/// <summary>
/// GetItem Method
/// </summary>
/// <remarks>
/// For objects that support the Python sequence or mapping protocols,
/// return the item at the given numeric index. This method raises a
/// PythonException if the indexing operation fails.
/// </remarks>
public virtual PyObject GetItem(int index)
{
using (var key = new PyInt(index))
{
return(GetItem(key));
}
}
/// <summary>
/// DelItem Method
/// </summary>
/// <remarks>
/// For objects that support the Python sequence or mapping protocols,
/// delete the item at the given numeric index. This method raises a
/// PythonException if the delete operation fails.
/// </remarks>
public virtual void DelItem(int index)
{
using (var pyindex = new PyInt(index))
{
DelItem(pyindex);
}
}
/// <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);
}
}
public static PyObject NewArray(Array content)
{
// BlockCopy possibly multidimensional array of arbitrary type to onedimensional byte array
System.Type ElementType = content.GetType().GetElementType();
int nbytes = content.Length * Marshal.SizeOf(ElementType);
byte[] data = new byte[nbytes];
System.Buffer.BlockCopy(content, 0, data, 0, nbytes);
// Create an python tuple with the dimensions of the input array
PyObject[] lengths = new PyObject[content.Rank];
for (int i = 0; i < content.Rank; i++)
{
lengths[i] = new PyInt(content.GetLength(i));
}
PyTuple shape = new PyTuple(lengths);
// Create an empty numpy array in correct shape and datatype
var dtype = GetNumpyDataType(ElementType);
var arr = np.InvokeMethod("empty", shape, dtype);
var meta = arr.GetAttr("__array_interface__");
var address = new System.IntPtr((long)meta["data"][0].As <long>());
// Copy the data to that array
Marshal.Copy(data, 0, address, nbytes);
return(arr);
}
/// <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)
{
if (value == null)
{
throw new ArgumentNullException(nameof(value));
}
using (var pyindex = new PyInt(index))
{
SetItem(pyindex, value);
}
}
/// <summary>
/// GetItem Method
/// </summary>
///
/// <remarks>
/// For objects that support the Python sequence or mapping protocols,
/// return the item at the given numeric index. This method raises a
/// PythonException if the indexing operation fails.
/// </remarks>
public virtual PyObject GetItem(int index)
{
PyInt key = new PyInt(index);
return GetItem((PyObject)key);
}
/// <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 (PyInt pyindex = new PyInt(index))
{
SetItem(pyindex, value);
}
}
/// <summary>
/// GetItem Method
/// </summary>
///
/// <remarks>
/// For objects that support the Python sequence or mapping protocols,
/// return the item at the given numeric index. This method raises a
/// PythonException if the indexing operation fails.
/// </remarks>
public virtual PyObject GetItem(int index)
{
using (PyInt key = new PyInt(index))
{
return GetItem((PyObject)key);
}
}
/// <summary>
/// DelItem Method
/// </summary>
///
/// <remarks>
/// For objects that support the Python sequence or mapping protocols,
/// delete the item at the given numeric index. This method raises a
/// PythonException if the delete operation fails.
/// </remarks>
public virtual void DelItem(int index)
{
using (PyInt pyindex = new PyInt(index))
{
DelItem(pyindex);
}
}
public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
{
if (value == null)
{
serializer.Serialize(writer, null);
return;
}
var jobj = (PyObject)value;
var jojb_type = jobj.GetPythonType().ToString();
if (jojb_type == "<class 'NoneType'>")
{
writer.WriteNull();
}
else if (PyDict.IsDictType(jobj))
{
var dict = new PyDict(jobj);
var keys = dict.Keys();
writer.WriteStartObject();
foreach (PyObject key in keys)
{
string name = key.ToString();
var val = jobj[key];//.ToString();
writer.WritePropertyName(name);
serializer.Serialize(writer, val, null);
}
writer.WriteEndObject();
}
else if (PyLong.IsLongType(jobj))
{
var pobj = new PyLong(jobj);
writer.WriteValue(pobj.ToInt64());
}
else if (PyInt.IsIntType(jobj))
{
var pobj = new PyInt(jobj);
writer.WriteValue(pobj.ToInt32());
}
else if (PyFloat.IsFloatType(jobj))
{
var pobj = new PyFloat(jobj);
writer.WriteValue(pobj.ToDouble());
}
else if (PyString.IsStringType(jobj) || jojb_type == "<class 'datetime.date'>")
{
// var pobj = new PyString(jobj);
writer.WriteValue(jobj.ToString());
}
else if (jobj.IsIterable())// && !PyDict.IsDictType(jobj))
{
writer.WriteStartArray();
foreach (var element in jobj)
{
serializer.Serialize(writer, element, null);
}
writer.WriteEndArray();
}
else
{
var properties = jobj.Dir();
if (properties != null)
{
writer.WriteStartObject();
foreach (PyObject property in properties)
{
string name = property.ToString();
if (!property.IsCallable() && !name.StartsWith("__"))
{
var attr = jobj.GetAttr(property);//.ToString();
writer.WritePropertyName(name);
try
{
serializer.Serialize(writer, attr, null);
}
catch
{
writer.WriteNull();
}
}
}
writer.WriteEndObject();
}
}
}
/// <summary>
/// GetItem Method
/// </summary>
///
/// <remarks>
/// For objects that support the Python sequence or mapping protocols,
/// return the item at the given numeric index. This method raises a
/// PythonException if the indexing operation fails.
/// </remarks>
public virtual PyObject GetItem(int index)
{
PyInt key = new PyInt(index);
return(GetItem((PyObject)key));
}
internal static bool ToManagedValue(BorrowedReference value, Type obType,
out object?result, bool setError)
{
if (obType == typeof(PyObject))
{
result = new PyObject(value);
return(true);
}
if (obType.IsSubclassOf(typeof(PyObject)) &&
!obType.IsAbstract &&
obType.GetConstructor(new[] { typeof(PyObject) }) is { } ctor)
{
var untyped = new PyObject(value);
result = ToPyObjectSubclass(ctor, untyped, setError);
return(result is not null);
}
// Common case: if the Python value is a wrapped managed object
// instance, just return the wrapped object.
result = null;
switch (ManagedType.GetManagedObject(value))
{
case CLRObject co:
object tmp = co.inst;
if (obType.IsInstanceOfType(tmp))
{
result = tmp;
return(true);
}
if (setError)
{
string typeString = tmp is null ? "null" : tmp.GetType().ToString();
Exceptions.SetError(Exceptions.TypeError, $"{typeString} value cannot be converted to {obType}");
}
return(false);
case ClassBase cb:
if (!cb.type.Valid)
{
Exceptions.SetError(Exceptions.TypeError, cb.type.DeletedMessage);
return(false);
}
result = cb.type.Value;
return(true);
case null:
break;
default:
throw new ArgumentException("We should never receive instances of other managed types");
}
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.ContainsGenericParameters)
{
if (setError)
{
Exceptions.SetError(Exceptions.TypeError, $"Cannot create an instance of the open generic type {obType}");
}
return(false);
}
if (obType.IsArray)
{
return(ToArray(value, obType, out result, setError));
}
// Conversion to 'Object' is done based on some reasonable default
// conversions (Python string -> managed string).
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.PyFloat_Check(value))
{
return(ToPrimitive(value, doubleType, out result, setError));
}
// give custom codecs a chance to take over conversion of ints and sequences
BorrowedReference pyType = Runtime.PyObject_TYPE(value);
if (PyObjectConversions.TryDecode(value, pyType, obType, out result))
{
return(true);
}
if (Runtime.PyInt_Check(value))
{
result = new PyInt(value);
return(true);
}
if (Runtime.PySequence_Check(value))
{
return(ToArray(value, typeof(object[]), out result, setError));
}
result = new PyObject(value);
return(true);
}
// 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.PyLongType)
{
result = typeof(PyInt);
return(true);
}
if (value == Runtime.PyFloatType)
{
result = doubleType;
return(true);
}
if (value == Runtime.PyListType)
{
result = typeof(PyList);
return(true);
}
if (value == Runtime.PyTupleType)
{
result = typeof(PyTuple);
return(true);
}
if (setError)
{
Exceptions.SetError(Exceptions.TypeError, "value cannot be converted to Type");
}
return(false);
}
if (DecodableByUser(obType))
{
BorrowedReference pyType = Runtime.PyObject_TYPE(value);
if (PyObjectConversions.TryDecode(value, pyType, obType, out result))
{
return(true);
}
}
return(ToPrimitive(value, obType, out result, setError));
}