Coverage for pygeodesy/named.py: 96%

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

4u'''(INTERNAL) Nameable class instances.

6Classes C{_Named}, C{_NamedDict}, C{_NamedEnum}, C{_NamedEnumItem} and

7C{_NamedTuple} and several subclasses thereof, all with nameable instances.

9The items in a C{_NamedDict} are accessable as attributes and the items

10in a C{_NamedTuple} are named to be accessable as attributes, similar to

11standard Python C{namedtuple}s.

13@see: Module L{pygeodesy.namedTuples} for (most of) the C{Named-Tuples}.

14'''

16from pygeodesy.basics import isbool, isidentifier, iskeyword, isstr, itemsorted, \

17 len2, _xcopy, _xdup, _xinstanceof, _xsubclassof, _zip

18# from pygeodesy.ecef import EcefKarney # _MODS

19from pygeodesy.errors import _AssertionError, _AttributeError, _ImmutableError, \

20 _incompatible, _KeyError, LenError, _NameError, \

21 _NotImplementedError, _TypeError, _TypesError, \

22 _UnexpectedError, UnitError, _ValueError, \

23 _xattr, _xkwds, _xkwds_item2, _xkwds_pop2

24from pygeodesy.internals import _caller3, _envPYGEODESY, _isPyPy, _sizeof, \

25 typename, _under

26from pygeodesy.interns import MISSING, NN, _AT_, _COLON_, _COLONSPACE_, _COMMA_, \

27 _COMMASPACE_, _DNAME_, _doesn_t_exist_, _DOT_, _DUNDER_, \

28 _EQUAL_, _exists_, _name_, _NL_, _NN_, _no_, _other_, \

29 _s_, _SPACE_, _std_, _UNDER_, _vs_

30from pygeodesy.lazily import _ALL_DOCS, _ALL_LAZY, _ALL_MODS as _MODS

31from pygeodesy.props import _allPropertiesOf_n, deprecated_method, _hasProperty, \

32 _update_all, property_doc_, Property_RO, property_RO, \

33 _update_attrs

34from pygeodesy.streprs import attrs, Fmt, lrstrip, pairs, reprs, unstr

35# from pygeodesy.units import _toUnit # _MODS

37__all__ = _ALL_LAZY.named

38__version__ = '26.01.14'

40_COMMANL_ = _COMMA_ + _NL_

41_COMMASPACEDOT_ = _COMMASPACE_ + _DOT_

42_item_ = 'item'

43_MRO_ = 'MRO'

44# __DUNDER gets mangled in class

45_name = _under(_name_)

46_Names_ = '_Names_'

47_registered_ = 'registered' # PYCHOK used!

48_std_NotImplemented = _envPYGEODESY('NOTIMPLEMENTED', NN).lower() == _std_

49_such_ = 'such'

50_Units_ = '_Units_'

51_UP = 2

54class ADict(dict):

55 '''A C{dict} with both key I{and} attribute access to

56 the C{dict} items.

57 '''

58 _iteration = None # Iteration number (C{int}) or C{None}

60 def __getattr__(self, name):

61 '''Get the value of an item by B{C{name}}.

62 '''

63 try:

64 return self[name]

65 except KeyError:

66 if name == _name_:

67 return NN

68 raise self._AttributeError(name)

70 def __repr__(self):

71 '''Default C{repr(self)}.

72 '''

73 return self.toRepr()

75 def __setattr__(self, name, value):

76 '''Set the value of a I{known} item by B{C{name}}.

77 '''

78 try:

79 if self[name] != value:

80 self[name] = value

81 except KeyError:

82 dict.__setattr__(self, name, value)

84 def __str__(self):

85 '''Default C{str(self)}.

86 '''

87 return self.toStr()

89 def _AttributeError(self, name):

90 '''(INTERNAL) Create an C{AttributeError}.

91 '''

92 if _DOT_ not in name: # NOT classname(self)!

93 name = _DOT_(self.typename, name)

94 return _AttributeError(item=name, txt=_doesn_t_exist_)

96 @property_RO

97 def iteration(self): # see .named._NamedBase

98 '''Get the iteration number (C{int}) or

99 C{None} if not available/applicable.

100 '''

101 return self._iteration

102

103 def set_(self, iteration=None, **items): # PYCHOK signature

104 '''Add one or several new items or replace existing ones.

105

106 @kwarg iteration: Optional C{iteration} (C{int}).

107 @kwarg items: One or more C{name=value} pairs.

108 '''

109 if iteration is not None:

110 self._iteration = iteration

111 if items:

112 dict.update(self, items)

113 return self # in RhumbLineBase.Intersecant2, _PseudoRhumbLine.Position, ...

114

115 def _toL(self):

116 '''(INTERNAL) Get items as list.

117 '''

118 return list(_EQUAL_(*t) for t in self.items()) # _kwdstr

119

120 def toRepr(self, **prec_fmt):

121 '''Like C{repr(dict)} but with C{name} prefix and with

122 C{floats} formatted by function L{pygeodesy.fstr}.

123 '''

124 n = _xattr(self, name=NN) or self.typename

125 return Fmt.PAREN(n, self._toT(_EQUAL_, **prec_fmt))

126

127 def toStr(self, **prec_fmt):

128 '''Like C{str(dict)} but with C{floats} formatted by

129 function L{pygeodesy.fstr}.

130 '''

131 return Fmt.CURLY(self._toT(_COLONSPACE_, **prec_fmt))

132

133 def _toT(self, sep, **kwds):

134 '''(INTERNAL) Helper for C{.toRepr} and C{.toStr}.

135 '''

136 kwds = _xkwds(kwds, prec=6, fmt=Fmt.F, sep=sep)

137 return _COMMASPACE_.join(pairs(itemsorted(self), **kwds))

138

139 @property_RO

140 def typename(self):

141 '''Get this C{ADict}'s type name (C{str}).

142 '''

143 return type(self).__name__ # typename(type(self))

144

145

146class _Named(object):

147 '''(INTERNAL) Root class for named objects.

148 '''

149 _iteration = None # iteration number (C{int}) or C{None}

150 _name = NN # name (C{str})

151 _classnaming = False # prefixed (C{bool})

152# _updates = 0 # OBSOLETE Property/property updates

153

154 def __format__(self, fmt): # PYCHOK no cover

155 '''Not implemented.'''

156 return _NotImplemented(self, fmt)

157

158 def __imatmul__(self, other): # PYCHOK no cover

159 '''Not implemented.'''

160 return _NotImplemented(self, other) # PYCHOK Python 3.5+

161

162 def __matmul__(self, other): # PYCHOK no cover

163 '''Not implemented.'''

164 return _NotImplemented(self, other) # PYCHOK Python 3.5+

165

166 def __repr__(self):

167 '''Default C{repr(self)}.

168 '''

169 return Fmt.repr_at(self)

170

171 def __rmatmul__(self, other): # PYCHOK no cover

172 '''Not implemented.'''

173 return _NotImplemented(self, other) # PYCHOK Python 3.5+

174

175 def __str__(self):

176 '''Default C{str(self)}.

177 '''

178 return self.named2

179

180 def attrs(self, *names, **sep_Nones_pairs_kwds):

181 '''Join named attributes as I{name=value} strings, with C{float}s formatted by

182 function L{pygeodesy.fstr}.

183

184 @arg names: The attribute names, all positional (C{str}).

185 @kwarg sep_Nones_pairs_kwds: Keyword arguments for function L{pygeodesy.pairs},

186 except C{B{sep}=", "} and C{B{Nones}=True} to in-/exclude missing

187 or C{None}-valued attributes.

188

189 @return: All C{name=value} pairs, joined by B{C{sep}} (C{str}).

190

191 @see: Functions L{pygeodesy.attrs}, L{pygeodesy.pairs} and L{pygeodesy.fstr}

192 '''

193 sep, kwds = _xkwds_pop2(sep_Nones_pairs_kwds, sep=_COMMASPACE_)

194 return sep.join(attrs(self, *names, **kwds))

195

196 @Property_RO

197 def classname(self):

198 '''Get this object's C{[module.]class} name (C{str}), see

199 property C{.classnaming} and function C{classnaming}.

200 '''

201 return classname(self, prefixed=self._classnaming)

202

203 @property_doc_(''' the class naming (C{bool}).''')

204 def classnaming(self):

205 '''Get the class naming (C{bool}), see function C{classnaming}.

206 '''

207 return self._classnaming

208

209 @classnaming.setter # PYCHOK setter!

210 def classnaming(self, prefixed):

211 '''Set the class naming for C{[module.].class} names (C{bool})

212 to C{True} to include the module name.

213 '''

214 b = bool(prefixed)

215 if self._classnaming != b:

216 self._classnaming = b

217 _update_attrs(self, *_Named_Property_ROs)

218

219 def classof(self, *args, **kwds):

220 '''Create another instance of this very class.

221

222 @arg args: Optional, positional arguments.

223 @kwarg kwds: Optional, keyword arguments.

224

225 @return: New instance (B{self.__class__}).

226 '''

227 return _xnamed(self.__class__(*args, **kwds), self.name)

228

229 def copy(self, deep=False, **name):

230 '''Make a shallow or deep copy of this instance.

231

232 @kwarg deep: If C{True}, make a deep, otherwise a shallow

233 copy (C{bool}).

234 @kwarg name: Optional, non-empty C{B{name}=NN} (C{str}).

235

236 @return: The copy (C{This class}).

237 '''

238 c = _xcopy(self, deep=deep)

239 if name:

240 _ = c.rename(name)

241 return c

242

243 def _DOT_(self, *names):

244 '''(INTERNAL) Period-join C{self.name} and C{names}.

245 '''

246 return _DOT_(self.name, *names)

247

248 def dup(self, deep=False, **items):

249 '''Duplicate this instance, replacing some attributes.

250

251 @kwarg deep: If C{True}, duplicate deep, otherwise shallow

252 (C{bool}).

253 @kwarg items: Attributes to be changed (C{any}), including

254 optional C{B{name}} (C{str}).

255

256 @return: The duplicate (C{This class}).

257

258 @raise AttributeError: Some B{C{items}} invalid.

259 '''

260 n = self.name

261 m, items = _xkwds_pop2(items, name=n)

262 d = _xdup(self, deep=deep, **items)

263 if m != n:

264 d.rename(m) # zap _Named_Property_ROs

265# if items:

266# _update_all(d)

267 return d

268

269 def _instr(self, *attrs, **fmt_prec_props_sep_name__kwds):

270 '''(INTERNAL) Format, used by C{Conic}, C{Ellipsoid}, C{Geodesic...}, C{Transform}, C{Triaxial}.

271 '''

272 def _fmt_prec_props_kwds(fmt=Fmt.F, prec=6, props=(), sep=_COMMASPACE_, **kwds):

273 return fmt, prec, props, sep, kwds

274

275 name, kwds = _name2__(**fmt_prec_props_sep_name__kwds)

276 fmt, prec, props, sep, kwds = _fmt_prec_props_kwds(**kwds)

277

278 t = () if name is None else (Fmt.EQUAL(name=repr(name or self.name)),)

279 if attrs:

280 t += pairs(((a, getattr(self, a)) for a in attrs),

281 prec=prec, ints=True, fmt=fmt)

282 if props:

283 t += pairs(((p.name, getattr(self, p.name)) for p in props),

284 prec=prec, ints=True)

285 if kwds:

286 t += pairs(kwds, prec=prec)

287 return sep.join(t) if sep else t

288

289 @property_RO

290 def iteration(self): # see .karney.GDict

291 '''Get the most recent iteration number (C{int}) or C{None}

292 if not available or not applicable.

293

294 @note: The interation number may be an aggregate number over

295 several, nested functions.

296 '''

297 return self._iteration

298

299 def methodname(self, which):

300 '''Get a method C{[module.]class.method} name of this object (C{str}).

301

302 @arg which: The method (C{callable}).

303 '''

304 return _DOT_(self.classname, typename(which) if callable(which) else _NN_)

305

306 @property_doc_(''' the name (C{str}).''')

307 def name(self):

308 '''Get the name (C{str}).

309 '''

310 return self._name

311

312 @name.setter # PYCHOK setter!

313 def name(self, name):

314 '''Set the C{B{name}=NN} (C{str}).

315

316 @raise NameError: Can't rename, use method L{rename}.

317 '''

318 m, n = self._name, _name__(name)

319 if not m:

320 self._name = n

321 elif n != m:

322 n = repr(n)

323 c = self.classname

324 t = _DOT_(c, Fmt.PAREN(typename(self.rename), n))

325 n = _DOT_(c, Fmt.EQUALSPACED(name=n))

326 m = Fmt.PAREN(_SPACE_('was', repr(m)))

327 n = _SPACE_(n, m)

328 raise _NameError(n, txt=_SPACE_('use', t))

329 # to set the name from a sub-class, use

330 # self.name = name or

331 # _Named.name.fset(self, name), but NOT

332 # _Named(self).name = name

333

334 def _name__(self, name): # usually **name

335 '''(INTERNAL) Get the C{name} or this C{name}.

336 '''

337 return _name__(name, _or_nameof=self) # nameof(self)

338

339 def _name1__(self, kwds):

340 '''(INTERNAL) Resolve and set the C{B{name}=NN}.

341 '''

342 return _name1__(kwds, _or_nameof=self.name) if self.name else kwds

343

344 @Property_RO

345 def named(self):

346 '''Get the name I{or} class name or C{""} (C{str}).

347 '''

348 return self.name or self.classname

349

350# @Property_RO

351# def named_(self):

352# '''Get the C{class} name I{and/or} the str(name) or C{""} (C{str}).

353# '''

354# return _xjoined_(self.classname, self.name, enquote=False)

355

356 @Property_RO

357 def named2(self):

358 '''Get the C{class} name I{and/or} the repr(name) or C{""} (C{str}).

359 '''

360 return _xjoined_(self.classname, self.name)

361

362 @Property_RO

363 def named3(self):

364 '''Get the I{prefixed} C{class} name I{and/or} the name or C{""} (C{str}).

365 '''

366 return _xjoined_(classname(self, prefixed=True), self.name)

367

368 @Property_RO

369 def named4(self):

370 '''Get the C{package.module.class} name I{and/or} the name or C{""} (C{str}).

371 '''

372 return _xjoined_(_DOT_(self.__module__, self.typename), self.name)

373

374 def _notImplemented(self, *args, **kwds):

375 '''(INTERNAL) See function L{notImplemented}.

376 '''

377 notImplemented(self, *args, **_xkwds(kwds, up=_UP + 1))

378

379 def _notOverloaded(self, *args, **kwds):

380 '''(INTERNAL) See function L{notOverloaded}.

381 '''

382 notOverloaded(self, *args, **_xkwds(kwds, up=_UP + 1))

383

384 def rename(self, name):

385 '''Change the name.

386

387 @arg name: The new name (C{str}).

388

389 @return: The previous name (C{str}).

390 '''

391 m, n = self._name, _name__(name)

392 if n != m:

393 self._name = n

394 _update_attrs(self, *_Named_Property_ROs)

395 return m

396

397 def renamed(self, name):

398 '''Change the name.

399

400 @arg name: The new name (C{str}).

401

402 @return: This instance (C{str}).

403 '''

404 _ = self.rename(name)

405 return self

406

407 @property_RO

408 def sizeof(self):

409 '''Get the current size in C{bytes} of this instance (C{int}).

410 '''

411 return _sizeof(self)

412

413 def toRepr(self, **unused): # PYCHOK no cover

414 '''Default C{repr(self)}.

415 '''

416 return repr(self)

417

418 def toStr(self, **unused): # PYCHOK no cover

419 '''Default C{str(self)}.

420 '''

421 return str(self)

422

423 @deprecated_method

424 def toStr2(self, **kwds): # PYCHOK no cover

425 '''DEPRECATED on 23.10.07, use method C{toRepr}.'''

426 return self.toRepr(**kwds)

427

428# def _unstr(self, which, *args, **kwds):

429# '''(INTERNAL) Return the string representation of a method

430# invokation of this instance: C{str(self).method(...)}

431#

432# @see: Function L{pygeodesy.unstr}.

433# '''

434# return _DOT_(self, unstr(which, *args, **kwds))

435

436 @property_RO

437 def typename(self):

438 '''Get this object's type name (C{str}).

439 '''

440 return type(self).__name__ # typename(type(self))

441

442 def _xnamed(self, inst, name=NN, **force):

443 '''(INTERNAL) Set the instance' C{.name = self.name}.

444

445 @arg inst: The instance (C{_Named}).

446 @kwarg name: The name (C{str}).

447 @kwarg force: If C{True}, force rename (C{bool}).

448

449 @return: The B{C{inst}}, renamed if B{C{force}}d

450 or if not named before.

451 '''

452 return _xnamed(inst, name, **force)

453

454 def _xrenamed(self, inst):

455 '''(INTERNAL) Rename the instance' C{.name = self.name}.

456

457 @arg inst: The instance (C{_Named}).

458

459 @return: The B{C{inst}}, named if not named before.

460

461 @raise TypeError: Not C{isinstance(B{inst}, _Named)}.

462 '''

463 _xinstanceof(_Named, inst=inst) # assert

464 return inst.renamed(self.name)

465

466_Named_Property_ROs = _allPropertiesOf_n(5, _Named, Property_RO) # PYCHOK once

467

468

469class _NamedBase(_Named):

470 '''(INTERNAL) Base class with name.

471 '''

472 def __repr__(self):

473 '''Default C{repr(self)}.

474 '''

475 return self.toRepr()

476

477 def __str__(self):

478 '''Default C{str(self)}.

479 '''

480 return self.toStr()

481

482 def others(self, *other, **name_other_up):

483 '''Refined class comparison, invoked as C{.others(other)},

484 C{.others(name=other)} or C{.others(other, name='other')}.

485

486 @arg other: The other instance (any C{type}).

487 @kwarg name_other_up: Overriding C{name=other} and C{up=1}

488 keyword arguments.

489

490 @return: The B{C{other}} iff compatible with this instance's

491 C{class} or C{type}.

492

493 @raise TypeError: Mismatch of the B{C{other}} and this

494 instance's C{class} or C{type}.

495 '''

496 if other: # most common, just one arg B{C{other}}

497 other0 = other[0]

498 if isinstance(other0, self.__class__) or \

499 isinstance(self, other0.__class__):

500 return other0

501

502 other, name, up = _xother3(self, other, **name_other_up)

503 if isinstance(self, other.__class__) or \

504 isinstance(other, self.__class__):

505 return _xnamed(other, name)

506

507 raise _xotherError(self, other, name=name, up=up + 1)

508

509 def toRepr(self, **kwds): # PYCHOK expected

510 '''(INTERNAL) I{Could be overloaded}.

511

512 @kwarg kwds: Optional, C{toStr} keyword arguments.

513

514 @return: C{toStr}() with keyword arguments (as C{str}).

515 '''

516 t = lrstrip(self.toStr(**kwds))

517# if self.name:

518# t = NN(Fmt.EQUAL(name=repr(self.name)), sep, t)

519 return Fmt.PAREN(self.classname, t) # XXX (self.named, t)

520

521# def toRepr(self, **kwds)

522# if kwds:

523# s = NN.join(reprs((self,), **kwds))

524# else: # super().__repr__ only for Python 3+

525# s = super(self.__class__, self).__repr__()

526# return Fmt.PAREN(self.named, s) # clips(s)

527

528 def toStr(self, **kwds): # PYCHOK no cover

529 '''I{Must be overloaded}.'''

530 notOverloaded(self, **kwds)

531

532# def toStr(self, **kwds):

533# if kwds:

534# s = NN.join(strs((self,), **kwds))

535# else: # super().__str__ only for Python 3+

536# s = super(self.__class__, self).__str__()

537# return s

538

539 def _update(self, updated, *attrs, **setters):

540 '''(INTERNAL) Zap cached instance attributes and overwrite C{__dict__} or L{Property_RO} values.

541 '''

542 u = _update_all(self, *attrs) if updated else 0

543 if setters:

544 d = self.__dict__

545 # double-check that setters are Property_RO's

546 for n, v in setters.items():

547 if n in d or _hasProperty(self, n, Property_RO):

548 d[n] = v

549 else:

550 raise _AssertionError(n, v, txt=repr(self))

551 u += len(setters)

552 return u

553

554

555class _NamedDict(ADict, _Named):

556 '''(INTERNAL) Named C{dict} with key I{and} attribute access

557 to the items.

558 '''

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

560 if args: # is args[0] a dict?

561 if len(args) != 1: # or not isinstance(args[0], dict)

562 kwds = _name1__(kwds)

563 t = unstr(self.classname, *args, **kwds) # PYCHOK no cover

564 raise _ValueError(args=len(args), txt=t)

565 kwds = _xkwds(dict(args[0]), **kwds) # args[0] overrides kwds

566 n, kwds = _name2__(**kwds)

567 if n:

568 _Named.name.fset(self, n) # see _Named.name

569 ADict.__init__(self, kwds)

570

571 def __delattr__(self, name):

572 '''Delete an attribute or item by B{C{name}}.

573 '''

574 if name in self: # in ADict.keys(self):

575 ADict.pop(self, name)

576 elif name in (_name_, _name):

577 # ADict.__setattr__(self, name, NN)

578 _Named.rename(self, NN)

579 else:

580 ADict.__delattr__(self, name)

581

582 def __getattr__(self, name):

583 '''Get the value of an item by B{C{name}}.

584 '''

585 try:

586 return self[name]

587 except KeyError:

588 if name == _name_:

589 return _Named.name.fget(self)

590 raise ADict._AttributeError(self, self._DOT_(name))

591

592 def __getitem__(self, key):

593 '''Get the value of an item by B{C{key}}.

594 '''

595 if key == _name_:

596 raise self._KeyError(key)

597 return ADict.__getitem__(self, key)

598

599 def _KeyError(self, key, *value): # PYCHOK no cover

600 '''(INTERNAL) Create a C{KeyError}.

601 '''

602 n = self.name or self.typename

603 t = Fmt.SQUARE(n, key)

604 if value:

605 t = Fmt.EQUALSPACED(t, *value)

606 return _KeyError(t)

607

608 def __setattr__(self, name, value):

609 '''Set attribute or item B{C{name}} to B{C{value}}.

610 '''

611 if name in self: # in ADict.keys(self)

612 ADict.__setitem__(self, name, value) # self[name] = value

613 else:

614 ADict.__setattr__(self, name, value)

615

616 def __setitem__(self, key, value):

617 '''Set item B{C{key}} to B{C{value}}.

618 '''

619 if key == _name_:

620 raise self._KeyError(key, repr(value))

621 ADict.__setitem__(self, key, value)

622

623

624class _NamedEnum(_NamedDict):

625 '''(INTERNAL) Enum-like C{_NamedDict} with attribute access

626 restricted to valid keys.

627 '''

628 _item_Classes = ()

629

630 def __init__(self, Class, *Classes, **name):

631 '''New C{_NamedEnum}.

632

633 @arg Class: Initial class or type acceptable as items

634 values (C{type}).

635 @arg Classes: Additional, acceptable classes or C{type}s.

636 '''

637 self._item_Classes = (Class,) + Classes

638 n = _name__(**name) or NN(typename(Class), _s_)

639 if n and _xvalid(n, underOK=True):

640 _Named.name.fset(self, n) # see _Named.name

641

642 def __getattr__(self, name):

643 '''Get the value of an attribute or item by B{C{name}}.

644 '''

645 return _NamedDict.__getattr__(self, name)

646

647 def __repr__(self):

648 '''Default C{repr(self)}.

649 '''

650 return self.toRepr()

651

652 def __str__(self):

653 '''Default C{str(self)}.

654 '''

655 return self.toStr()

656

657 def _assert(self, **kwds):

658 '''(INTERNAL) Check attribute name against given, registered name.

659 '''

660 pypy = _isPyPy()

661 for n, v in kwds.items():

662 if isinstance(v, _LazyNamedEnumItem): # property

663 assert (n == v.name) if pypy else (n is v.name)

664 # assert not hasattr(self.__class__, n)

665 setattr(self.__class__, n, v)

666 elif isinstance(v, self._item_Classes): # PYCHOK no cover

667 assert self[n] is v and getattr(self, n) \

668 and self.find(v) == n

669 else:

670 raise _TypeError(v, name=n)

671

672 def _asserts(self): # in .triaxials.triaxial3

673 '''(INTERNAL) Yield all asserted items.

674 '''

675 for n, p in tuple(type(self).__dict__.items()):

676 if isinstance(p, _LazyNamedEnumItem):

677 yield n, p

678

679 def find(self, item, dflt=None, all=False):

680 '''Find a registered item.

681

682 @arg item: The item to look for (any C{type}).

683 @kwarg dflt: Value to return if not found (any C{type}).

684 @kwarg all: Use C{True} to search I{all} items or C{False} only

685 the currently I{registered} ones (C{bool}).

686

687 @return: The B{C{item}}'s name if found (C{str}), or C{{dflt}}

688 if there is no such B{C{item}}.

689 '''

690 for k, v in self.items(all=all): # or ADict.items(self)

691 if v is item:

692 return k

693 return dflt

694

695 def get(self, name, dflt=None):

696 '''Get the value of a I{registered} item.

697

698 @arg name: The name of the item (C{str}).

699 @kwarg dflt: Value to return (any C{type}).

700

701 @return: The item with B{C{name}} if found, or B{C{dflt}} if

702 there is no I{registered} item with that B{C{name}}.

703 '''

704 # getattr needed to instantiate L{_LazyNamedEnumItem}

705 return getattr(self, name, dflt)

706

707 def items(self, all=False, asorted=False):

708 '''Yield all or only the I{registered} items.

709

710 @kwarg all: Use C{True} to yield I{all} items or C{False} for

711 only the currently I{registered} ones (C{bool}).

712 @kwarg asorted: If C{True}, yield the items in I{alphabetical,

713 case-insensitive} order (C{bool}).

714 '''

715 if all: # instantiate any remaining L{_LazyNamedEnumItem}

716 for n, _ in self._asserts():

717 _ = getattr(self, n)

718 return itemsorted(self) if asorted else ADict.items(self)

719

720 def keys(self, **all_asorted):

721 '''Yield the name (C{str}) of I{all} or only the currently I{registered}

722 items, optionally sorted I{alphabetically, case-insensitively}.

723

724 @kwarg all_asorted: See method C{items}.

725 '''

726 for k, _ in self.items(**all_asorted):

727 yield k

728

729 def popitem(self):

730 '''Remove I{an, any} currently I{registed} item.

731

732 @return: The removed item.

733 '''

734 return self._zapitem(*ADict.popitem(self))

735

736 def register(self, item):

737 '''Registed one new item or I{all} or I{any} unregistered ones.

738

739 @arg item: The item (any C{type}) or B{I{all}} or B{C{any}}.

740

741 @return: The item name (C{str}) or C("all") or C{"any"}.

742

743 @raise NameError: An B{C{item}} with that name is already

744 registered the B{C{item}} has no or an

745 invalid name.

746

747 @raise TypeError: The B{C{item}} type invalid.

748 '''

749 if item is all or item is any:

750 _ = self.items(all=True)

751 n = typename(item)

752 else:

753 try:

754 n = item.name

755 if not (n and isstr(n) and isidentifier(n)):

756 raise ValueError()

757 except (AttributeError, ValueError, TypeError) as x:

758 n = _DOT_(_item_, _name_)

759 raise _NameError(n, item, cause=x)

760 if n in self:

761 t = _SPACE_(_item_, self._DOT_(n), _exists_)

762 raise _NameError(t, txt=repr(item))

763 if not isinstance(item, self._item_Classes): # _xinstanceof

764 n = self._DOT_(n)

765 raise _TypesError(n, item, *self._item_Classes)

766 self[n] = item

767 return n

768

769 def unregister(self, name_or_item):

770 '''Remove a I{registered} item.

771

772 @arg name_or_item: Name (C{str}) or the item (any C{type}).

773

774 @return: The unregistered item.

775

776 @raise AttributeError: No such B{C{item}}.

777

778 @raise NameError: No item with that B{C{name}}.

779 '''

780 if isstr(name_or_item):

781 name = name_or_item

782 else:

783 name = self.find(name_or_item, dflt=MISSING) # all=True?

784 if name is MISSING:

785 t = _SPACE_(_no_, _such_, self.classname, _item_)

786 raise _AttributeError(t, txt=repr(name_or_item))

787 try:

788 item = ADict.pop(self, name)

789 except KeyError:

790 raise _NameError(item=self._DOT_(name), txt=_doesn_t_exist_)

791 return self._zapitem(name, item)

792

793 pop = unregister

794

795 def toRepr(self, prec=6, fmt=Fmt.F, sep=_COMMANL_, **all_asorted): # PYCHOK _NamedDict, ADict

796 '''Like C{repr(dict)} but C{name}s optionally sorted and

797 C{floats} formatted by function L{pygeodesy.fstr}.

798 '''

799 t = ((self._DOT_(n), v) for n, v in self.items(**all_asorted))

800 return sep.join(pairs(t, prec=prec, fmt=fmt, sep=_COLONSPACE_))

801

802 def toStr(self, *unused, **all_asorted): # PYCHOK _NamedDict, ADict

803 '''Return a string with all C{name}s, optionally sorted.

804 '''

805 return self._DOT_(_COMMASPACEDOT_.join(self.keys(**all_asorted)))

806

807 def values(self, **all_asorted):

808 '''Yield the value (C{type}) of all or only the I{registered} items,

809 optionally sorted I{alphabetically} and I{case-insensitively}.

810

811 @kwarg all_asorted: See method C{items}.

812 '''

813 for _, v in self.items(**all_asorted):

814 yield v

815

816 def _zapitem(self, name, item):

817 # remove _LazyNamedEnumItem property value if still present

818 if self.__dict__.get(name, None) is item:

819 self.__dict__.pop(name) # [name] = None

820 item._enum = None

821 return item

822

823

824class _LazyNamedEnumItem(property_RO): # XXX or descriptor?

825 '''(INTERNAL) Lazily instantiated L{_NamedEnumItem}.

826 '''

827 pass

828

829

830def _lazyNamedEnumItem(name, *args, **kwds):

831 '''(INTERNAL) L{_LazyNamedEnumItem} property-like factory.

832

833 @see: Luciano Ramalho, "Fluent Python", O'Reilly, Example

834 19-24, 2016 p. 636 or Example 22-28, 2022 p. 869+

835 '''

836 def _fget(inst):

837 # assert isinstance(inst, _NamedEnum)

838 try: # get the item from the instance' __dict__

839 # item = inst.__dict__[name] # ... or ADict

840 item = inst[name]

841 except KeyError:

842 # instantiate an _NamedEnumItem, it self-registers

843 item = inst._Lazy(*args, **_xkwds(kwds, name=name))

844 # assert inst[name] is item # MUST be registered

845 # store the item in the instance' __dict__ ...

846 # inst.__dict__[name] = item # ... or update the

847 inst.update({name: item}) # ... ADict for Triaxials

848 # remove the property from the registry class, such that

849 # (a) the property no longer overrides the instance' item

850 # in inst.__dict__ and (b) _NamedEnum.items(all=True) only

851 # sees any un-instantiated ones yet to be instantiated

852 p = getattr(inst.__class__, name, None)

853 if isinstance(p, _LazyNamedEnumItem):

854 delattr(inst.__class__, name)

855 # assert isinstance(item, _NamedEnumItem)

856 return item

857

858 p = _LazyNamedEnumItem(_fget)

859 p.name = name

860 return p

861

862

863class _NamedEnumItem(_NamedBase):

864 '''(INTERNAL) Base class for items in a C{_NamedEnum} registry.

865 '''

866 _enum = None

867

868# def __ne__(self, other): # XXX fails for Lcc.conic = conic!

869# '''Compare this and an other item.

870#

871# @return: C{True} if different, C{False} otherwise.

872# '''

873# return not self.__eq__(other)

874

875 @property_doc_(''' the I{registered} name (C{str}).''')

876 def name(self):

877 '''Get the I{registered} name (C{str}).

878 '''

879 return self._name

880

881 @name.setter # PYCHOK setter!

882 def name(self, name):

883 '''Set the name, unless already registered (C{str}).

884 '''

885 name = _name__(name) or _NN_

886 if self._enum:

887 raise _NameError(name, self, txt=_registered_) # _TypeError

888 if name:

889 self._name = name

890

891 def _register(self, enum, name):

892 '''(INTERNAL) Add this item as B{C{enum.name}}.

893

894 @note: Don't register if name is empty or doesn't

895 start with a letter.

896 '''

897 name = _name__(name)

898 if name and _xvalid(name, underOK=True):

899 self.name = name

900 if name[:1].isalpha(): # '_...' not registered

901 enum.register(self)

902 self._enum = enum

903

904 def unregister(self):

905 '''Remove this instance from its C{_NamedEnum} registry.

906

907 @raise AssertionError: Mismatch of this and registered item.

908

909 @raise NameError: This item is unregistered.

910 '''

911 enum = self._enum

912 if enum and self.name and self.name in enum:

913 item = enum.unregister(self.name)

914 if item is not self: # PYCHOK no cover

915 t = _SPACE_(repr(item), _vs_, repr(self))

916 raise _AssertionError(t)

917

918

919# from pygeodesy.props import _NamedProperty

920

921

922class _NamedTuple(tuple, _Named):

923 '''(INTERNAL) Base for named C{tuple}s with both index I{and}

924 attribute name access to the items.

925

926 @note: This class is similar to Python's C{namedtuple},

927 but statically defined, lighter and limited.

928 '''

929 _Names_ = () # item names, non-identifier, no leading underscore

930 '''Tuple specifying the C{name} of each C{Named-Tuple} item.

931

932 @note: Specify at least 2 item names.

933 '''

934 _Units_ = () # .units classes

935 '''Tuple defining the C{units} of the value of each C{Named-Tuple} item.

936

937 @note: The C{len(_Units_)} must match C{len(_Names_)}.

938 '''

939 _validated = False # set to True I{per sub-class!}

940

941 def __new__(cls, arg, *args, **iteration_name):

942 '''New L{_NamedTuple} initialized with B{C{positional}} arguments.

943

944 @arg arg: Tuple items (C{tuple}, C{list}, ...) or first tuple

945 item of several more in other positional arguments.

946 @arg args: Tuple items (C{any}), all positional arguments.

947 @kwarg iteration_name: Only keyword arguments C{B{iteration}=None}

948 and C{B{name}=NN} are used, any other are

949 I{silently} ignored.

950

951 @raise LenError: Unequal number of positional arguments and

952 number of item C{_Names_} or C{_Units_}.

953

954 @raise TypeError: The C{_Names_} or C{_Units_} attribute is

955 not a C{tuple} of at least 2 items.

956

957 @raise ValueError: Item name is not a C{str} or valid C{identifier}

958 or starts with C{underscore}.

959 '''

960 n, args = len2(((arg,) + args) if args else arg)

961 self = tuple.__new__(cls, args)

962 if not self._validated:

963 self._validate()

964

965 N = len(self._Names_)

966 if n != N:

967 raise LenError(self.__class__, args=n, _Names_=N)

968

969 if iteration_name:

970 i, name = _xkwds_pop2(iteration_name, iteration=None)

971 if i is not None:

972 self._iteration = i

973 if name:

974 self.name = name

975 return self

976

977 def __delattr__(self, name):

978 '''Delete an attribute by B{C{name}}.

979

980 @note: Items can not be deleted.

981 '''

982 if name in self._Names_:

983 raise _ImmutableError(self, name) # _del_

984 elif name in (_name_, _name):

985 _Named.__setattr__(self, name, NN) # XXX _Named.name.fset(self, NN)

986 else:

987 tuple.__delattr__(self, name)

988

989 def __getattr__(self, name):

990 '''Get the value of an attribute or item by B{C{name}}.

991 '''

992 try:

993 return tuple.__getitem__(self, self._Names_.index(name))

994 except IndexError: # as x:

995 pass # raise _IndexError(self._DOT_(name), cause=x)

996 except ValueError: # e.g. _iteration

997 try: # tuple has no __getattr__?

998 return tuple.__getattr__(self, name) # __getattribute__?

999 except AttributeError:

1000 pass

1001 raise _AttributeError(self._DOT_(name), txt=repr(self))

1002

1003# def __getitem__(self, index): # index, slice, etc.

1004# '''Get the item(s) at an B{C{index}} or slice.

1005# '''

1006# return tuple.__getitem__(self, index)

1007

1008 def __hash__(self):

1009 return tuple.__hash__(self)

1010

1011 def __repr__(self):

1012 '''Default C{repr(self)}.

1013 '''

1014 return self.toRepr()

1015

1016 def __setattr__(self, name, value):

1017 '''Set attribute or item B{C{name}} to B{C{value}}.

1018 '''

1019 if name in self._Names_:

1020 raise _ImmutableError(self, name, value)

1021 elif name in (_name_, _name):

1022 _Named.__setattr__(self, name, value) # XXX _Named.name.fset(self, value)

1023 else: # e.g. _iteration

1024 tuple.__setattr__(self, name, value)

1025

1026 def __str__(self):

1027 '''Default C{repr(self)}.

1028 '''

1029 return self.toStr()

1030

1031 def _DOT_(self, *names):

1032 '''(INTERNAL) Period-join C{self.classname} and C{names}.

1033 '''

1034 return _DOT_(self.classname, *names)

1035

1036 def dup(self, name=NN, **items):

1037 '''Duplicate this tuple replacing one or more items.

1038

1039 @kwarg name: Optional new name (C{str}).

1040 @kwarg items: Items to be replaced (C{name=value} pairs), if any.

1041

1042 @return: A copy of this tuple with B{C{items}}.

1043

1044 @raise NameError: Some B{C{items}} invalid.

1045 '''

1046 t = list(self)

1047 U = self._Units_

1048 if items:

1049 _ix = self._Names_.index

1050 _2U = _MODS.units._toUnit

1051 try:

1052 for n, v in items.items():

1053 i = _ix(n)

1054 t[i] = _2U(U[i], v, name=n)

1055 except ValueError: # bad item name

1056 raise _NameError(self._DOT_(n), v, this=self)

1057 return self.classof(*t).reUnit(*U, name=name)

1058

1059 def items(self):

1060 '''Yield the items, each as a C{(name, value)} pair (C{2-tuple}).

1061

1062 @see: Method C{.units}.

1063 '''

1064 for n, v in _zip(self._Names_, self): # strict=True

1065 yield n, v

1066

1067 iteritems = items

1068

1069 def reUnit(self, *Units, **name):

1070 '''Replace some of this C{Named-Tuple}'s C{Units}.

1071

1072 @arg Units: One or more C{Unit} classes, all positional.

1073 @kwarg name: Optional C{B{name}=NN} (C{str}).

1074

1075 @return: This instance with updated C{Units}.

1076

1077 @note: This C{Named-Tuple}'s values are I{not updated}.

1078 '''

1079 U = self._Units_

1080 n = min(len(U), len(Units))

1081 if n:

1082 R = Units + U[n:]

1083 if R != U:

1084 self._Units_ = R

1085 return self.renamed(name) if name else self

1086

1087 def toRepr(self, prec=6, sep=_COMMASPACE_, fmt=Fmt.F, **unused): # PYCHOK signature

1088 '''Return this C{Named-Tuple} items as C{name=value} string(s).

1089

1090 @kwarg prec: The C{float} precision, number of decimal digits (0..9).

1091 Trailing zero decimals are stripped for B{C{prec}} values

1092 of 1 and above, but kept for negative B{C{prec}} values.

1093 @kwarg sep: Separator to join (C{str}).

1094 @kwarg fmt: Optional C{float} format (C{letter}).

1095

1096 @return: Tuple items (C{str}).

1097 '''

1098 t = pairs(self.items(), prec=prec, fmt=fmt)

1099# if self.name:

1100# t = (Fmt.EQUAL(name=repr(self.name)),) + t

1101 return Fmt.PAREN(self.named, sep.join(t)) # XXX (self.classname, sep.join(t))

1102

1103 def toStr(self, prec=6, sep=_COMMASPACE_, fmt=Fmt.F, **unused): # PYCHOK signature

1104 '''Return this C{Named-Tuple} items as string(s).

1105

1106 @kwarg prec: The C{float} precision, number of decimal digits (0..9).

1107 Trailing zero decimals are stripped for B{C{prec}} values

1108 of 1 and above, but kept for negative B{C{prec}} values.

1109 @kwarg sep: Separator to join (C{str}).

1110 @kwarg fmt: Optional C{float} format (C{letter}).

1111

1112 @return: Tuple items (C{str}).

1113 '''

1114 t = reprs(self, prec=prec, fmt=fmt)

1115 return Fmt.PAREN(sep.join(t)) if sep else t

1116

1117 def toUnits(self, Error=UnitError, **name): # overloaded in .frechet, .hausdorff

1118 '''Return a copy of this C{Named-Tuple} with each item value wrapped

1119 as an instance of its L{units} class.

1120

1121 @kwarg Error: Error to raise for L{units} issues (C{UnitError}).

1122 @kwarg name: Optional C{B{name}=NN} (C{str}).

1123

1124 @return: A duplicate of this C{Named-Tuple} (C{C{Named-Tuple}}).

1125

1126 @raise Error: Invalid C{Named-Tuple} item or L{units} class.

1127 '''

1128 t = tuple(v for _, v in self.units(Error=Error))

1129 return self.classof(*t).reUnit(*self._Units_, **name)

1130

1131 def units(self, **Error):

1132 '''Yield the items, each as a C{2-tuple (name, value}) with the

1133 value wrapped as an instance of its L{units} class.

1134

1135 @kwarg Error: Optional C{B{Error}=UnitError} to raise.

1136

1137 @raise Error: Invalid C{Named-Tuple} item or L{units} class.

1138

1139 @see: Method C{.items}.

1140 '''

1141 _2U = _MODS.units._toUnit

1142 for n, v, U in _zip(self._Names_, self, self._Units_): # strict=True

1143 yield n, _2U(U, v, name=n, **Error)

1144

1145 iterunits = units

1146

1147 def _validate(self, underOK=False): # see .EcefMatrix

1148 '''(INTERNAL) One-time check of C{_Names_} and C{_Units_}

1149 for each C{_NamedUnit} I{sub-class separately}.

1150 '''

1151 ns = self._Names_

1152 if not (isinstance(ns, tuple) and len(ns) > 1): # XXX > 0

1153 raise _TypeError(self._DOT_(_Names_), ns)

1154 for i, n in enumerate(ns):

1155 if not _xvalid(n, underOK=underOK):

1156 t = Fmt.SQUARE(_Names_=i) # PYCHOK no cover

1157 raise _ValueError(self._DOT_(t), n)

1158

1159 us = self._Units_

1160 if not isinstance(us, tuple):

1161 raise _TypeError(self._DOT_(_Units_), us)

1162 if len(us) != len(ns):

1163 raise LenError(self.__class__, _Units_=len(us), _Names_=len(ns))

1164 for i, u in enumerate(us):

1165 if not (u is None or callable(u)):

1166 t = Fmt.SQUARE(_Units_=i) # PYCHOK no cover

1167 raise _TypeError(self._DOT_(t), u)

1168

1169 type(self)._validated = True

1170

1171 def _xtend(self, xTuple, *items, **name):

1172 '''(INTERNAL) Extend this C{Named-Tuple} with C{items} to an other B{C{xTuple}}.

1173 '''

1174 _xsubclassof(_NamedTuple, xTuple=xTuple)

1175 if len(xTuple._Names_) != (len(self._Names_) + len(items)) or \

1176 xTuple._Names_[:len(self)] != self._Names_: # PYCHOK no cover

1177 c = NN(self.classname, repr(self._Names_))

1178 x = NN(typename(xTuple), repr(xTuple._Names_))

1179 raise TypeError(_SPACE_(c, _vs_, x))

1180 t = self + items

1181 return xTuple(t, name=self._name__(name)) # .reUnit(*self._Units_)

1182

1183

1184def callername(up=1, dflt=NN, source=False, underOK=False):

1185 '''Get the name of the invoking callable.

1186

1187 @kwarg up: Number of call stack frames up (C{int}).

1188 @kwarg dflt: Default return value (C{any}).

1189 @kwarg source: Include source file name and line number (C{bool}).

1190 @kwarg underOK: If C{True}, private, internal callables are OK,

1191 otherwise private callables are skipped (C{bool}).

1192

1193 @return: The callable name (C{str}) or B{C{dflt}} if none found.

1194 '''

1195 try: # see .internals._caller3

1196 for u in range(up, up + 32):

1197 n, f, s = _caller3(u)

1198 if n and (underOK or n.startswith(_DUNDER_) or

1199 not n.startswith(_UNDER_)):

1200 if source:

1201 n = NN(n, _AT_, f, _COLON_, str(s))

1202 return n

1203 except (AttributeError, ValueError):

1204 pass

1205 return dflt

1206

1207

1208def _callername2(args, callername=NN, source=False, underOK=False, up=_UP, **kwds):

1209 '''(INTERNAL) Extract C{callername}, C{source}, C{underOK} and C{up} from C{kwds}.

1210 '''

1211 n = callername or _MODS.named.callername(up=up + 1, source=source,

1212 underOK=underOK or bool(args or kwds))

1213 return n, kwds

1214

1215

1216def _callname(name, class_name, self_name, up=1):

1217 '''(INTERNAL) Assemble the name for an invokation.

1218 '''

1219 n, c = class_name, callername(up=up + 1)

1220 if c:

1221 n = _DOT_(n, Fmt.PAREN(c, name))

1222 if self_name:

1223 n = _SPACE_(n, repr(self_name))

1224 return n

1225

1226

1227def classname(inst, prefixed=None):

1228 '''Return the instance' class name optionally prefixed with the

1229 module name.

1230

1231 @arg inst: The object (any C{type}).

1232 @kwarg prefixed: Include the module name (C{bool}), see

1233 function C{classnaming}.

1234

1235 @return: The B{C{inst}}'s C{[module.]class} name (C{str}).

1236 '''

1237 if prefixed is None:

1238 prefixed = getattr(inst, typename(classnaming), prefixed)

1239 return modulename(inst.__class__, prefixed=prefixed)

1240

1241

1242def classnaming(prefixed=None):

1243 '''Get/set the default class naming for C{[module.]class} names.

1244

1245 @kwarg prefixed: Include the module name (C{bool}).

1246

1247 @return: Previous class naming setting (C{bool}).

1248 '''

1249 t = _Named._classnaming

1250 if isbool(prefixed):

1251 _Named._classnaming = prefixed

1252 return t

1253

1254

1255def modulename(clas, prefixed=None): # in .basics._xversion

1256 '''Return the class name optionally prefixed with the

1257 module name.

1258

1259 @arg clas: The class (any C{class} or C{str}).

1260 @kwarg prefixed: Include the module name (C{bool}), see

1261 function C{classnaming}.

1262

1263 @return: The B{C{class}}'s C{[module.]class} name (C{str}).

1264 '''

1265 try:

1266 n = typename(clas)

1267 except AttributeError:

1268 n = clas if isstr(clas) else _DNAME_

1269 if prefixed or (classnaming() if prefixed is None else False):

1270 try:

1271 m = clas.__module__.rsplit(_DOT_, 1)

1272 n = _DOT_.join(m[1:] + [n])

1273 except AttributeError:

1274 pass

1275 return n

1276

1277

1278# def _name__(name=NN, name__=None, _or_nameof=None, **kwds):

1279# '''(INTERNAL) Get single keyword argument C{B{name}=NN|None}.

1280# '''

1281# if kwds: # "unexpected keyword arguments ..."

1282# m = _MODS.errors

1283# raise m._UnexpectedError(**kwds)

1284# if name: # is given

1285# n = _name__(**name) if isinstance(name, dict) else str(name)

1286# elif name__ is not None:

1287# n = getattr(name__, _DNAME_, NN) # _xattr(name__, __name__=NN)

1288# else:

1289# n = name # NN or None or {} or any False type

1290# if _or_nameof is not None and not n:

1291# n = getattr(_or_nameof, _name_, NN) # _xattr(_or_nameof, name=NN)

1292# return n # str or None or {}

1293

1294

1295def _name__(name=NN, **kwds):

1296 '''(INTERNAL) Get single keyword argument C{B{name}=NN|None}.

1297 '''

1298 if name or kwds:

1299 name, kwds = _name2__(name, **kwds)

1300 if kwds: # "unexpected keyword arguments ..."

1301 raise _UnexpectedError(**kwds)

1302 return name if name or name is None else NN

1303

1304

1305def _name1__(kwds_name, **name__or_nameof):

1306 '''(INTERNAL) Resolve and set the C{B{name}=NN}.

1307 '''

1308 if kwds_name or name__or_nameof:

1309 n, kwds_name = _name2__(kwds_name, **name__or_nameof)

1310 kwds_name.update(name=n)

1311 return kwds_name

1312

1313

1314def _name2__(name=NN, name__=None, _or_nameof=None, **kwds):

1315 '''(INTERNAL) Get the C{B{name}=NN|None} and other C{kwds}.

1316 '''

1317 if name: # is given

1318 if isinstance(name, dict):

1319 kwds.update(name) # kwds = _xkwds(kwds, **name)?

1320 n, kwds = _name2__(**kwds)

1321 else:

1322 n = str(name)

1323 elif name__ is not None:

1324 n = typename(name__, NN)

1325 else:

1326 n = name if name is None else NN

1327 if _or_nameof is not None and not n:

1328 n = _xattr(_or_nameof, name=NN) # nameof

1329 return n, kwds # (str or None or {}), dict

1330

1331

1332def nameof(inst):

1333 '''Get the name of an instance.

1334

1335 @arg inst: The object (any C{type}).

1336

1337 @return: The instance' name (C{str}) or C{""}.

1338 '''

1339 n = _xattr(inst, name=NN)

1340 if not n: # and isinstance(inst, property):

1341 try:

1342 n = typename(inst.fget)

1343 except AttributeError:

1344 n = NN

1345 return n

1346

1347

1348def _notDecap(where):

1349 '''De-Capitalize C{where.__name__}.

1350 '''

1351 n = typename(where)

1352 c = n[3].lower() # len(_not_)

1353 return NN(n[:3], _SPACE_, c, n[4:])

1354

1355

1356def _notError(inst, name, args, kwds): # PYCHOK no cover

1357 '''(INTERNAL) Format an error message.

1358 '''

1359 n = _DOT_(classname(inst, prefixed=True), typename(name, name))

1360 m = _COMMASPACE_.join(modulename(c, prefixed=True) for c in type(inst).__mro__[1:-1])

1361 return _COMMASPACE_(unstr(n, *args, **kwds), Fmt.PAREN(_MRO_, m))

1362

1363

1364def _NotImplemented(inst, *other, **kwds):

1365 '''(INTERNAL) Raise a C{__special__} error or return C{NotImplemented},

1366 but only if env variable C{PYGEODESY_NOTIMPLEMENTED=std}.

1367 '''

1368 if _std_NotImplemented:

1369 return NotImplemented

1370 n, kwds = _callername2(other, **kwds) # source=True

1371 t = unstr(_DOT_(classname(inst), n), *other, **kwds)

1372 raise _NotImplementedError(t, txt=repr(inst))

1373

1374

1375def notImplemented(inst, *args, **kwds): # PYCHOK no cover

1376 '''Raise a C{NotImplementedError} for a missing instance method or

1377 property or for a missing caller feature.

1378

1379 @arg inst: Caller instance (C{any}) or C{None} for function.

1380 @arg args: Method or property positional arguments (any C{type}s).

1381 @arg kwds: Method or property keyword arguments (any C{type}s),

1382 except C{B{callername}=NN}, C{B{underOK}=False} and

1383 C{B{up}=2}.

1384 '''

1385 n, kwds = _callername2(args, **kwds)

1386 t = _notError(inst, n, args, kwds) if inst else unstr(n, *args, **kwds)

1387 raise _NotImplementedError(t, txt=_notDecap(notImplemented))

1388

1389

1390def notOverloaded(inst, *args, **kwds): # PYCHOK no cover

1391 '''Raise an C{AssertionError} for a method or property not overloaded.

1392

1393 @arg inst: Instance (C{any}).

1394 @arg args: Method or property positional arguments (any C{type}s).

1395 @arg kwds: Method or property keyword arguments (any C{type}s),

1396 except C{B{callername}=NN}, C{B{underOK}=False} and

1397 C{B{up}=2}.

1398 '''

1399 n, kwds = _callername2(args, **kwds)

1400 t = _notError(inst, n, args, kwds)

1401 raise _AssertionError(t, txt=_notDecap(notOverloaded))

1402

1403

1404def _Pass(arg, **unused): # PYCHOK no cover

1405 '''(INTERNAL) I{Pass-thru} class for C{_NamedTuple._Units_}.

1406 '''

1407 return arg

1408

1409

1410def _xjoined_(prefix, name=NN, enquote=True, **name__or_nameof):

1411 '''(INTERNAL) Join C{prefix} and non-empty C{name}.

1412 '''

1413 if name__or_nameof:

1414 name = _name__(name, **name__or_nameof)

1415 if name and prefix:

1416 if enquote:

1417 name = repr(name)

1418 t = _SPACE_(prefix, name)

1419 else:

1420 t = prefix or name

1421 return t

1422

1423

1424def _xnamed(inst, name=NN, force=False, **name__or_nameof):

1425 '''(INTERNAL) Set the instance' C{.name = B{name}}.

1426

1427 @arg inst: The instance (C{_Named}).

1428 @kwarg name: The name (C{str}).

1429 @kwarg force: If C{True}, force rename (C{bool}).

1430

1431 @return: The B{C{inst}}, renamed if B{C{force}}d

1432 or if not named before.

1433 '''

1434 if name__or_nameof:

1435 name = _name__(name, **name__or_nameof)

1436 if name and isinstance(inst, _Named):

1437 if not inst.name:

1438 inst.name = name

1439 elif force:

1440 inst.rename(name)

1441 return inst

1442

1443

1444def _xother3(inst, other, name=_other_, up=1, **name_other):

1445 '''(INTERNAL) Get C{name} and C{up} for a named C{other}.

1446 '''

1447 if name_other: # and other is None

1448 name, other = _xkwds_item2(name_other)

1449 elif other and len(other) == 1:

1450 name, other = _name__(name), other[0]

1451 else:

1452 raise _AssertionError(name, other, txt=classname(inst, prefixed=True))

1453 return other, name, up

1454

1455

1456def _xotherError(inst, other, name=_other_, up=1):

1457 '''(INTERNAL) Return a C{_TypeError} for an incompatible, named C{other}.

1458 '''

1459 n = _callname(name, classname(inst, prefixed=True), inst.name, up=up + 1)

1460 return _TypeError(name, other, txt=_incompatible(n))

1461

1462

1463def _xvalid(name, underOK=False):

1464 '''(INTERNAL) Check valid attribute name C{name}.

1465 '''

1466 return bool(name and isstr(name)

1467 and name != _name_

1468 and (underOK or not name.startswith(_UNDER_))

1469 and (not iskeyword(name))

1470 and isidentifier(name))

1471

1472

1473__all__ += _ALL_DOCS(_Named,

1474 _NamedBase, # _NamedDict,

1475 _NamedEnum, _NamedEnumItem,

1476 _NamedTuple)

1477

1478# **) MIT License

1479#

1481#

1482# Permission is hereby granted, free of charge, to any person obtaining a

1483# copy of this software and associated documentation files (the "Software"),

1484# to deal in the Software without restriction, including without limitation

1485# the rights to use, copy, modify, merge, publish, distribute, sublicense,

1486# and/or sell copies of the Software, and to permit persons to whom the

1487# Software is furnished to do so, subject to the following conditions:

1488#

1489# The above copyright notice and this permission notice shall be included

1490# in all copies or substantial portions of the Software.

1491#

1492# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

1493# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

1494# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL

1495# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR

1496# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,

1497# ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR

1498# OTHER DEALINGS IN THE SOFTWARE.