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using
System
;
namespace
Python
.
Runtime
{
/// <summary>
/// Represents a Python tuple object. See the documentation at
/// PY2: https://docs.python.org/2/c-api/tupleObjects.html
/// PY3: https://docs.python.org/3/c-api/tupleObjects.html
/// for details.
/// </summary>
public
class
PyTuple
:
PySequence
{
/// <summary>
/// PyTuple Constructor
/// </summary>
/// <remarks>
/// Creates a new PyTuple 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
PyTuple
(
IntPtr
ptr
)
:
base
(
ptr
)
{
}
/// <summary>
/// PyTuple Constructor
/// </summary>
/// <remarks>
/// Creates a new PyTuple from an existing object reference.
/// The object reference is not checked for type-correctness.
/// </remarks>
internal
PyTuple
(
BorrowedReference
reference
)
:
base
(
reference
)
{
}
private
static
IntPtr
FromObject
(
PyObject
o
)
{
if
(
o
==
null
||
!
IsTupleType
(
o
)
)
{
throw
new
ArgumentException
(
"object is not a tuple"
)
;
}
Runtime
.
XIncref
(
o
.
obj
)
;
return
o
.
obj
;
}
/// <summary>
/// PyTuple Constructor
/// </summary>
/// <remarks>
/// Copy constructor - obtain a PyTuple from a generic PyObject. An
/// ArgumentException will be thrown if the given object is not a
/// Python tuple object.
/// </remarks>
public
PyTuple
(
PyObject
o
)
:
base
(
FromObject
(
o
)
)
{
}
/// <summary>
/// PyTuple Constructor
/// </summary>
/// <remarks>
/// Creates a new empty PyTuple.
/// </remarks>
public
PyTuple
(
)
:
base
(
Runtime
.
PyTuple_New
(
0
)
)
{
PythonException
.
ThrowIfIsNull
(
obj
)
;
}
private
static
IntPtr
FromArray
(
PyObject
[
]
items
)
{
int
count
=
items
.
Length
;
IntPtr
val
=
Runtime
.
PyTuple_New
(
count
)
;
for
(
var
i
=
0
;
i
<
count
;
i
++
)
{
IntPtr
ptr
=
items
[
i
]
.
obj
;
Runtime
.
XIncref
(
ptr
)
;
int
res
=
Runtime
.
PyTuple_SetItem
(
val
,
i
,
ptr
)
;
if
(
res
!=
0
)
{
Runtime
.
Py_DecRef
(
val
)
;
throw
new
PythonException
(
)
;
}
}
return
val
;
}
/// <summary>
/// PyTuple Constructor
/// </summary>
/// <remarks>
/// Creates a new PyTuple from an array of PyObject instances.
/// <para />
/// See caveats about PyTuple_SetItem:
/// https://www.coursehero.com/file/p4j2ogg/important-exceptions-to-this-rule-PyTupleSetItem-and-PyListSetItem-These/
/// </remarks>
public
PyTuple
(
PyObject
[
]
items
)
:
base
(
FromArray
(
items
)
)
{
}
/// <summary>
/// IsTupleType Method
/// </summary>
/// <remarks>
/// Returns true if the given object is a Python tuple.
/// </remarks>
public
static
bool
IsTupleType
(
PyObject
value
)
{
return
Runtime
.
PyTuple_Check
(
value
.
obj
)
;
}
/// <summary>
/// AsTuple Method
/// </summary>
/// <remarks>
/// Convert a Python object to a Python tuple if possible, raising
/// a PythonException if the conversion is not possible. This is
/// equivalent to the Python expression "tuple(object)".
/// </remarks>
public
static
PyTuple
AsTuple
(
PyObject
value
)
{
IntPtr
op
=
Runtime
.
PySequence_Tuple
(
value
.
obj
)
;
PythonException
.
ThrowIfIsNull
(
op
)
;
return
new
PyTuple
(
op
)
;
}
}
}
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