/// <summary>
/// Get a PyObject from a list
/// </summary>
/// <typeparam name="TItem"></typeparam>
/// <param name="value"></param>
/// <returns></returns>
public PyObject From <TItem>(IEnumerable <TItem> value)
{
var result = new PyObject(this, Py.PyList_New(value.Count()), true);
for (var i = 0; i < value.Count(); i++)
{
var pyItem = From(value.ElementAt(i));
if (pyItem == null)
{
return(PyZero);
}
// PyList_SetItem steals a reference, this makes sure we dont free it later
Py.Py_IncRef(pyItem);
if (Py.PyList_SetItem(result, i, pyItem) == -1)
{
return(PyZero);
}
}
return(result);
}
/// <summary>
/// Clear this PyObject (the PyObject must be a List or Dictionary)
/// </summary>
/// <param name="pyType">Force this Python Type</param>
/// <returns></returns>
/// <remarks>
/// For a list attribute, the list is cleared
/// For a Dictionary attribute, the dictionary is cleared
/// </remarks>
public bool Clear(PyType pyType)
{
try
{
switch (pyType)
{
case PyType.ListType:
case PyType.DerivedListType:
return(Py.PyList_SetSlice(this, 0, Size() - 1, PySharp.PyZero) == 0);
case PyType.DictType:
case PyType.DictProxyType:
case PyType.DerivedDictType:
case PyType.DerivedDictProxyType:
return(ToDictionary().All(item => Py.PyDict_DelItem(this, item.Key) == 0));
}
return(false);
}
finally
{
HandlePythonError();
}
}
/// <summary>
/// Get a PyObject from a double
/// </summary>
/// <param name="value"></param>
/// <returns></returns>
public PyObject From(double value)
{
// Note: Caching double's has no use due to rounding errors
return(new PyObject(this, Py.PyFloat_FromDouble(value), true));
}
/// <summary>
/// Set an attribute value
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="attribute"></param>
/// <param name="value"></param>
/// <returns></returns>
public bool SetAttribute <T>(string attribute, T value)
{
var pyValue = PySharp.PyZero;
var oValue = (object)value;
if (value is PyObject)
{
pyValue = (PyObject)oValue;
}
// Only allow type conversions if we have a PySharp object reference
if (_pySharp != null)
{
if (oValue is bool)
{
pyValue = _pySharp.From((bool)oValue);
}
if (oValue is int)
{
pyValue = _pySharp.From((int)oValue);
}
if (oValue is long)
{
pyValue = _pySharp.From((long)oValue);
}
if (oValue is float)
{
pyValue = _pySharp.From((float)oValue);
}
if (oValue is double)
{
pyValue = _pySharp.From((double)oValue);
}
if (oValue is string)
{
pyValue = _pySharp.From((string)oValue);
}
if (oValue is IEnumerable <PyObject> )
{
pyValue = _pySharp.From((IEnumerable <PyObject>)oValue);
}
if (oValue is IEnumerable <int> )
{
pyValue = _pySharp.From((IEnumerable <int>)oValue);
}
if (oValue is IEnumerable <long> )
{
pyValue = _pySharp.From((IEnumerable <long>)oValue);
}
if (oValue is IEnumerable <float> )
{
pyValue = _pySharp.From((IEnumerable <float>)oValue);
}
if (oValue is IEnumerable <double> )
{
pyValue = _pySharp.From((IEnumerable <double>)oValue);
}
if (oValue is IEnumerable <string> )
{
pyValue = _pySharp.From((IEnumerable <string>)oValue);
}
}
try
{
if (IsValid && !pyValue.IsNull)
{
return(Py.PyObject_SetAttrString(this, attribute, pyValue) != -1);
}
return(false);
}
finally
{
HandlePythonError();
}
}
/// <summary>
/// Call this PyObject as a python function
/// </summary>
/// <param name="keywords"></param>
/// <param name="parms"></param>
/// <returns></returns>
public PyObject CallThisWithKeywords(Dictionary <string, object> keywords, params object[] parms)
{
if (!IsValid)
{
return(PySharp.PyZero);
}
if (_pySharp == null)
{
throw new NotImplementedException();
}
var pyKeywords = PySharp.PyZero;
if (keywords != null && keywords.Keys.Any())
{
pyKeywords = new PyObject(_pySharp, Py.PyDict_New(), true);
foreach (var item in keywords)
{
var pyValue = _pySharp.From(item.Value);
if (pyValue == null || pyValue.IsNull)
{
throw new NotImplementedException();
}
Py.PyDict_SetItem(pyKeywords, _pySharp.From(item.Key), pyValue);
}
}
var pyParms = new List <PyObject>();
foreach (var parm in parms)
{
var pyParm = _pySharp.From(parm);
if (pyParm == null || pyParm.IsNull)
{
throw new NotImplementedException();
}
// Fail if any parameter is invalid (PyNone is a valid parameter)
if (pyParm.IsNull)
{
return(PySharp.PyZero);
}
pyParms.Add(pyParm);
}
var format = "(" + string.Join("", pyParms.Select(dummy => "O").ToArray()) + ")";
PyObject pyArgs = null;
if (pyParms.Count == 0)
{
pyArgs = new PyObject(_pySharp, Py.Py_BuildValue(format), true);
}
if (pyParms.Count == 1)
{
pyArgs = new PyObject(_pySharp, Py.Py_BuildValue(format, pyParms[0]), true);
}
if (pyParms.Count == 2)
{
pyArgs = new PyObject(_pySharp, Py.Py_BuildValue(format, pyParms[0], pyParms[1]), true);
}
if (pyParms.Count == 3)
{
pyArgs = new PyObject(_pySharp, Py.Py_BuildValue(format, pyParms[0], pyParms[1], pyParms[2]), true);
}
if (pyParms.Count == 4)
{
pyArgs = new PyObject(_pySharp, Py.Py_BuildValue(format, pyParms[0], pyParms[1], pyParms[2], pyParms[3]), true);
}
if (pyParms.Count == 5)
{
pyArgs = new PyObject(_pySharp, Py.Py_BuildValue(format, pyParms[0], pyParms[1], pyParms[2], pyParms[3], pyParms[4]), true);
}
if (pyParms.Count == 6)
{
pyArgs = new PyObject(_pySharp, Py.Py_BuildValue(format, pyParms[0], pyParms[1], pyParms[2], pyParms[3], pyParms[4], pyParms[5]), true);
}
if (pyParms.Count == 7)
{
pyArgs = new PyObject(_pySharp, Py.Py_BuildValue(format, pyParms[0], pyParms[1], pyParms[2], pyParms[3], pyParms[4], pyParms[5], pyParms[6]), true);
}
if (pyArgs == null)
{
throw new NotImplementedException();
}
return(new PyObject(_pySharp, Py.PyEval_CallObjectWithKeywords(this, pyArgs, pyKeywords), true));
}