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pythonnet/src/runtime/Py.cs at v3.2.0-rc2 · pythonnet/pythonnet · GitHub
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namespace
Python
.
Runtime
;
using
System
;
using
System
.
Collections
.
Generic
;
using
System
.
Linq
;
using
System
.
Runtime
.
Serialization
;
using
System
.
Threading
;
using
Python
.
Runtime
.
Native
;
public
static
class
Py
{
public
static
GILState
GIL
(
)
=>
PythonEngine
.
DebugGIL
?
new
DebugGILState
(
)
:
new
GILState
(
)
;
public
static
PyModule
CreateScope
(
)
=>
new
(
)
;
public
static
PyModule
CreateScope
(
string
name
)
=>
new
(
name
??
throw
new
ArgumentNullException
(
nameof
(
name
)
)
)
;
public
class
GILState
:
IDisposable
{
private
readonly
PyGILState
state
;
private
bool
isDisposed
;
internal
GILState
(
)
{
state
=
PythonEngine
.
AcquireLock
(
)
;
}
public
virtual
void
Dispose
(
)
{
if
(
this
.
isDisposed
)
return
;
PythonEngine
.
ReleaseLock
(
state
)
;
GC
.
SuppressFinalize
(
this
)
;
this
.
isDisposed
=
true
;
}
~
GILState
(
)
{
throw
new
InvalidOperationException
(
"GIL must always be released, and it must be released from the same thread that acquired it."
)
;
}
}
public
class
DebugGILState
:
GILState
{
readonly
Thread
owner
;
internal
DebugGILState
(
)
:
base
(
)
{
this
.
owner
=
Thread
.
CurrentThread
;
}
public
override
void
Dispose
(
)
{
if
(
this
.
owner
!=
Thread
.
CurrentThread
)
throw
new
InvalidOperationException
(
"GIL must always be released from the same thread, that acquired it"
)
;
base
.
Dispose
(
)
;
}
}
public
class
KeywordArguments
:
PyDict
{
public
KeywordArguments
(
)
:
base
(
)
{
}
protected
KeywordArguments
(
SerializationInfo
info
,
StreamingContext
context
)
:
base
(
info
,
context
)
{
}
}
public
static
KeywordArguments
kw
(
params
object
?
[
]
kv
)
{
var
dict
=
new
KeywordArguments
(
)
;
if
(
kv
.
Length
%
2
!=
0
)
{
throw
new
ArgumentException
(
"Must have an equal number of keys and values"
)
;
}
for
(
var
i
=
0
;
i
<
kv
.
Length
;
i
+=
2
)
{
if
(
kv
[
i
]
is
not
string
key
)
throw
new
ArgumentException
(
"Keys must be non-null strings"
)
;
BorrowedReference
value
;
NewReference
temp
=
default
;
if
(
kv
[
i
+
1
]
is
PyObject
pyObj
)
{
value
=
pyObj
;
}
else
{
temp
=
Converter
.
ToPythonDetectType
(
kv
[
i
+
1
]
)
;
value
=
temp
.
Borrow
(
)
;
}
using
(
temp
)
{
if
(
Runtime
.
PyDict_SetItemString
(
dict
,
key
,
value
)
!=
0
)
{
throw
new
ArgumentException
(
string
.
Format
(
"Cannot add key '{0}' to dictionary."
,
key
)
,
innerException
:
PythonException
.
FetchCurrent
(
)
)
;
}
}
}
return
dict
;
}
/// <summary>
/// Given a module or package name, import the module and return the resulting object.
/// </summary>
/// <param name="name">Fully-qualified module or package name</param>
public
static
PyObject
Import
(
string
name
)
=>
PyModule
.
Import
(
name
)
;
public
static
void
SetArgv
(
)
{
IEnumerable
<
string
>
args
;
try
{
args
=
Environment
.
GetCommandLineArgs
(
)
;
}
catch
(
NotSupportedException
)
{
args
=
Enumerable
.
Empty
<
string
>
(
)
;
}
SetArgv
(
new
[
]
{
""
}
.
Concat
(
args
.
Skip
(
1
)
)
)
;
}
public
static
void
SetArgv
(
params
string
[
]
argv
)
{
SetArgv
(
argv
as
IEnumerable
<
string
>
)
;
}
public
static
void
SetArgv
(
IEnumerable
<
string
>
argv
)
{
if
(
argv
is
null
)
throw
new
ArgumentNullException
(
nameof
(
argv
)
)
;
using
(
GIL
(
)
)
{
string
[
]
arr
=
argv
.
ToArray
(
)
;
Runtime
.
PySys_SetArgvEx
(
arr
.
Length
,
arr
,
0
)
;
Runtime
.
CheckExceptionOccurred
(
)
;
}
}
public
static
void
With
(
PyObject
obj
,
Action
<
PyObject
>
Body
)
{
if
(
obj
is
null
)
throw
new
ArgumentNullException
(
nameof
(
obj
)
)
;
if
(
Body
is
null
)
throw
new
ArgumentNullException
(
nameof
(
Body
)
)
;
// Behavior described here:
// https://docs.python.org/2/reference/datamodel.html#with-statement-context-managers
Exception
?
ex
=
null
;
PythonException
?
pyError
=
null
;
try
{
PyObject
enterResult
=
obj
.
InvokeMethod
(
"__enter__"
)
;
Body
(
enterResult
)
;
}
catch
(
PythonException
e
)
{
ex
=
pyError
=
e
;
}
catch
(
Exception
e
)
{
ex
=
e
;
Exceptions
.
SetError
(
e
)
;
pyError
=
PythonException
.
FetchCurrentRaw
(
)
;
}
PyObject
type
=
pyError
?
.
Type
??
PyObject
.
None
;
PyObject
val
=
pyError
?
.
Value
??
PyObject
.
None
;
PyObject
traceBack
=
pyError
?
.
Traceback
??
PyObject
.
None
;
var
exitResult
=
obj
.
InvokeMethod
(
"__exit__"
,
type
,
val
,
traceBack
)
;
if
(
ex
!=
null
&&
!
exitResult
.
IsTrue
(
)
)
throw
ex
;
}
public
static
void
With
(
PyObject
obj
,
Action
<
dynamic
>
Body
)
=>
With
(
obj
,
(
PyObject
context
)
=>
Body
(
context
)
)
;
}
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