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pythonnet/src/runtime/pylist.cs at python3.9 · sdpython/pythonnet · GitHub
This repository was archived by the owner on Jul 22, 2023. It is now read-only.
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runtime
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pylist.cs
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using
System
;
namespace
Python
.
Runtime
{
/// <summary>
/// Represents a standard Python list object. See the documentation at
/// PY2: https://docs.python.org/2/c-api/list.html
/// PY3: https://docs.python.org/3/c-api/list.html
/// for details.
/// </summary>
public
class
PyList
:
PySequence
{
/// <summary>
/// PyList Constructor
/// </summary>
/// <remarks>
/// Creates a new PyList from an existing object reference. Note
/// that the instance assumes ownership of the object reference.
/// The object reference is not checked for type-correctness.
/// </remarks>
public
PyList
(
IntPtr
ptr
)
:
base
(
ptr
)
{
}
/// <summary>
/// Creates new <see cref="PyList"/> pointing to the same object, as the given reference.
/// </summary>
internal
PyList
(
BorrowedReference
reference
)
:
base
(
reference
)
{
}
private
static
IntPtr
FromObject
(
PyObject
o
)
{
if
(
o
==
null
||
!
IsListType
(
o
)
)
{
throw
new
ArgumentException
(
"object is not a list"
)
;
}
Runtime
.
XIncref
(
o
.
obj
)
;
return
o
.
obj
;
}
/// <summary>
/// PyList Constructor
/// </summary>
/// <remarks>
/// Copy constructor - obtain a PyList from a generic PyObject. An
/// ArgumentException will be thrown if the given object is not a
/// Python list object.
/// </remarks>
public
PyList
(
PyObject
o
)
:
base
(
FromObject
(
o
)
)
{
}
/// <summary>
/// PyList Constructor
/// </summary>
/// <remarks>
/// Creates a new empty Python list object.
/// </remarks>
public
PyList
(
)
:
base
(
Runtime
.
PyList_New
(
0
)
)
{
if
(
obj
==
IntPtr
.
Zero
)
{
throw
new
PythonException
(
)
;
}
}
private
static
IntPtr
FromArray
(
PyObject
[
]
items
)
{
int
count
=
items
.
Length
;
IntPtr
val
=
Runtime
.
PyList_New
(
count
)
;
for
(
var
i
=
0
;
i
<
count
;
i
++
)
{
IntPtr
ptr
=
items
[
i
]
.
obj
;
Runtime
.
XIncref
(
ptr
)
;
int
r
=
Runtime
.
PyList_SetItem
(
val
,
i
,
ptr
)
;
if
(
r
<
0
)
{
Runtime
.
Py_DecRef
(
val
)
;
throw
new
PythonException
(
)
;
}
}
return
val
;
}
/// <summary>
/// PyList Constructor
/// </summary>
/// <remarks>
/// Creates a new Python list object from an array of PyObjects.
/// </remarks>
public
PyList
(
PyObject
[
]
items
)
:
base
(
FromArray
(
items
)
)
{
}
/// <summary>
/// IsListType Method
/// </summary>
/// <remarks>
/// Returns true if the given object is a Python list.
/// </remarks>
public
static
bool
IsListType
(
PyObject
value
)
{
return
Runtime
.
PyList_Check
(
value
.
obj
)
;
}
/// <summary>
/// AsList Method
/// </summary>
/// <remarks>
/// Converts a Python object to a Python list if possible, raising
/// a PythonException if the conversion is not possible. This is
/// equivalent to the Python expression "list(object)".
/// </remarks>
public
static
PyList
AsList
(
PyObject
value
)
{
IntPtr
op
=
Runtime
.
PySequence_List
(
value
.
obj
)
;
if
(
op
==
IntPtr
.
Zero
)
{
throw
new
PythonException
(
)
;
}
return
new
PyList
(
op
)
;
}
/// <summary>
/// Append Method
/// </summary>
/// <remarks>
/// Append an item to the list object.
/// </remarks>
public
void
Append
(
PyObject
item
)
{
int
r
=
Runtime
.
PyList_Append
(
this
.
Reference
,
item
.
obj
)
;
if
(
r
<
0
)
{
throw
new
PythonException
(
)
;
}
}
/// <summary>
/// Insert Method
/// </summary>
/// <remarks>
/// Insert an item in the list object at the given index.
/// </remarks>
public
void
Insert
(
int
index
,
PyObject
item
)
{
int
r
=
Runtime
.
PyList_Insert
(
this
.
Reference
,
index
,
item
.
obj
)
;
if
(
r
<
0
)
{
throw
new
PythonException
(
)
;
}
}
/// <summary>
/// Reverse Method
/// </summary>
/// <remarks>
/// Reverse the order of the list object in place.
/// </remarks>
public
void
Reverse
(
)
{
int
r
=
Runtime
.
PyList_Reverse
(
this
.
Reference
)
;
if
(
r
<
0
)
{
throw
new
PythonException
(
)
;
}
}
/// <summary>
/// Sort Method
/// </summary>
/// <remarks>
/// Sort the list in place.
/// </remarks>
public
void
Sort
(
)
{
int
r
=
Runtime
.
PyList_Sort
(
this
.
Reference
)
;
if
(
r
<
0
)
{
throw
new
PythonException
(
)
;
}
}
}
}
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