/// <summary>
/// Initialization performed on startup of the Python runtime.
/// </summary>
internal static void Initialize()
{
string exceptionsModuleName = Runtime.IsPython3 ? "builtins" : "exceptions";
exceptions_module = Runtime.PyImport_ImportModule(exceptionsModuleName);
Exceptions.ErrorCheck(exceptions_module);
warnings_module = Runtime.PyImport_ImportModule("warnings");
Exceptions.ErrorCheck(warnings_module);
Type type = typeof(Exceptions);
foreach (FieldInfo fi in type.GetFields(BindingFlags.Public | BindingFlags.Static))
{
IntPtr op = Runtime.PyObject_GetAttrString(exceptions_module, fi.Name);
if (op != IntPtr.Zero)
{
fi.SetValue(type, op);
}
else
{
fi.SetValue(type, IntPtr.Zero);
DebugUtil.Print($"Unknown exception: {fi.Name}");
}
}
Runtime.PyErr_Clear();
}
//====================================================================
// helper methods for raising warnings
//====================================================================
/// <summary>
/// Alias for Python's warnings.warn() function.
/// </summary>
public static void warn(string message, IntPtr exception, int stacklevel)
{
if (exception == IntPtr.Zero ||
(Runtime.PyObject_IsSubclass(exception, Exceptions.Warning) != 1))
{
Exceptions.RaiseTypeError("Invalid exception");
}
Runtime.XIncref(warnings_module);
IntPtr warn = Runtime.PyObject_GetAttrString(warnings_module, "warn");
Runtime.XDecref(warnings_module);
Exceptions.ErrorCheck(warn);
IntPtr args = Runtime.PyTuple_New(3);
IntPtr msg = Runtime.PyString_FromString(message);
Runtime.XIncref(exception); // PyTuple_SetItem steals a reference
IntPtr level = Runtime.PyInt_FromInt32(stacklevel);
Runtime.PyTuple_SetItem(args, 0, msg);
Runtime.PyTuple_SetItem(args, 1, exception);
Runtime.PyTuple_SetItem(args, 2, level);
IntPtr result = Runtime.PyObject_CallObject(warn, args);
Exceptions.ErrorCheck(result);
Runtime.XDecref(warn);
Runtime.XDecref(result);
Runtime.XDecref(args);
}
