/// <summary>
/// PyObject Indexer
/// </summary>
/// <remarks>
/// Provides a shorthand for the object versions of the GetItem and
/// SetItem methods.
/// </remarks>
public virtual PyObject this[PyObject key] {
get { return(GetItem(key)); }
set { SetItem(key, value); }
}
/// <summary>
/// SetItem Method
/// </summary>
/// <remarks>
/// For objects that support the Python sequence or mapping protocols,
/// set the item at the given string index to the given value. This
/// method raises a PythonException if the set operation fails.
/// </remarks>
public virtual void SetItem(string key, PyObject value)
{
using (var pyKey = new PyString(key)) {
SetItem(pyKey, value);
}
}
/// <summary>
/// SetItem Method
/// </summary>
/// <remarks>
/// For objects that support the Python sequence or mapping protocols,
/// set the item at the given numeric index to the given value. This
/// method raises a PythonException if the set operation fails.
/// </remarks>
public virtual void SetItem(int index, PyObject value)
{
using (var pyindex = new PyInt(index)) {
SetItem(pyindex, value);
}
}
/// <summary>
/// TypeCheck Method
/// </summary>
/// <remarks>
/// Returns true if the object o is of type typeOrClass or a subtype
/// of typeOrClass.
/// </remarks>
public bool TypeCheck(PyObject typeOrClass)
{
return(Runtime.PyObject_TypeCheck(obj, typeOrClass.obj));
}
/// <summary>
/// HasAttr Method
/// </summary>
/// <remarks>
/// Returns true if the object has an attribute with the given name,
/// where name is a PyObject wrapping a string or unicode object.
/// </remarks>
public bool HasAttr(PyObject name)
{
return(Runtime.PyObject_HasAttr(obj, name.obj) != 0);
}
/// <summary>
/// IsFloatType Method
/// </summary>
/// <remarks>
/// Returns true if the given object is a Python float.
/// </remarks>
public static bool IsFloatType(PyObject value)
{
return(Runtime.PyFloat_Check(value.obj));
}
/// <summary>
/// IsStringType Method
/// </summary>
/// <remarks>
/// Returns true if the given object is a Python string.
/// </remarks>
public static bool IsStringType(PyObject value)
{
return(Runtime.PyString_Check(value.obj));
}
internal static bool ToManagedValue(IntPtr value, Type obType,
out object result, bool setError)
{
if (obType == typeof(PyObject))
{
Runtime.XIncref(value); // PyObject() assumes ownership
result = new PyObject(value);
return(true);
}
// Common case: if the Python value is a wrapped managed object
// instance, just return the wrapped object.
ManagedType mt = ManagedType.GetManagedObject(value);
result = null;
if (mt != null)
{
if (mt is CLRObject)
{
object tmp = ((CLRObject)mt).inst;
if (obType.IsInstanceOfType(tmp))
{
result = tmp;
return(true);
}
Exceptions.SetError(Exceptions.TypeError, $"value cannot be converted to {obType}");
return(false);
}
if (mt is ClassBase)
{
result = ((ClassBase)mt).type;
return(true);
}
// shouldn't happen
return(false);
}
if (value == Runtime.PyNone && !obType.IsValueType)
{
result = null;
return(true);
}
if (obType.IsGenericType && obType.GetGenericTypeDefinition() == typeof(Nullable <>))
{
if (value == Runtime.PyNone)
{
result = null;
return(true);
}
// Set type to underlying type
obType = obType.GetGenericArguments()[0];
}
if (obType.IsArray)
{
return(ToArray(value, obType, out result, setError));
}
if (obType.IsEnum)
{
return(ToEnum(value, obType, out result, setError));
}
// Conversion to 'Object' is done based on some reasonable default
// conversions (Python string -> managed string, Python int -> Int32 etc.).
if (obType == objectType)
{
if (Runtime.IsStringType(value))
{
return(ToPrimitive(value, stringType, out result, setError));
}
if (Runtime.PyBool_Check(value))
{
return(ToPrimitive(value, boolType, out result, setError));
}
if (Runtime.PyInt_Check(value))
{
return(ToPrimitive(value, int32Type, out result, setError));
}
if (Runtime.PyLong_Check(value))
{
return(ToPrimitive(value, int64Type, out result, setError));
}
if (Runtime.PyFloat_Check(value))
{
return(ToPrimitive(value, doubleType, out result, setError));
}
if (Runtime.PySequence_Check(value))
{
return(ToArray(value, typeof(object[]), out result, setError));
}
if (setError)
{
Exceptions.SetError(Exceptions.TypeError, "value cannot be converted to Object");
}
return(false);
}
// Conversion to 'Type' is done using the same mappings as above for objects.
if (obType == typeType)
{
if (value == Runtime.PyStringType)
{
result = stringType;
return(true);
}
if (value == Runtime.PyBoolType)
{
result = boolType;
return(true);
}
if (value == Runtime.PyIntType)
{
result = int32Type;
return(true);
}
if (value == Runtime.PyLongType)
{
result = int64Type;
return(true);
}
if (value == Runtime.PyFloatType)
{
result = doubleType;
return(true);
}
if (value == Runtime.PyListType || value == Runtime.PyTupleType)
{
result = typeof(object[]);
return(true);
}
if (setError)
{
Exceptions.SetError(Exceptions.TypeError, "value cannot be converted to Type");
}
return(false);
}
return(ToPrimitive(value, obType, out result, setError));
}
internal static IntPtr ToPython(object value, Type type)
{
if (value is PyObject)
{
IntPtr handle = ((PyObject)value).Handle;
Runtime.XIncref(handle);
return(handle);
}
IntPtr result = IntPtr.Zero;
// Null always converts to None in Python.
if (value == null)
{
result = Runtime.PyNone;
Runtime.XIncref(result);
return(result);
}
if (value is IList && !(value is INotifyPropertyChanged) && value.GetType().IsGenericType)
{
using (var resultlist = new PyList())
{
foreach (object o in (IEnumerable)value)
{
using (var p = new PyObject(ToPython(o, o?.GetType())))
{
resultlist.Append(p);
}
}
Runtime.XIncref(resultlist.Handle);
return(resultlist.Handle);
}
}
// it the type is a python subclass of a managed type then return the
// underlying python object rather than construct a new wrapper object.
var pyderived = value as IPythonDerivedType;
if (null != pyderived)
{
#if NETSTANDARD
return(ClassDerivedObject.ToPython(pyderived));
#else
// if object is remote don't do this
if (!System.Runtime.Remoting.RemotingServices.IsTransparentProxy(pyderived))
{
return(ClassDerivedObject.ToPython(pyderived));
}
#endif
}
// hmm - from Python, we almost never care what the declared
// type is. we'd rather have the object bound to the actual
// implementing class.
type = value.GetType();
TypeCode tc = Type.GetTypeCode(type);
switch (tc)
{
case TypeCode.Object:
return(CLRObject.GetInstHandle(value, type));
case TypeCode.String:
return(Runtime.PyUnicode_FromString((string)value));
case TypeCode.Int32:
return(Runtime.PyInt_FromInt32((int)value));
case TypeCode.Boolean:
if ((bool)value)
{
Runtime.XIncref(Runtime.PyTrue);
return(Runtime.PyTrue);
}
Runtime.XIncref(Runtime.PyFalse);
return(Runtime.PyFalse);
case TypeCode.Byte:
return(Runtime.PyInt_FromInt32((int)((byte)value)));
case TypeCode.Char:
return(Runtime.PyUnicode_FromOrdinal((int)((char)value)));
case TypeCode.Int16:
return(Runtime.PyInt_FromInt32((int)((short)value)));
case TypeCode.Int64:
return(Runtime.PyLong_FromLongLong((long)value));
case TypeCode.Single:
// return Runtime.PyFloat_FromDouble((double)((float)value));
string ss = ((float)value).ToString(nfi);
IntPtr ps = Runtime.PyString_FromString(ss);
IntPtr op = Runtime.PyFloat_FromString(ps, IntPtr.Zero);
Runtime.XDecref(ps);
return(op);
case TypeCode.Double:
return(Runtime.PyFloat_FromDouble((double)value));
case TypeCode.SByte:
return(Runtime.PyInt_FromInt32((int)((sbyte)value)));
case TypeCode.UInt16:
return(Runtime.PyInt_FromInt32((int)((ushort)value)));
case TypeCode.UInt32:
return(Runtime.PyLong_FromUnsignedLong((uint)value));
case TypeCode.UInt64:
return(Runtime.PyLong_FromUnsignedLongLong((ulong)value));
default:
if (value is IEnumerable)
{
using (var resultlist = new PyList())
{
foreach (object o in (IEnumerable)value)
{
using (var p = new PyObject(ToPython(o, o?.GetType())))
{
resultlist.Append(p);
}
}
Runtime.XIncref(resultlist.Handle);
return(resultlist.Handle);
}
}
result = CLRObject.GetInstHandle(value, type);
return(result);
}
}
/// <summary>
/// IsSequenceType Method
/// </summary>
/// <remarks>
/// Returns true if the given object implements the sequence protocol.
/// </remarks>
public static bool IsSequenceType(PyObject value)
{
return(Runtime.PySequence_Check(value.obj));
}
