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pythonnet/src/runtime/PythonTypes/PySequence.cs at v3.2.0-rc2 · pythonnet/pythonnet · GitHub
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pythonnet
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src
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runtime
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PythonTypes
/
PySequence.cs
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pythonnet
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runtime
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PythonTypes
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PySequence.cs
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using
System
;
using
System
.
Runtime
.
Serialization
;
namespace
Python
.
Runtime
{
/// <summary>
/// Represents a generic Python sequence. The methods of this class are
/// equivalent to the Python "abstract sequence API". See
/// PY2: https://docs.python.org/2/c-api/sequence.html
/// PY3: https://docs.python.org/3/c-api/sequence.html
/// for details.
/// </summary>
[
Serializable
]
public
class
PySequence
:
PyIterable
{
internal
PySequence
(
BorrowedReference
reference
)
:
base
(
reference
)
{
}
internal
PySequence
(
in
StolenReference
reference
)
:
base
(
reference
)
{
}
protected
PySequence
(
SerializationInfo
info
,
StreamingContext
context
)
:
base
(
info
,
context
)
{
}
/// <summary>
/// Creates new instance from an existing object.
/// </summary>
/// <exception cref="ArgumentException"><paramref name="o"/> does not provide sequence protocol</exception>
public
PySequence
(
PyObject
o
)
:
base
(
FromObject
(
o
)
)
{
}
static
BorrowedReference
FromObject
(
PyObject
o
)
{
if
(
o
is
null
)
throw
new
ArgumentNullException
(
nameof
(
o
)
)
;
if
(
!
IsSequenceType
(
o
)
)
throw
new
ArgumentException
(
"object is not a sequence"
)
;
return
o
.
Reference
;
}
/// <summary>
/// Returns <c>true</c> if the given object implements the sequence protocol.
/// </summary>
public
static
bool
IsSequenceType
(
PyObject
value
)
{
if
(
value
is
null
)
throw
new
ArgumentNullException
(
nameof
(
value
)
)
;
return
Runtime
.
PySequence_Check
(
value
.
obj
)
;
}
/// <summary>
/// Return the slice of the sequence with the given indices.
/// </summary>
public
PyObject
GetSlice
(
int
i1
,
int
i2
)
{
using
var
op
=
Runtime
.
PySequence_GetSlice
(
obj
,
i1
,
i2
)
;
PythonException
.
ThrowIfIsNull
(
op
)
;
return
op
.
MoveToPyObject
(
)
;
}
/// <summary>
/// Sets the slice of the sequence with the given indices.
/// </summary>
public
void
SetSlice
(
int
i1
,
int
i2
,
PyObject
v
)
{
if
(
v
is
null
)
throw
new
ArgumentNullException
(
nameof
(
v
)
)
;
int
r
=
Runtime
.
PySequence_SetSlice
(
obj
,
i1
,
i2
,
v
.
obj
)
;
if
(
r
<
0
)
{
throw
PythonException
.
ThrowLastAsClrException
(
)
;
}
}
/// <summary>
/// DelSlice Method
/// </summary>
/// <remarks>
/// Deletes the slice of the sequence with the given indices.
/// </remarks>
public
void
DelSlice
(
int
i1
,
int
i2
)
{
int
r
=
Runtime
.
PySequence_DelSlice
(
obj
,
i1
,
i2
)
;
if
(
r
<
0
)
{
throw
PythonException
.
ThrowLastAsClrException
(
)
;
}
}
/// <summary>
/// Return the index of the given item in the sequence, or -1 if
/// the item does not appear in the sequence.
/// </summary>
public
nint
Index
(
PyObject
item
)
{
if
(
item
is
null
)
throw
new
ArgumentNullException
(
nameof
(
item
)
)
;
nint
r
=
Runtime
.
PySequence_Index
(
obj
,
item
.
obj
)
;
if
(
r
<
0
)
{
Runtime
.
PyErr_Clear
(
)
;
return
-
1
;
}
return
r
;
}
/// <summary>
/// Return the index of the given item in the sequence, or -1 if
/// the item does not appear in the sequence.
/// </summary>
public
int
Index32
(
PyObject
item
)
=>
checked
(
(
int
)
Index
(
item
)
)
;
/// <summary>
/// Return the index of the given item in the sequence, or -1 if
/// the item does not appear in the sequence.
/// </summary>
public
long
Index64
(
PyObject
item
)
=>
Index
(
item
)
;
/// <summary>
/// Return true if the sequence contains the given item. This method
/// throws a PythonException if an error occurs during the check.
/// </summary>
public
bool
Contains
(
PyObject
item
)
{
if
(
item
is
null
)
throw
new
ArgumentNullException
(
nameof
(
item
)
)
;
int
r
=
Runtime
.
PySequence_Contains
(
obj
,
item
.
obj
)
;
if
(
r
<
0
)
{
throw
PythonException
.
ThrowLastAsClrException
(
)
;
}
return
r
!=
0
;
}
/// <summary>
/// Return the concatenation of the sequence object with the passed in
/// sequence object.
/// </summary>
public
PyObject
Concat
(
PyObject
other
)
{
if
(
other
is
null
)
throw
new
ArgumentNullException
(
nameof
(
other
)
)
;
using
var
op
=
Runtime
.
PySequence_Concat
(
obj
,
other
.
obj
)
;
PythonException
.
ThrowIfIsNull
(
op
)
;
return
op
.
MoveToPyObject
(
)
;
}
/// <summary>
/// Return the sequence object repeated N times. This is equivalent
/// to the Python expression "object * count".
/// </summary>
public
PyObject
Repeat
(
int
count
)
{
using
var
op
=
Runtime
.
PySequence_Repeat
(
obj
,
count
)
;
PythonException
.
ThrowIfIsNull
(
op
)
;
return
op
.
MoveToPyObject
(
)
;
}
}
}
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