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pythonnet/src/runtime/PythonTypes/PyTuple.cs at master · generalloki/pythonnet · GitHub
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runtime
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PythonTypes
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PyTuple.cs
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pythonnet
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src
/
runtime
/
PythonTypes
/
PyTuple.cs
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using
System
;
using
System
.
Linq
;
using
System
.
Runtime
.
Serialization
;
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
{
internal
PyTuple
(
in
StolenReference
reference
)
:
base
(
reference
)
{
}
/// <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
)
{
}
protected
PyTuple
(
SerializationInfo
info
,
StreamingContext
context
)
:
base
(
info
,
context
)
{
}
private
static
BorrowedReference
FromObject
(
PyObject
o
)
{
if
(
o
is
null
)
throw
new
ArgumentNullException
(
nameof
(
o
)
)
;
if
(
!
IsTupleType
(
o
)
)
{
throw
new
ArgumentException
(
"object is not a tuple"
)
;
}
return
o
.
Reference
;
}
/// <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
(
NewEmtpy
(
)
)
{
}
private
static
StolenReference
NewEmtpy
(
)
{
var
ptr
=
Runtime
.
PyTuple_New
(
0
)
;
return
ptr
.
StealOrThrow
(
)
;
}
private
static
StolenReference
FromArray
(
PyObject
[
]
items
)
{
if
(
items
is
null
)
throw
new
ArgumentNullException
(
nameof
(
items
)
)
;
if
(
items
.
Any
(
item
=>
item
is
null
)
)
throw
new
ArgumentException
(
message
:
Util
.
UseNone
,
paramName
:
nameof
(
items
)
)
;
int
count
=
items
.
Length
;
using
var
val
=
Runtime
.
PyTuple_New
(
count
)
;
for
(
var
i
=
0
;
i
<
count
;
i
++
)
{
int
res
=
Runtime
.
PyTuple_SetItem
(
val
.
Borrow
(
)
,
i
,
items
[
i
]
)
;
if
(
res
!=
0
)
{
val
.
Dispose
(
)
;
throw
PythonException
.
ThrowLastAsClrException
(
)
;
}
}
return
val
.
Steal
(
)
;
}
/// <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>
/// Returns <c>true</c> if the given object is a Python tuple.
/// </summary>
public
static
bool
IsTupleType
(
PyObject
value
)
{
if
(
value
is
null
)
throw
new
ArgumentNullException
(
nameof
(
value
)
)
;
return
Runtime
.
PyTuple_Check
(
value
.
obj
)
;
}
/// <summary>
/// Convert a Python object to a Python tuple if possible. This is
/// equivalent to the Python expression "tuple(<paramref name="value"/>)".
/// </summary>
/// <exception cref="PythonException">Raised if the object can not be converted to a tuple.</exception>
public
static
PyTuple
AsTuple
(
PyObject
value
)
{
if
(
value
is
null
)
throw
new
ArgumentNullException
(
nameof
(
value
)
)
;
NewReference
op
=
Runtime
.
PySequence_Tuple
(
value
.
Reference
)
;
PythonException
.
ThrowIfIsNull
(
op
)
;
return
new
PyTuple
(
op
.
Steal
(
)
)
;
}
}
}
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