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using
System
;
using
System
.
Collections
;
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>
public
class
PySequence
:
PyObject
,
IEnumerable
{
protected
PySequence
(
IntPtr
ptr
)
:
base
(
ptr
)
{
}
protected
PySequence
(
)
{
}
/// <summary>
/// IsSequenceType Method
/// </summary>
/// <remarks>
/// Returns true if the given object implements the sequence protocol.
/// </remarks>
public
static
bool
IsSequenceType
(
PyObject
value
)
{
return
Runtime
.
PySequence_Check
(
value
.
obj
)
;
}
/// <summary>
/// GetSlice Method
/// </summary>
/// <remarks>
/// Return the slice of the sequence with the given indices.
/// </remarks>
public
PyObject
GetSlice
(
int
i1
,
int
i2
)
{
IntPtr
op
=
Runtime
.
PySequence_GetSlice
(
obj
,
i1
,
i2
)
;
if
(
op
==
IntPtr
.
Zero
)
{
throw
new
PythonException
(
)
;
}
return
new
PyObject
(
op
)
;
}
/// <summary>
/// SetSlice Method
/// </summary>
/// <remarks>
/// Sets the slice of the sequence with the given indices.
/// </remarks>
public
void
SetSlice
(
int
i1
,
int
i2
,
PyObject
v
)
{
int
r
=
Runtime
.
PySequence_SetSlice
(
obj
,
i1
,
i2
,
v
.
obj
)
;
if
(
r
<
0
)
{
throw
new
PythonException
(
)
;
}
}
/// <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
new
PythonException
(
)
;
}
}
/// <summary>
/// Index Method
/// </summary>
/// <remarks>
/// Return the index of the given item in the sequence, or -1 if
/// the item does not appear in the sequence.
/// </remarks>
public
int
Index
(
PyObject
item
)
{
int
r
=
Runtime
.
PySequence_Index
(
obj
,
item
.
obj
)
;
if
(
r
<
0
)
{
Runtime
.
PyErr_Clear
(
)
;
return
-
1
;
}
return
r
;
}
/// <summary>
/// Contains Method
/// </summary>
/// <remarks>
/// Return true if the sequence contains the given item. This method
/// throws a PythonException if an error occurs during the check.
/// </remarks>
public
bool
Contains
(
PyObject
item
)
{
int
r
=
Runtime
.
PySequence_Contains
(
obj
,
item
.
obj
)
;
if
(
r
<
0
)
{
throw
new
PythonException
(
)
;
}
return
r
!=
0
;
}
/// <summary>
/// Concat Method
/// </summary>
/// <remarks>
/// Return the concatenation of the sequence object with the passed in
/// sequence object.
/// </remarks>
public
PyObject
Concat
(
PyObject
other
)
{
IntPtr
op
=
Runtime
.
PySequence_Concat
(
obj
,
other
.
obj
)
;
if
(
op
==
IntPtr
.
Zero
)
{
throw
new
PythonException
(
)
;
}
return
new
PyObject
(
op
)
;
}
/// <summary>
/// Repeat Method
/// </summary>
/// <remarks>
/// Return the sequence object repeated N times. This is equivalent
/// to the Python expression "object * count".
/// </remarks>
public
PyObject
Repeat
(
int
count
)
{
IntPtr
op
=
Runtime
.
PySequence_Repeat
(
obj
,
count
)
;
if
(
op
==
IntPtr
.
Zero
)
{
throw
new
PythonException
(
)
;
}
return
new
PyObject
(
op
)
;
}
}
}
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