Repository navigation
Expand file tree
/
Copy pathpyscope.cs
More file actions
696 lines (642 loc) · 19.9 KB
/
Copy pathpyscope.cs
File metadata and controls
696 lines (642 loc) · 19.9 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
using System;
using System.Linq;
using System.Collections.Generic;
using System.Dynamic;
namespace Python.Runtime
{
public class PyScopeException : Exception
{
public PyScopeException(string message)
: base(message)
{
}
}
/// <summary>
/// Classes/methods have this attribute must be used with GIL obtained.
/// </summary>
public class PyGILAttribute : Attribute
{
}
[PyGIL]
public class PyScope : DynamicObject, IDisposable
{
private readonly PyReferenceDecrementer _referenceDecrementer;
public readonly string Name;
/// <summary>
/// the python Module object the scope associated with.
/// </summary>
internal IntPtr obj;
/// <summary>
/// the variable dict of the scope.
/// </summary>
internal readonly IntPtr variables;
private bool _isDisposed;
/// <summary>
/// The Manager this scope associated with.
/// It provides scopes this scope can import.
/// </summary>
internal readonly PyScopeManager Manager;
/// <summary>
/// event which will be triggered after the scope disposed.
/// </summary>
public event Action<PyScope> OnDispose;
/// <summary>
/// Constructor
/// </summary>
/// <remarks>
/// Create a scope based on a Python Module.
/// </remarks>
internal PyScope(IntPtr ptr, PyScopeManager manager)
{
_referenceDecrementer = PythonEngine.CurrentRefDecrementer;
if (!Runtime.PyType_IsSubtype(Runtime.PyObject_TYPE(ptr), Runtime.PyModuleType))
{
throw new PyScopeException("object is not a module");
}
Manager = manager ?? PyScopeManager.Global;
obj = ptr;
//Refcount of the variables not increase
variables = Runtime.PyModule_GetDict(obj);
Runtime.CheckExceptionOccurred();
Runtime.PyDict_SetItemString(
variables, "__builtins__",
Runtime.PyEval_GetBuiltins()
);
this.Name = this.Get<string>("__name__");
}
/// <summary>
/// return the variable dict of the scope.
/// </summary>
/// <returns></returns>
public PyDict Variables()
{
Runtime.XIncref(variables);
return new PyDict(variables);
}
/// <summary>
/// Create a scope, and import all from this scope
/// </summary>
/// <returns></returns>
public PyScope NewScope()
{
var scope = Manager.Create();
scope.ImportAll(this);
return scope;
}
/// <summary>
/// Import method
/// </summary>
/// <remarks>
/// Import a scope or a module of given name,
/// scope will be looked up first.
/// </remarks>
public dynamic Import(string name, string asname = null)
{
Check();
if (String.IsNullOrEmpty(asname))
{
asname = name;
}
PyScope scope;
Manager.TryGet(name, out scope);
if (scope != null)
{
Import(scope, asname);
return scope;
}
else
{
PyObject module = PythonEngine.ImportModule(name);
Import(module, asname);
return module;
}
}
/// <summary>
/// Import method
/// </summary>
/// <remarks>
/// Import a scope as a variable of given name.
/// </remarks>
public void Import(PyScope scope, string asname)
{
this.Set(asname, scope.obj);
}
/// <summary>
/// Import Method
/// </summary>
/// <remarks>
/// The 'import .. as ..' statement in Python.
/// Import a module as a variable into the scope.
/// </remarks>
public void Import(PyObject module, string asname = null)
{
if (String.IsNullOrEmpty(asname))
{
asname = module.GetAttr("__name__").As<string>();
}
Set(asname, module);
}
/// <summary>
/// ImportAll Method
/// </summary>
/// <remarks>
/// The 'import * from ..' statement in Python.
/// Import all content of a scope/module of given name into the scope, scope will be looked up first.
/// </remarks>
public void ImportAll(string name)
{
PyScope scope;
Manager.TryGet(name, out scope);
if (scope != null)
{
ImportAll(scope);
return;
}
else
{
PyObject module = PythonEngine.ImportModule(name);
ImportAll(module);
}
}
/// <summary>
/// ImportAll Method
/// </summary>
/// <remarks>
/// Import all variables of the scope into this scope.
/// </remarks>
public void ImportAll(PyScope scope)
{
int result = Runtime.PyDict_Update(variables, scope.variables);
if (result < 0)
{
throw new PythonException();
}
}
/// <summary>
/// ImportAll Method
/// </summary>
/// <remarks>
/// Import all variables of the module into this scope.
/// </remarks>
public void ImportAll(PyObject module)
{
if (Runtime.PyObject_Type(module.obj) != Runtime.PyModuleType)
{
throw new PyScopeException("object is not a module");
}
var module_dict = Runtime.PyModule_GetDict(module.obj);
int result = Runtime.PyDict_Update(variables, module_dict);
if (result < 0)
{
throw new PythonException();
}
}
/// <summary>
/// ImportAll Method
/// </summary>
/// <remarks>
/// Import all variables in the dictionary into this scope.
/// </remarks>
public void ImportAll(PyDict dict)
{
int result = Runtime.PyDict_Update(variables, dict.obj);
if (result < 0)
{
throw new PythonException();
}
}
/// <summary>
/// Execute method
/// </summary>
/// <remarks>
/// Execute a Python ast and return the result as a PyObject.
/// The ast can be either an expression or stmts.
/// </remarks>
public PyObject Execute(PyObject script, PyDict locals = null)
{
Check();
IntPtr _locals = locals == null ? variables : locals.obj;
IntPtr ptr = Runtime.PyEval_EvalCode(script.Handle, variables, _locals);
Runtime.CheckExceptionOccurred();
if (ptr == Runtime.PyNone)
{
Runtime.XDecref(ptr);
return null;
}
return new PyObject(ptr);
}
/// <summary>
/// Execute method
/// </summary>
/// <remarks>
/// Execute a Python ast and return the result as a PyObject,
/// and convert the result to a Managed Object of given type.
/// The ast can be either an expression or stmts.
/// </remarks>
public T Execute<T>(PyObject script, PyDict locals = null)
{
Check();
PyObject pyObj = Execute(script, locals);
if (pyObj == null)
{
return default(T);
}
var obj = pyObj.As<T>();
return obj;
}
/// <summary>
/// Eval method
/// </summary>
/// <remarks>
/// Evaluate a Python expression and return the result as a PyObject
/// or null if an exception is raised.
/// </remarks>
public PyObject Eval(string code, PyDict locals = null)
{
Check();
IntPtr _locals = locals == null ? variables : locals.obj;
var flag = (IntPtr)Runtime.Py_eval_input;
IntPtr ptr = Runtime.PyRun_String(
code, flag, variables, _locals
);
Runtime.CheckExceptionOccurred();
return new PyObject(ptr);
}
/// <summary>
/// Evaluate a Python expression
/// </summary>
/// <remarks>
/// Evaluate a Python expression
/// and convert the result to a Managed Object of given type.
/// </remarks>
public T Eval<T>(string code, PyDict locals = null)
{
Check();
PyObject pyObj = Eval(code, locals);
var obj = pyObj.As<T>();
return obj;
}
/// <summary>
/// Exec Method
/// </summary>
/// <remarks>
/// Exec a Python script and save its local variables in the current local variable dict.
/// </remarks>
public void Exec(string code, PyDict locals = null)
{
Check();
IntPtr _locals = locals == null ? variables : locals.obj;
Exec(code, variables, _locals);
}
private void Exec(string code, IntPtr _globals, IntPtr _locals)
{
var flag = (IntPtr)Runtime.Py_file_input;
IntPtr ptr = Runtime.PyRun_String(
code, flag, _globals, _locals
);
Runtime.CheckExceptionOccurred();
if (ptr != Runtime.PyNone)
{
throw new PythonException();
}
Runtime.XDecref(ptr);
}
/// <summary>
/// Set Variable Method
/// </summary>
/// <remarks>
/// Add a new variable to the variables dict if it not exist
/// or update its value if the variable exists.
/// </remarks>
public void Set(string name, object value)
{
IntPtr _value = Converter.ToPython(value, value?.GetType());
Set(name, _value);
Runtime.XDecref(_value);
}
private void Set(string name, IntPtr value)
{
Check();
using (var pyKey = new PyString(name))
{
int r = Runtime.PyObject_SetItem(variables, pyKey.obj, value);
if (r < 0)
{
throw new PythonException();
}
}
}
/// <summary>
/// Remove Method
/// </summary>
/// <remarks>
/// Remove a variable from the variables dict.
/// </remarks>
public void Remove(string name)
{
Check();
using (var pyKey = new PyString(name))
{
int r = Runtime.PyObject_DelItem(variables, pyKey.obj);
if (r < 0)
{
throw new PythonException();
}
}
}
/// <summary>
/// Contains Method
/// </summary>
/// <remarks>
/// Returns true if the variable exists in the scope.
/// </remarks>
public bool Contains(string name)
{
Check();
using (var pyKey = new PyString(name))
{
return Runtime.PyMapping_HasKey(variables, pyKey.obj) != 0;
}
}
/// <summary>
/// Get Method
/// </summary>
/// <remarks>
/// Returns the value of the variable of given name.
/// If the variable does not exist, throw an Exception.
/// </remarks>
public PyObject Get(string name)
{
PyObject scope;
var state = TryGet(name, out scope);
if (!state)
{
throw new PyScopeException($"The scope of name '{Name}' has no attribute '{name}'");
}
return scope;
}
/// <summary>
/// TryGet Method
/// </summary>
/// <remarks>
/// Returns the value of the variable, local variable first.
/// If the variable does not exist, return null.
/// </remarks>
public bool TryGet(string name, out PyObject value)
{
Check();
using (var pyKey = new PyString(name))
{
if (Runtime.PyMapping_HasKey(variables, pyKey.obj) != 0)
{
IntPtr op = Runtime.PyObject_GetItem(variables, pyKey.obj);
if (op == IntPtr.Zero)
{
throw new PythonException();
}
if (op == Runtime.PyNone)
{
Runtime.XDecref(op);
value = null;
return true;
}
value = new PyObject(op);
return true;
}
else
{
value = null;
return false;
}
}
}
/// <summary>
/// Get Method
/// </summary>
/// <remarks>
/// Obtain the value of the variable of given name,
/// and convert the result to a Managed Object of given type.
/// If the variable does not exist, throw an Exception.
/// </remarks>
public T Get<T>(string name)
{
Check();
PyObject pyObj = Get(name);
if (pyObj == null)
{
return default(T);
}
return pyObj.As<T>();
}
/// <summary>
/// TryGet Method
/// </summary>
/// <remarks>
/// Obtain the value of the variable of given name,
/// and convert the result to a Managed Object of given type.
/// If the variable does not exist, return false.
/// </remarks>
public bool TryGet<T>(string name, out T value)
{
Check();
PyObject pyObj;
var result = TryGet(name, out pyObj);
if (!result)
{
value = default(T);
return false;
}
if (pyObj == null)
{
if (typeof(T).IsValueType)
{
throw new PyScopeException($"The value of the attribute '{name}' is None which cannot be convert to '{typeof(T).ToString()}'");
}
else
{
value = default(T);
return true;
}
}
value = pyObj.As<T>();
return true;
}
public override bool TryGetMember(GetMemberBinder binder, out object result)
{
result = this.Get(binder.Name);
return true;
}
public override bool TrySetMember(SetMemberBinder binder, object value)
{
this.Set(binder.Name, value);
return true;
}
private void Check()
{
if (_isDisposed)
{
throw new PyScopeException($"The scope of name '{Name}' object has been disposed");
}
}
protected virtual void Dispose(bool disposing)
{
if (!_isDisposed)
{
IntPtr objToDispose = obj;
if (disposing)
{
try
{
OnDispose?.Invoke(this);
}
finally
{
_isDisposed = true;
obj = IntPtr.Zero;
}
if (Runtime.Py_IsInitialized() > 0 && !Runtime.IsFinalizing)
{
IntPtr gs = PythonEngine.AcquireLock();
try
{
Runtime.XDecref(objToDispose);
}
finally
{
PythonEngine.ReleaseLock(gs);
}
}
}
else
{
_isDisposed = true;
obj = IntPtr.Zero;
_referenceDecrementer?.ScheduleDecRef(objToDispose);
}
}
}
public void Dispose()
{
GC.SuppressFinalize(this);
Dispose(true);
}
~PyScope()
{
Dispose(false);
}
}
public class PyScopeManager
{
public static PyScopeManager Global;
private Dictionary<string, PyScope> NamedScopes = new Dictionary<string, PyScope>();
internal static void Reset()
{
Global = new PyScopeManager();
}
internal PyScope NewScope(string name)
{
if (name == null)
{
name = "";
}
var module = Runtime.PyModule_New(name);
if (module == IntPtr.Zero)
{
throw new PythonException();
}
return new PyScope(module, this);
}
/// <summary>
/// Create Method
/// </summary>
/// <remarks>
/// Create an anonymous scope.
/// </remarks>
[PyGIL]
public PyScope Create()
{
var scope = this.NewScope(null);
return scope;
}
/// <summary>
/// Create Method
/// </summary>
/// <remarks>
/// Create an named scope of given name.
/// </remarks>
[PyGIL]
public PyScope Create(string name)
{
if (String.IsNullOrEmpty(name))
{
throw new ArgumentNullException(nameof(name));
}
if (name != null && Contains(name))
{
throw new PyScopeException($"A scope of name '{name}' does already exist");
}
var scope = this.NewScope(name);
scope.OnDispose += Remove;
NamedScopes[name] = scope;
return scope;
}
/// <summary>
/// Contains Method
/// </summary>
/// <remarks>
/// return true if the scope exists in this manager.
/// </remarks>
public bool Contains(string name)
{
return NamedScopes.ContainsKey(name);
}
/// <summary>
/// Get Method
/// </summary>
/// <remarks>
/// Find the scope in this manager.
/// If the scope not exist, an Exception will be thrown.
/// </remarks>
public PyScope Get(string name)
{
if (String.IsNullOrEmpty(name))
{
throw new ArgumentNullException(nameof(name));
}
if (NamedScopes.ContainsKey(name))
{
return NamedScopes[name];
}
throw new PyScopeException($"There is no scope named '{name}' registered in this manager");
}
/// <summary>
/// Get Method
/// </summary>
/// <remarks>
/// Try to find the scope in this manager.
/// </remarks>
public bool TryGet(string name, out PyScope scope)
{
return NamedScopes.TryGetValue(name, out scope);
}
/// <summary>
/// Remove Method
/// </summary>
/// <remarks>
/// remove the scope from this manager.
/// </remarks>
public void Remove(PyScope scope)
{
NamedScopes.Remove(scope.Name);
}
[PyGIL]
public void Clear()
{
var scopes = NamedScopes.Values.ToList();
foreach (var scope in scopes)
{
scope.Dispose();
}
}
}
}