyObject>(() => Py.Import("clr._extras.collections"))),
},
});
}
public static void Initialize(string backend = null)
{
np = Py.Import("numpy");
matplotlib = Py.Import("matplotlib");
if (!String.IsNullOrEmpty(backend))
{
// backend must be set before pylab be imported
// It can not be changed after pylab be imported
PythonEngine.Exec($"import matplotlib;matplotlib.use('{backend}')");
}
plt = Py.Import("matplotlib.pylab");
PltFigureType = plt.GetAttr("Figure").Handle;
var io = Py.Import("io");
BytesIO = io.GetAttr("BytesIO");
PythonEngine.Exec("import matplotlib;print(matplotlib.get_backend())");
}
public static void Initialize()
{
np = Py.Import("numpy");
NumpyArrayType = np.GetAttr("ndarray").Handle;
np_dtypes.Clear();
np_dtypes.Add(typeof(byte), np.GetAttr("uint8"));
np_dtypes.Add(typeof(short), np.GetAttr("int16"));
np_dtypes.Add(typeof(int), np.GetAttr("int32"));
np_dtypes.Add(typeof(long), np.GetAttr("int64"));
np_dtypes.Add(typeof(ushort), np.GetAttr("uint16"));
np_dtypes.Add(typeof(uint), np.GetAttr("uint32"));
np_dtypes.Add(typeof(ulong), np.GetAttr("uint64"));
np_dtypes.Add(typeof(float), np.GetAttr("float"));
np_dtypes.Add(typeof(double), np.GetAttr("float64"));
var copy = Py.Import("copy");
deepcopy = copy.GetAttr("deepcopy");
}
internal virtual IntPtr Invoke(IntPtr inst, IntPtr args, IntPtr kw, MethodBase info, MethodInfo[] methodinfo)
{
Binding binding = Bind(inst, args, kw, info, methodinfo);
object result;
IntPtr ts = IntPtr.Zero;
if (binding == null)
{
var value = new StringBuilder("No method matches given arguments");
if (methodinfo != null && methodinfo.Length > 0)
{
value.Append($" for {methodinfo[0].Name}");
}
long argCount = Runtime.PyTuple_Size(args);
value.Append(": (");
for (long argIndex = 0; argIndex < argCount; argIndex++)
{
var arg = Runtime.PyTuple_GetItem(args, argIndex);
if (arg != IntPtr.Zero)
{
var type = Runtime.PyObject_Type(arg);
if (type != IntPtr.Zero)
{
try {
var description = Runtime.PyObject_Unicode(type);
if (description != IntPtr.Zero)
{
value.Append(Runtime.GetManagedString(description));
Runtime.XDecref(description);
}
} finally {
Runtime.XDecref(type);
}
}
}
if (argIndex + 1 < argCount)
{
value.Append(", ");
}
}
value.Append(')');
Exceptions.SetError(Exceptions.TypeError, value.ToString());
return(IntPtr.Zero);
}
//allow_threads = true breaks the code with passing pyobjects to clr functions.
//I think this happens because python is not thread safe and objects cannot be called
//different threads
allow_threads = false;
if (allow_threads)
{
Console.WriteLine("ALLOW THR");
ts = PythonEngine.BeginAllowThreads();
}
try
{
result = binding.info.Invoke(binding.inst, BindingFlags.Default, null, binding.args, null);
}
catch (Exception e)
{
if (e.InnerException != null)
{
e = e.InnerException;
}
if (allow_threads)
{
PythonEngine.EndAllowThreads(ts);
}
Exceptions.SetError(e);
return(IntPtr.Zero);
}
if (allow_threads)
{
PythonEngine.EndAllowThreads(ts);
}
// If there are out parameters, we return a tuple containing
// the result followed by the out parameters. If there is only
// one out parameter and the return type of the method is void,
// we return the out parameter as the result to Python (for
// code compatibility with ironpython).
var mi = (MethodInfo)binding.info;
if (binding.outs == 1 && mi.ReturnType == typeof(void))
{
}
if (binding.outs > 0)
{
ParameterInfo[] pi = mi.GetParameters();
int c = pi.Length;
var n = 0;
IntPtr t = Runtime.PyTuple_New(binding.outs + 1);
IntPtr v = Converter.ToPython(result, mi.ReturnType);
Runtime.PyTuple_SetItem(t, n, v);
n++;
for (var i = 0; i < c; i++)
{
Type pt = pi[i].ParameterType;
if (pi[i].IsOut || pt.IsByRef)
{
v = Converter.ToPython(binding.args[i], pt);
Runtime.PyTuple_SetItem(t, n, v);
n++;
}
}
if (binding.outs == 1 && mi.ReturnType == typeof(void))
{
v = Runtime.PyTuple_GetItem(t, 1);
Runtime.XIncref(v);
Runtime.XDecref(t);
return(v);
}
return(t);
}
if (mi.ReturnType == typeof(QuantApp.Kernel.JVM.JVMObject))
{
dynamic pymodule = Py.Import("clr");
result = pymodule.createJVM(result);
}
return(Converter.ToPython(result, mi.ReturnType));
}