pythonnet/src/embed_tests/TestPyScope.cs at master · NickSavin/pythonnet · GitHub

Repository navigation

History

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

using System;

using NUnit.Framework;

using Python.Runtime;

namespace Python.EmbeddingTest

{

public class PyScopeTest

{

private PyScope ps;

[SetUp]

public void SetUp()

{

using (Py.GIL())

{

ps = Py.CreateScope("test");

}

[TearDown]

public void Dispose()

{

using (Py.GIL())

{

ps.Dispose();

ps = null;

}

/// <summary>

/// Eval a Python expression and obtain its return value.

/// </summary>

[Test]

public void TestEval()

{

using (Py.GIL())

{

ps.Set("a", 1);

var result = ps.Eval<int>("a + 2");

Assert.AreEqual(3, result);

}

/// <summary>

/// Exec Python statements and obtain the variables created.

/// </summary>

[Test]

public void TestExec()

{

using (Py.GIL())

{

ps.Set("bb", 100); //declare a global variable

ps.Set("cc", 10); //declare a local variable

ps.Exec("aa = bb + cc + 3");

var result = ps.Get<int>("aa");

Assert.AreEqual(113, result);

}

/// <summary>

/// Compile an expression into an ast object;

/// Execute the ast and obtain its return value.

/// </summary>

[Test]

public void TestCompileExpression()

{

using (Py.GIL())

{

ps.Set("bb", 100); //declare a global variable

ps.Set("cc", 10); //declare a local variable

PyObject script = PythonEngine.Compile("bb + cc + 3", "", RunFlagType.Eval);

var result = ps.Execute<int>(script);

Assert.AreEqual(113, result);

}

/// <summary>

/// Compile Python statements into an ast object;

/// Execute the ast;

/// Obtain the local variables created.

/// </summary>

[Test]

public void TestCompileStatements()

{

using (Py.GIL())

{

ps.Set("bb", 100); //declare a global variable

ps.Set("cc", 10); //declare a local variable

PyObject script = PythonEngine.Compile("aa = bb + cc + 3", "", RunFlagType.File);

ps.Execute(script);

var result = ps.Get<int>("aa");

Assert.AreEqual(113, result);

}

/// <summary>

/// Create a function in the scope, then the function can read variables in the scope.

/// It cannot write the variables unless it uses the 'global' keyword.

/// </summary>

[Test]

public void TestScopeFunction()

{

using (Py.GIL())

{

ps.Set("bb", 100);

ps.Set("cc", 10);

ps.Exec(

"def func1():\n" +

" bb = cc + 10\n");

dynamic func1 = ps.Get("func1");

func1(); //call the function, it can be called any times

var result = ps.Get<int>("bb");

Assert.AreEqual(100, result);

ps.Set("bb", 100);

ps.Set("cc", 10);

ps.Exec(

"def func2():\n" +

" global bb\n" +

" bb = cc + 10\n");

dynamic func2 = ps.Get("func2");

func2();

result = ps.Get<int>("bb");

Assert.AreEqual(20, result);

}

/// <summary>

/// Create a class in the scope, the class can read variables in the scope.

/// Its methods can write the variables with the help of 'global' keyword.

/// </summary>

[Test]

public void TestScopeClass()

{

using (Py.GIL())

{

dynamic _ps = ps;

_ps.bb = 100;

ps.Exec(

"class Class1():\n" +

" def __init__(self, value):\n" +

" self.value = value\n" +

" def call(self, arg):\n" +

" return self.value + bb + arg\n" + //use scope variables

" def update(self, arg):\n" +

" global bb\n" +

" bb = self.value + arg\n" //update scope variable

);

dynamic obj1 = _ps.Class1(20);

var result = obj1.call(10).As<int>();

Assert.AreEqual(130, result);

obj1.update(10);

result = ps.Get<int>("bb");

Assert.AreEqual(30, result);

}

/// <summary>

/// Import a python module into the session.

/// Equivalent to the Python "import" statement.

/// </summary>

[Test]

public void TestImportModule()

{

using (Py.GIL())

{

dynamic sys = ps.Import("sys");

Assert.IsTrue(ps.Contains("sys"));

ps.Exec("sys.attr1 = 2");

var value1 = ps.Eval<int>("sys.attr1");

var value2 = sys.attr1.As<int>();

Assert.AreEqual(2, value1);

Assert.AreEqual(2, value2);

//import as

ps.Import("sys", "sys1");

Assert.IsTrue(ps.Contains("sys1"));

}

/// <summary>

/// Create a scope and import variables from a scope,

/// exec Python statements in the scope then discard it.

/// </summary>

[Test]

public void TestImportScope()

{

using (Py.GIL())

{

ps.Set("bb", 100);

ps.Set("cc", 10);

using (var scope = Py.CreateScope())

{

scope.Import(ps, "ps");

scope.Exec("aa = ps.bb + ps.cc + 3");

var result = scope.Get<int>("aa");

Assert.AreEqual(113, result);

}

Assert.IsFalse(ps.Contains("aa"));

}

/// <summary>

/// Create a scope and import variables from a scope,

/// exec Python statements in the scope then discard it.

/// </summary>

[Test]

public void TestImportAllFromScope()

{

using (Py.GIL())

{

ps.Set("bb", 100);

ps.Set("cc", 10);

using (var scope = ps.NewScope())

{

scope.Exec("aa = bb + cc + 3");

var result = scope.Get<int>("aa");

Assert.AreEqual(113, result);

}

Assert.IsFalse(ps.Contains("aa"));

}

/// <summary>

/// Create a scope and import variables from a scope,

/// call the function imported.

/// </summary>

[Test]

public void TestImportScopeFunction()

{

using (Py.GIL())

{

ps.Set("bb", 100);

ps.Set("cc", 10);

ps.Exec(

"def func1():\n" +

" return cc + bb\n");

using (PyScope scope = ps.NewScope())

{

//'func1' is imported from the origion scope

scope.Exec(

"def func2():\n" +

" return func1() - cc - bb\n");

dynamic func2 = scope.Get("func2");

var result1 = func2().As<int>();

Assert.AreEqual(0, result1);

scope.Set("cc", 20);//it has no effect on the globals of 'func1'

var result2 = func2().As<int>();

Assert.AreEqual(-10, result2);

scope.Set("cc", 10); //rollback

ps.Set("cc", 20);

var result3 = func2().As<int>();

Assert.AreEqual(10, result3);

ps.Set("cc", 10); //rollback

}

/// <summary>

/// Import a python module into the session with a new name.

/// Equivalent to the Python "import .. as .." statement.

/// </summary>

[Test]

public void TestImportScopeByName()

{

using (Py.GIL())

{

ps.Set("bb", 100);

using (var scope = Py.CreateScope())

{

scope.ImportAll("test");

//scope.ImportModule("test");

Assert.IsTrue(scope.Contains("bb"));

}

/// <summary>

/// Use the locals() and globals() method just like in python module

/// </summary>

[Test]

public void TestVariables()

{

using (Py.GIL())

{

(ps.Variables() as dynamic)["ee"] = new PyInt(200);

var a0 = ps.Get<int>("ee");

Assert.AreEqual(200, a0);

ps.Exec("locals()['ee'] = 210");

var a1 = ps.Get<int>("ee");

Assert.AreEqual(210, a1);

ps.Exec("globals()['ee'] = 220");

var a2 = ps.Get<int>("ee");

Assert.AreEqual(220, a2);

using (var item = ps.Variables())

{

item["ee"] = new PyInt(230);

}

var a3 = ps.Get<int>("ee");

Assert.AreEqual(230, a3);

}

/// <summary>

/// Share a pyscope by multiple threads.

/// </summary>

[Test]

public void TestThread()

{

//After the proposal here https://github.com/pythonnet/pythonnet/pull/419 complished,

//the BeginAllowThreads statement blow and the last EndAllowThreads statement

//should be removed.

dynamic _ps = ps;

var ts = PythonEngine.BeginAllowThreads();

try

{

using (Py.GIL())

{

_ps.res = 0;

_ps.bb = 100;

_ps.th_cnt = 0;

//add function to the scope

//can be call many times, more efficient than ast

ps.Exec(

"def update():\n" +

" global res, th_cnt\n" +

" res += bb + 1\n" +

" th_cnt += 1\n"

);

}

int th_cnt = 3;

for (int i = 0; i < th_cnt; i++)

{

System.Threading.Thread th = new System.Threading.Thread(() =>

{

using (Py.GIL())

{

//ps.GetVariable<dynamic>("update")(); //call the scope function dynamicly

_ps.update();

}

});

th.Start();

}

//equivalent to Thread.Join, make the main thread join the GIL competition

int cnt = 0;

while (cnt != th_cnt)

{

using (Py.GIL())

{

cnt = ps.Get<int>("th_cnt");

}

System.Threading.Thread.Sleep(10);

}

using (Py.GIL())

{

var result = ps.Get<int>("res");

Assert.AreEqual(101 * th_cnt, result);

}

finally

{

PythonEngine.EndAllowThreads(ts);

}

pythonnet/src/embed_tests/TestPyScope.cs at master · NickSavin/pythonnet · GitHub

Repository navigation

Expand file tree

Breadcrumbs

TestPyScope.cs

Latest commit

History

Breadcrumbs

TestPyScope.cs

File metadata and controls