1

2# -*- coding: utf-8 -*-

3

4 u'''Errors, exceptions, exception formatting and exception chaining.

5

6 Error, exception classes and functions to format PyGeodesy errors, including

7 the setting of I{exception chaining} for Python 3.9+.

8

9 By default, I{exception chaining} is turned I{off}. To enable I{exception

10 chaining}, use command line option C{python -X dev} I{OR} set env variable

11 C{PYTHONDEVMODE=1} or to any non-empty string I{OR} set env variable

12 C{PYGEODESY_EXCEPTION_CHAINING=std} or to any non-empty string.

13'''

14# from pygeodesy.basics import isint, isodd, issubclassof, itemsorted, _xinstanceof, _zip # _MODS

15# from pygeodesy.ellipsoidalBase import CartesianEllipsoidalBase, LatLonEllipsoidalBase # _MODS

16# from pygeodesy import errors # _MODS, _MODS.getattr

17 from pygeodesy.interns import MISSING, NN, _a_, _an_, _and_, _clip_, _COLON_, \

18 _COLONSPACE_, _COMMASPACE_, _datum_, _ellipsoidal_, \

19 _incompatible_, _invalid_, _len_, _not_, _or_, _SPACE_, \

20 _specified_, _UNDER_, _vs_, _with_, _tailof

21 from pygeodesy.lazily import _ALL_LAZY, _ALL_MODS as _MODS, _getenv, _PYTHON_X_DEV

22# from pygeodesy.streprs import Fmt, unstr # _MODS

23# from pygeodesy.vector3dBase import Vector3dBase # _MODS

24

25 from copy import copy as _copy

26

27__all__ = _ALL_LAZY.errors # _ALL_DOCS('_InvalidError', '_IsnotError') _under

28__version__ = '24.04.18'

29

30_box_ = 'box'

31_limiterrors = True # in .formy

32_name_value_ = repr('name=value')

33_rangerrors = True # in .dms

34_region_ = 'region'

35_vs__ = _SPACE_(NN, _vs_, NN)

36

37 try:

38 _exception_chaining = None # not available

39 _ = Exception().__cause__ # Python 3.9+ exception chaining

40

41 if _PYTHON_X_DEV or _getenv('PYGEODESY_EXCEPTION_CHAINING', NN): # == _std_

42 _exception_chaining = True # turned on, std

43 raise AttributeError # allow exception chaining

44

45 _exception_chaining = False # turned off

46

47 def _error_cause(inst, cause=None):

48 '''(INTERNAL) Set or avoid Python 3+ exception chaining.

49

50 Setting C{inst.__cause__ = None} is equivalent to syntax

51 C{raise Error(...) from None} to avoid exception chaining.

52

53 @arg inst: An error instance (I{caught} C{Exception}).

54 @kwarg cause: A previous error instance (I{caught} C{Exception})

55 or C{None} to avoid exception chaining.

56

57 @see: Alex Martelli, et.al., "Python in a Nutshell", 3rd Ed., page 163,

58 O'Reilly, 2017, U{PEP-3134<https://www.Python.org/dev/peps/pep-3134>},

59 U{here<https://StackOverflow.com/questions/17091520/how-can-i-more-

60 easily-suppress-previous-exceptions-when-i-raise-my-own-exception>}

61 and U{here<https://StackOverflow.com/questions/1350671/

62 inner-exception-with-traceback-in-python>}.

63 '''

64 inst.__cause__ = cause # None, no exception chaining

65 return inst

66

67 except AttributeError: # Python 2+

68

69 def _error_cause(inst, **unused): # PYCHOK expected

70 return inst # no-op

71

72

73 class _AssertionError(AssertionError):

74 '''(INTERNAL) Format an C{AssertionError} with/-out exception chaining.

75 '''

76 def __init__(self, *args, **kwds):

77 _error_init(AssertionError, self, args, **kwds)

78

79

80 class _AttributeError(AttributeError):

81 '''(INTERNAL) Format an C{AttributeError} with/-out exception chaining.

82 '''

83 def __init__(self, *args, **kwds):

84 _error_init(AttributeError, self, args, **kwds)

85

86

87 class _ImportError(ImportError):

88 '''(INTERNAL) Format an C{ImportError} with/-out exception chaining.

89 '''

90 def __init__(self, *args, **kwds):

91 _error_init(ImportError, self, args, **kwds)

92

93

94 class _IndexError(IndexError):

95 '''(INTERNAL) Format an C{IndexError} with/-out exception chaining.

96 '''

97 def __init__(self, *args, **kwds):

98 _error_init(IndexError, self, args, **kwds)

99

100

101 class _KeyError(KeyError):

102 '''(INTERNAL) Format a C{KeyError} with/-out exception chaining.

103 '''

104 def __init__(self, *args, **kwds): # txt=_invalid_

105 _error_init(KeyError, self, args, **kwds)

106

107

108 class _NameError(NameError):

109 '''(INTERNAL) Format a C{NameError} with/-out exception chaining.

110 '''

111 def __init__(self, *args, **kwds):

112 _error_init(NameError, self, args, **kwds)

113

114

115 class _NotImplementedError(NotImplementedError):

116 '''(INTERNAL) Format a C{NotImplementedError} with/-out exception chaining.

117 '''

118 def __init__(self, *args, **kwds):

119 _error_init(NotImplementedError, self, args, **kwds)

120

121

122 class _OverflowError(OverflowError):

123 '''(INTERNAL) Format an C{OverflowError} with/-out exception chaining.

124 '''

125 def __init__(self, *args, **kwds): # txt=_invalid_

126 _error_init(OverflowError, self, args, **kwds)

127

128

129 class _TypeError(TypeError):

130 '''(INTERNAL) Format a C{TypeError} with/-out exception chaining.

131 '''

132 def __init__(self, *args, **kwds):

133 _error_init(TypeError, self, args, fmt_name_value='type(%s) (%r)', **kwds)

134

135

136 def _TypesError(name, value, *Types, **kwds):

137 '''(INTERNAL) Format a C{TypeError} with/-out exception chaining.

138 '''

139 # no longer C{class _TypesError} to avoid missing value

140 # argument errors in _XError line ...E = Error(str(e))

141 t = _not_(_an(_or(*(t.__name__ for t in Types))))

142 return _TypeError(name, value, txt=t, **kwds)

143

144

145 class _ValueError(ValueError):

146 '''(INTERNAL) Format a C{ValueError} with/-out exception chaining.

147 '''

148 def __init__(self, *args, **kwds): # ..., cause=None, txt=_invalid_, ...

149 _error_init(ValueError, self, args, **kwds)

150

151

152 class _ZeroDivisionError(ZeroDivisionError):

153 '''(INTERNAL) Format a C{ZeroDivisionError} with/-out exception chaining.

154 '''

155 def __init__(self, *args, **kwds):

156 _error_init(ZeroDivisionError, self, args, **kwds)

157

158

159 class AuxError(_ValueError):

160 '''Error raised for a L{rhumb.aux_}, C{Aux}, C{AuxDLat} or C{AuxLat} issue.

161 '''

162 pass

163

164

165 class ClipError(_ValueError):

166 '''Clip box or clip region issue.

167 '''

168 def __init__(self, *name_n_corners, **txt_cause):

169 '''New L{ClipError}.

170

171 @arg name_n_corners: Either just a name (C{str}) or

172 name, number, corners (C{str},

173 C{int}, C{tuple}).

174 @kwarg txt_cause: Optional C{B{txt}=str} explanation

175 of the error and C{B{cause}=None}

176 for exception chaining.

177 '''

178 if len(name_n_corners) == 3:

179 t, n, v = name_n_corners

180 n = _SPACE_(t, _clip_, (_box_ if n == 2 else _region_))

181 name_n_corners = n, v

182 _ValueError.__init__(self, *name_n_corners, **txt_cause)

183

184

185 class CrossError(_ValueError):

186 '''Error raised for zero or near-zero vectorial cross products,

187 occurring for coincident or colinear points, lines or bearings.

188 '''

189 pass

190

191

192 class GeodesicError(_ValueError):

193 '''Error raised for lack of convergence or other issues in L{pygeodesy.geodesicx},

194 L{pygeodesy.geodesicw} or L{pygeodesy.karney}.

195 '''

196 pass

197

198

199 class IntersectionError(_ValueError): # in .ellipsoidalBaseDI, .formy, ...

200 '''Error raised for line or circle intersection issues.

201 '''

202 def __init__(self, *args, **kwds):

203 '''New L{IntersectionError}.

204 '''

205 if args:

206 _ValueError.__init__(self, _SPACE_(*args), **kwds)

207 else:

208 _ValueError.__init__(self, **kwds)

209

210

211 class LenError(_ValueError): # in .ecef, .fmath, .heights, .iters, .named

212 '''Error raised for mis-matching C{len} values.

213 '''

214 def __init__(self, where, **lens_txt): # txt=None

215 '''New L{LenError}.

216

217 @arg where: Object with C{.__name__} attribute

218 (C{class}, C{method}, or C{function}).

219 @kwarg lens_txt: Two or more C{name=len(name)} pairs

220 (C{keyword arguments}).

221 '''

222 def _ns_vs_txt_x(cause=None, txt=_invalid_, **kwds):

223 ns, vs = zip(*_MODS.basics.itemsorted(kwds)) # unzip

224 return ns, vs, txt, cause

225

226 ns, vs, txt, x = _ns_vs_txt_x(**lens_txt)

227 ns = _COMMASPACE_.join(ns)

228 t = _MODS.streprs.Fmt.PAREN(where.__name__, ns)

229 vs = _vs__.join(map(str, vs))

230 t = _SPACE_(t, _len_, vs)

231 _ValueError.__init__(self, t, txt=txt, cause=x)

232

233

234 class LimitError(_ValueError):

235 '''Error raised for lat- or longitudinal values or deltas exceeding

236 the given B{C{limit}} in functions L{pygeodesy.equirectangular},

237 L{pygeodesy.equirectangular_}, C{nearestOn*} and C{simplify*}

238 or methods with C{limit} or C{options} keyword arguments.

239

240 @see: Subclass L{UnitError}.

241 '''

242 pass

243

244

245 class MGRSError(_ValueError):

246 '''Military Grid Reference System (MGRS) parse or other L{Mgrs} issue.

247 '''

248 pass

249

250

251 class NumPyError(_ValueError):

252 '''Error raised for C{NumPy} issues.

253 '''

254 pass

255

256

257 class ParseError(_ValueError): # in .dms, .elevations, .utmupsBase

258 '''Error parsing degrees, radians or several other formats.

259 '''

260 pass

261

262

263 class PointsError(_ValueError): # in .clipy, .frechet, ...

264 '''Error for an insufficient number of points.

265 '''

266 pass

267

268

269 class RangeError(_ValueError):

270 '''Error raised for lat- or longitude values outside the B{C{clip}},

271 B{C{clipLat}}, B{C{clipLon}} in functions L{pygeodesy.parse3llh},

272 L{pygeodesy.parseDMS}, L{pygeodesy.parseDMS2} and L{pygeodesy.parseRad}

273 or the given B{C{limit}} in functions L{pygeodesy.clipDegrees} and

274 L{pygeodesy.clipRadians}.

275

276 @see: Function L{pygeodesy.rangerrors}.

277 '''

278 pass

279

280

281 class RhumbError(_ValueError):

282 '''Error raised for a L{pygeodesy.rhumb.aux_}, L{pygeodesy.rhumb.ekx}

283 or L{pygeodesy.rhumb.solve} issue.

284 '''

285 pass

286

287

288 class TriangleError(_ValueError): # in .resections, .vector2d

289 '''Error raised for triangle, inter- or resection issues.

290 '''

291 pass

292

293

294 class SciPyError(PointsError):

295 '''Error raised for C{SciPy} issues.

296 '''

297 pass

298

299

300 class SciPyWarning(PointsError):

301 '''Error thrown for C{SciPy} warnings.

302

303 To raise C{SciPy} warnings as L{SciPyWarning} exceptions, Python

304 C{warnings} must be filtered as U{warnings.filterwarnings('error')

305 <https://docs.Python.org/3/library/warnings.html#the-warnings-filter>}

306 I{prior to} C{import scipy} OR by setting env var U{PYTHONWARNINGS

307 <https://docs.Python.org/3/using/cmdline.html#envvar-PYTHONWARNINGS>}

308 OR by invoking C{python} with command line option U{-W<https://docs.

309 Python.org/3/using/cmdline.html#cmdoption-w>} set to C{-W error}.

310 '''

311 pass

312

313

314 class TRFError(_ValueError): # in .ellipsoidalBase, .trf, .units

315 '''Terrestrial Reference Frame (TRF), L{Epoch}, L{RefFrame}

316 or L{RefFrame} conversion issue.

317 '''

318 pass

319

320

321 class UnitError(LimitError): # in .named, .units

322 '''Default exception for L{units} issues for a value exceeding the

323 C{low} or C{high} limit.

324 '''

325 pass

326

327

328 class VectorError(_ValueError): # in .nvectorBase, .vector3d, .vector3dBase

329 '''L{Vector3d}, C{Cartesian*} or C{*Nvector} issues.

330 '''

331 pass

332

333

334 def _an(noun):

335 '''(INTERNAL) Prepend an article to a noun based

336 on the pronounciation of the first letter.

337 '''

338 a = _an_ if noun[:1].lower() in 'aeinoux' else _a_

339 return _SPACE_(a, noun)

340

341

342 def _and(*words):

343 '''(INTERNAL) Join C{words} with C{", "} and C{" and "}.

344 '''

345 return _and_or(_and_, *words)

346

347

348 def _and_or(last, *words):

349 '''(INTERNAL) Join C{words} with C{", "} and C{B{last}}.

350 '''

351 t, w = NN, list(words)

352 if w:

353 t = w.pop()

354 if w:

355 w = _COMMASPACE_.join(w)

356 t = _SPACE_(w, last, t)

357 return t

358

359

360 def crosserrors(raiser=None):

361 '''Report or ignore vectorial cross product errors.

362

363 @kwarg raiser: Use C{True} to throw or C{False} to ignore

364 L{CrossError} exceptions. Use C{None} to

365 leave the setting unchanged.

366

367 @return: Previous setting (C{bool}).

368

369 @see: Property C{Vector3d[Base].crosserrors}.

370 '''

371 V = _MODS.vector3dBase.Vector3dBase

372 t = V._crosserrors # XXX class attr!

373 if raiser in (True, False):

374 V._crosserrors = raiser

375 return t

376

377

378 def _error_init(Error, inst, args, fmt_name_value='%s (%r)', txt=NN,

379 cause=None, **kwds): # by .lazily

380 '''(INTERNAL) Format an error text and initialize an C{Error} instance.

381

382 @arg Error: The error super-class (C{Exception}).

383 @arg inst: Sub-class instance to be __init__-ed (C{_Exception}).

384 @arg args: Either just a value or several name, value, ...

385 positional arguments (C{str}, any C{type}), in

386 particular for name conflicts with keyword

387 arguments of C{error_init} or which can't be

388 given as C{name=value} keyword arguments.

389 @kwarg fmt_name_value: Format for (name, value) (C{str}).

390 @kwarg txt: Optional explanation of the error (C{str}).

391 @kwarg cause: Optional, caught error (L{Exception}), for

392 exception chaining (supported in Python 3+).

393 @kwarg kwds: Additional C{B{name}=value} pairs, if any.

394 '''

395 def _fmtuple(pairs):

396 return tuple(fmt_name_value % t for t in pairs)

397

398 t, n = (), len(args)

399 if n > 2:

400 s = _MODS.basics.isodd(n)

401 t = _fmtuple(zip(args[0::2], args[1::2]))

402 if s: # XXX _xzip(..., strict=s)

403 t += args[-1:]

404 elif n == 2:

405 t = (fmt_name_value % args),

406 elif n: # == 1

407 t = str(args[0]),

408

409 if kwds:

410 t += _fmtuple(_MODS.basics.itemsorted(kwds))

411 t = _or(*t) if t else _SPACE_(_name_value_, MISSING)

412

413 if txt is not None:

414 x = str(txt) or (str(cause) if cause else _invalid_)

415 C = _COMMASPACE_ if _COLON_ in t else _COLONSPACE_

416 t = C(t, x)

417# else: # LenError, _xzip, .dms, .heights, .vector2d

418# x = NN # XXX or t?

419 Error.__init__(inst, t)

420# inst.__x_txt__ = x # hold explanation

421 _error_cause(inst, cause=cause if _exception_chaining else None)

422 _error_under(inst)

423

424

425 def _error_under(inst):

426 '''(INTERNAL) Remove leading underscore from instance' class name.

427 '''

428 n = inst.__class__.__name__ # _tailof?

429 if n.startswith(_UNDER_):

430 inst.__class__.__name__ = n.lstrip(_UNDER_)

431 return inst

432

433

434 def exception_chaining(exc=None):

435 '''Get an error's I{cause} or the exception chaining setting.

436

437 @kwarg exc: An error instance (C{Exception}) or C{None}.

438

439 @return: If C{B{exc} is None}, return C{True} if exception

440 chaining is enabled for PyGeodesy errors, C{False}

441 if turned off and C{None} if not available. If

442 B{C{exc}} is not C{None}, return it's error I{cause}

443 or C{None}.

444

445 @note: To enable exception chaining for C{pygeodesy} errors,

446 set env var C{PYGEODESY_EXCEPTION_CHAINING} to any

447 non-empty value prior to C{import pygeodesy}.

448 '''

449 return _exception_chaining if exc is None else \

450 getattr(exc, '__cause__', None)

451

452

453 def _incompatible(this):

454 '''(INTERNAL) Format an C{"incompatible with ..."} text.

455 '''

456 return _SPACE_(_incompatible_, _with_, this)

457

458

459 def _InvalidError(Error=_ValueError, **txt_name_values_cause): # txt=_invalid_, name=value [, ...]

460 '''(INTERNAL) Create an C{Error} instance.

461

462 @kwarg Error: The error class or sub-class (C{Exception}).

463 @kwarg txt_name_values: One or more C{B{name}=value} pairs

464 and optionally, keyword argument C{B{txt}=str}

465 to override the default C{B{txt}='invalid'} and

466 C{B{cause}=None} for exception chaining.

467

468 @return: An B{C{Error}} instance.

469 '''

470 return _XError(Error, **txt_name_values_cause)

471

472

473 def isError(exc):

474 '''Check a (caught) exception.

475

476 @arg exc: The exception C({Exception}).

477

478 @return: C{True} if B{C{exc}} is a C{pygeodesy} error,

479 C{False} if B{C{exc}} is a standard Python error

480 of C{None} if neither.

481 '''

482 def _X(exc):

483 X = type(exc)

484 m = X.__module__

485 return _MODS.basics.issubclassof(X, *_XErrors) or \

486 ((m is __name__ or m == __name__) and

487 _tailof(X.__name__).startswith(_UNDER_))

488

489 return True if isinstance(exc, _XErrors) else (

490 _X(exc) if isinstance(exc, Exception) else None)

491

492

493 def _IsnotError(*nouns, **name_value_Error_cause): # name=value [, Error=TypeError, cause=None]

494 '''Create a C{TypeError} for an invalid C{name=value} type.

495

496 @arg nouns: One or more expected class or type names, usually nouns (C{str}).

497 @kwarg name_value_Error_cause: One C{B{name}=value} pair and optionally,

498 keyword argument C{B{Error}=TypeError} to override the default

499 and C{B{cause}=None} for exception chaining.

500

501 @return: A C{TypeError} or an B{C{Error}} instance.

502 '''

503 def _n_v_E_x(cause=None, Error=TypeError, **name_value):

504 return _xkwds_item2(name_value) + (Error, cause)

505

506 n, v, E, x = _n_v_E_x(**name_value_Error_cause)

507

508 n = _MODS.streprs.Fmt.PARENSPACED(n, repr(v))

509 t = _not_(_an(_or(*nouns)) if nouns else _specified_)

510 return _XError(E, n, txt=t, cause=x)

511

512

513 def limiterrors(raiser=None):

514 '''Get/set the throwing of L{LimitError}s.

515

516 @kwarg raiser: Choose C{True} to raise or C{False} to

517 ignore L{LimitError} exceptions. Use

518 C{None} to leave the setting unchanged.

519

520 @return: Previous setting (C{bool}).

521 '''

522 global _limiterrors

523 t = _limiterrors

524 if raiser in (True, False):

525 _limiterrors = raiser

526 return t

527

528

529 def _or(*words):

530 '''(INTERNAL) Join C{words} with C{", "} and C{" or "}.

531 '''

532 return _and_or(_or_, *words)

533

534

535 def _parseX(parser, *args, **name_values_Error): # name=value[, ..., Error=ParseError]

536 '''(INTERNAL) Invoke a parser and handle exceptions.

537

538 @arg parser: The parser (C{callable}).

539 @arg args: Any B{C{parser}} arguments (any C{type}s).

540 @kwarg name_values_Error: Any C{B{name}=value} pairs and

541 optionally, C{B{Error}=ParseError} keyword

542 argument to override the default.

543

544 @return: Parser result.

545

546 @raise ParseError: Or the specified C{B{Error}}.

547 '''

548 try:

549 return parser(*args)

550 except Exception as x:

551 E = type(x) if isError(x) else ParseError

552 E, kwds = _xkwds_pop2(name_values_Error, Error=E)

553 raise _XError(E, **_xkwds(kwds, cause=x))

554

555

556 def rangerrors(raiser=None):

557 '''Get/set the throwing of L{RangeError}s.

558

559 @kwarg raiser: Choose C{True} to raise or C{False} to ignore

560 L{RangeError} exceptions. Use C{None} to leave

561 the setting unchanged.

562

563 @return: Previous setting (C{bool}).

564 '''

565 global _rangerrors

566 t = _rangerrors

567 if raiser in (True, False):

568 _rangerrors = raiser

569 return t

570

571

572 def _SciPyIssue(exc, *extras): # PYCHOK no cover

573 if isinstance(exc, (RuntimeWarning, UserWarning)):

574 E = SciPyWarning

575 else:

576 E = SciPyError # PYCHOK not really

577 t = _SPACE_(str(exc).strip(), *extras)

578 return E(t, txt=None, cause=exc)

579

580

581 def _xAssertionError(where, *args, **kwds):

582 '''(INTERNAL) Embellish an C{AssertionError} with/-out exception chaining.

583 '''

584 x, kwds = _xkwds_pop2(kwds, cause=None)

585 w = _MODS.streprs.unstr(where, *args, **kwds)

586 return _AssertionError(w, txt=None, cause=x)

587

588

589 def _xattr(obj, **name_default): # see .strerprs._xattrs

590 '''(INTERNAL) Get an C{obj}'s attribute by C{name}.

591 '''

592 if len(name_default) == 1:

593 for n, d in name_default.items():

594 return getattr(obj, n, d)

595 raise _xAssertionError(_xattr, obj, **name_default)

596

597

598 def _xcallable(**names_callables):

599 '''(INTERNAL) Check one or more C{callable}s.

600 '''

601 for n, c in names_callables.items():

602 if not callable(c):

603 raise _TypeError(n, c, txt=_not_(callable.__name__))

604

605

606 def _xdatum(datum1, datum2, Error=None):

607 '''(INTERNAL) Check for datum, ellipsoid or rhumb mis-match.

608 '''

609 if Error:

610 e1, e2 = datum1.ellipsoid, datum2.ellipsoid

611 if e1 != e2:

612 raise Error(e2.named2, txt=_incompatible(e1.named2))

613 elif datum1 != datum2:

614 t = _SPACE_(_datum_, repr(datum1.name),

615 _not_, repr(datum2.name))

616 raise _AssertionError(t)

617

618

619 def _xellipsoidal(**name_value): # see _xellipsoidall elel

620 '''(INTERNAL) Check an I{ellipsoidal} item and return its value.

621 '''

622 if len(name_value) == 1:

623 for n, v in name_value.items():

624 try:

625 if v.isEllipsoidal:

626 return v

627 except AttributeError:

628 pass

629 raise _TypeError(n, v, txt=_not_(_ellipsoidal_))

630 raise _xAssertionError(_xellipsoidal, name_value)

631

632

633 def _xellipsoidall(point): # see _xellipsoidal

634 '''(INTERNAL) Check an ellipsoidal C{point}, return C{True}

635 if geodetic latlon or C{False} if cartesian.

636 '''

637 m = _MODS.ellipsoidalBase

638 ll = isinstance(point, m.LatLonEllipsoidalBase)

639 if not ll:

640 b = _MODS.basics

641 b._xinstanceof(m.CartesianEllipsoidalBase,

642 m.LatLonEllipsoidalBase, point=point)

643 return ll

644

645

646 def _XError(Error, *args, **kwds):

647 '''(INTERNAL) Format an C{Error} or C{_Error}.

648 '''

649 try: # C{_Error} style

650 return Error(*args, **kwds)

651 except TypeError: # no keyword arguments

652 pass

653 e = _ValueError(*args, **kwds)

654 E = Error(str(e))

655 if _exception_chaining:

656 _error_cause(E, cause=e.__cause__) # PYCHOK OK

657 return E

658

659

660 def _xError(exc, *args, **kwds):

661 '''(INTERNAL) Embellish a (caught) exception.

662

663 @arg exc: The exception (usually, C{_Error}).

664 @arg args: Embelishments (C{any}).

665 @kwarg kwds: Embelishments (C{any}).

666 '''

667 return _XError(type(exc), *args, **_xkwds(kwds, cause=exc))

668

669

670 def _xError2(exc): # in .constants, .fsums, .lazily, .vector2d

671 '''(INTERNAL) Map an exception to 2-tuple (C{_Error} class, error C{txt}).

672

673 @arg exc: The exception instance (usually, C{Exception}).

674 '''

675 x = isError(exc)

676 if x:

677 E = type(exc)

678 elif x is None:

679 E = _AssertionError

680 else: # get _Error from Error

681 n = NN(_UNDER_, _tailof(type(exc).__name__))

682 E = _MODS.getattr(__name__, n, _NotImplementedError)

683 x = E is not _NotImplementedError

684 return E, (str(exc) if x else repr(exc))

685

686

687_XErrors = (_AssertionError, _AttributeError, # some isError's

688 _TypeError, _ValueError, _ZeroDivisionError)

689# map certain C{Exception} classes to the C{_Error}

690# _X2Error = {AssertionError: _AssertionError, ...

691# ZeroDivisionError: _ZeroDivisionError}

692

693 try:

694 _ = {}.__or__ # {} | {} # Python 3.9+

695

696 def _xkwds(kwds, **dflts):

697 '''(INTERNAL) Update C{dflts} with specified C{kwds}.

698 '''

699 return (dflts | kwds) if kwds else dflts

700

701 except AttributeError:

702

703 def _xkwds(kwds, **dflts): # PYCHOK expected

704 '''(INTERNAL) Update C{dflts} with specified C{kwds}.

705 '''

706 d = dflts

707 if kwds:

708 d = _copy(d)

709 d.update(kwds)

710 return d

711

712

713# def _xkwds_bool(inst, **kwds): # no longer in .frechet, .hausdorff, .heights

714# '''(INTERNAL) Set applicable C{bool} properties/attributes.

715# '''

716# for n, v in kwds.items():

717# b = getattr(inst, n, None)

718# if b is None: # invalid bool attr

719# t = _SPACE_(_EQUAL_(n, repr(v)), 'for', inst.__class__.__name__) # XXX .classname

720# raise _AttributeError(t, txt=_not_('applicable'))

721# if v in (False, True) and v != b:

722# setattr(inst, NN(_UNDER_, n), v)

723

724

725 def _xkwds_get(kwds, **name_default):

726 '''(INTERNAL) Get a C{kwds} value by C{name} or the

727 C{default} if not present.

728 '''

729 if isinstance(kwds, dict) and len(name_default) == 1:

730 for n, d in name_default.items():

731 return kwds.get(n, d)

732 raise _xAssertionError(_xkwds_get, kwds, **name_default)

733

734

735 def _xkwds_get_(kwds, **names_defaults):

736 '''(INTERNAL) Yield each C{kwds} value or its C{default}

737 in I{case-insensitive, alphabetical} C{name} order.

738 '''

739 if not isinstance(kwds, dict):

740 raise _xAssertionError(_xkwds_get_, kwds)

741 for n, d in _MODS.basics.itemsorted(names_defaults):

742 yield kwds.get(n, d)

743

744

745 def _xkwds_item2(kwds):

746 '''(INTERNAL) Return the 2-tuple C{item}, keeping the

747 single-item C{kwds} I{unmodified}.

748 '''

749 if isinstance(kwds, dict) and len(kwds) == 1:

750 for item in kwds.items():

751 return item

752 raise _xAssertionError(_xkwds_item2, kwds)

753

754

755 def _xkwds_not(*args, **kwds):

756 '''(INTERNAL) Return C{kwds} with a value not in C{args}.

757 '''

758 return dict((n, v) for n, v in kwds.items() if v not in args)

759

760

761 def _xkwds_pop2(kwds, **name_default):

762 '''(INTERNAL) Pop a C{kwds} item by C{name} and return the value and

763 reduced C{kwds} copy, otherwise the C{default} and original C{kwds}.

764 '''

765 if isinstance(kwds, dict) and len(name_default) == 1:

766 for n, d in name_default.items():

767 if n in kwds:

768 kwds = _copy(kwds)

769 d = kwds.pop(n, d)

770 return d, kwds

771 raise _xAssertionError(_xkwds_pop2, kwds, **name_default)

772

773

774 def _Xorder(_Coeffs, Error, **Xorder): # in .auxLat, .ktm, .rhumb.bases, .rhumb.ekx

775 '''(INTERNAL) Validate C{RAorder} or C{TMorder}.

776 '''

777 X, m = _xkwds_item2(Xorder)

778 if m in _Coeffs and _MODS.basics.isint(m):

779 return m

780 t = sorted(map(str, _Coeffs.keys()))

781 raise Error(X, m, txt=_not_(_or(*t)))

782

783# **) MIT License

784#

785# Copyright (C) 2016-2024 -- mrJean1 at Gmail -- All Rights Reserved.

786#

787# Permission is hereby granted, free of charge, to any person obtaining a

788# copy of this software and associated documentation files (the "Software"),

789# to deal in the Software without restriction, including without limitation

790# the rights to use, copy, modify, merge, publish, distribute, sublicense,

791# and/or sell copies of the Software, and to permit persons to whom the

792# Software is furnished to do so, subject to the following conditions:

793#

794# The above copyright notice and this permission notice shall be included

795# in all copies or substantial portions of the Software.

796#

797# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

798# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

799# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL

800# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR

801# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,

802# ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR

803# OTHER DEALINGS IN THE SOFTWARE.