1

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

3

4 u'''Some, basic definitions, functions and dependencies.

5

6 Use env variable C{PYGEODESY_XPACKAGES} to avoid import of dependencies

7 C{geographiclib}, C{numpy} and/or C{scipy}. Set C{PYGEODESY_XPACKAGES}

8 to a comma-separated list of package names to be excluded from import.

9'''

10# make sure int/int division yields float quotient

11 from __future__ import division

12 division = 1 / 2 # .albers, .azimuthal, .constants, etc., .utily

13 if not division:

14 raise ImportError('%s 1/2 == %s' % ('division', division))

15 del division

16

17 from pygeodesy.errors import _AssertionError, _AttributeError, _ImportError, \

18 _TypeError, _TypesError, _ValueError, _xkwds_get

19 from pygeodesy.interns import MISSING, NN, _1_, _by_, _COMMA_, _DOT_, _ELLIPSIS4_, \

20 _enquote, _EQUAL_, _in_, _invalid_, _N_A_, _SPACE_, \

21 _UNDER_, _version_ # _utf_8_

22 from pygeodesy.lazily import _ALL_LAZY, _ALL_MODS as _MODS, _FOR_DOCS, \

23 _getenv, _sys, _sys_version_info2

24

25 from copy import copy as _copy, deepcopy as _deepcopy

26 from math import copysign as _copysign

27 import inspect as _inspect

28

29__all__ = _ALL_LAZY.basics

30__version__ = '23.09.28'

31

32_0_0 = 0.0 # in .constants

33_below_ = 'below'

34_cannot_ = 'cannot'

35_list_tuple_types = (list, tuple)

36_list_tuple_set_types = (list, tuple, set)

37_odd_ = 'odd'

38_required_ = 'required'

39_PYGEODESY_XPACKAGES_ = 'PYGEODESY_XPACKAGES'

40

41 try: # Luciano Ramalho, "Fluent Python", O'Reilly, 2016 p. 395, 2022 p. 577+

42 from numbers import Integral as _Ints, Real as _Scalars

43 except ImportError:

44 try:

45 _Ints = int, long # int objects (C{tuple})

46 except NameError: # Python 3+

47 _Ints = int, # int objects (C{tuple})

48 _Scalars = _Ints + (float,)

49

50 try:

51 try: # use C{from collections.abc import ...} in Python 3.9+

52 from collections.abc import Sequence as _Sequence # in .points

53 except ImportError: # no .abc in Python 3.8- and 2.7-

54 from collections import Sequence as _Sequence # in .points

55 if isinstance([], _Sequence) and isinstance((), _Sequence):

56 # and isinstance(range(1), _Sequence):

57 _Seqs = _Sequence

58 else:

59 raise ImportError # _AssertionError

60 except ImportError:

61 _Sequence = tuple # immutable for .points._Basequence

62 _Seqs = list, _Sequence # , range for function len2 below

63

64 try:

65 _Bytes = unicode, bytearray # PYCHOK expected

66 _Strs = basestring, str # XXX , bytes

67

68 def _pass(x): # == .utily._passarg

69 '''Pass thru, no-op'''

70 return x

71

72 str2ub = ub2str = _pass # avoids UnicodeDecodeError

73

74 def _Xstr(exc): # PYCHOK no cover

75 '''I{Invoke only with caught ImportError} B{C{exc}}.

76

77 C{... "cannot import name _distributor_init" ...}

78

79 only for C{numpy}, C{scipy} import errors occurring

80 on arm64 Apple Silicon running macOS' Python 2.7.16?

81 '''

82 t = str(exc)

83 if '_distributor_init' in t:

84 from sys import exc_info

85 from traceback import extract_tb

86 tb = exc_info()[2] # 3-tuple (type, value, traceback)

87 t4 = extract_tb(tb, 1)[0] # 4-tuple (file, line, name, 'import ...')

88 t = _SPACE_(_cannot_, t4[3] or _N_A_)

89 del tb, t4

90 return t

91

92 except NameError: # Python 3+

93 from pygeodesy.interns import _utf_8_

94

95 _Bytes = bytes, bytearray

96 _Strs = str, # tuple

97 _Xstr = str

98

99 def str2ub(sb):

100 '''Convert C{str} to C{unicode bytes}.

101 '''

102 if isinstance(sb, _Strs):

103 sb = sb.encode(_utf_8_)

104 return sb

105

106 def ub2str(ub):

107 '''Convert C{unicode bytes} to C{str}.

108 '''

109 if isinstance(ub, _Bytes):

110 ub = str(ub.decode(_utf_8_))

111 return ub

112

113

114 def clips(sb, limit=50, white=NN):

115 '''Clip a string to the given length limit.

116

117 @arg sb: String (C{str} or C{bytes}).

118 @kwarg limit: Length limit (C{int}).

119 @kwarg white: Optionally, replace all whitespace (C{str}).

120

121 @return: The clipped or unclipped B{C{sb}}.

122 '''

123 T = type(sb)

124 if len(sb) > limit > 8:

125 h = limit // 2

126 sb = T(_ELLIPSIS4_).join((sb[:h], sb[-h:]))

127 if white: # replace whitespace

128 sb = T(white).join(sb.split())

129 return sb

130

131

132 def copysign0(x, y):

133 '''Like C{math.copysign(x, y)} except C{zero}, I{unsigned}.

134

135 @return: C{math.copysign(B{x}, B{y})} if B{C{x}} else

136 C{type(B{x})(0)}.

137 '''

138 return _copysign(x, (y if y else 0)) if x else copytype(0, x)

139

140

141 def copytype(x, y):

142 '''Return the value of B{x} as C{type} of C{y}.

143

144 @return: C{type(B{y})(B{x})}.

145 '''

146 return type(y)(x if x else _0_0)

147

148

149 def halfs2(str2):

150 '''Split a string in 2 halfs.

151

152 @arg str2: String to split (C{str}).

153

154 @return: 2-Tuple C{(_1st, _2nd)} half (C{str}).

155

156 @raise ValueError: Zero or odd C{len(B{str2})}.

157 '''

158 h, r = divmod(len(str2), 2)

159 if r or not h:

160 raise _ValueError(str2=str2, txt=_odd_)

161 return str2[:h], str2[h:]

162

163

164 def int1s(x):

165 '''Count the number of 1-bits in an C{int}, I{unsigned}.

166

167 @note: C{int1s(-B{x}) == int1s(abs(B{x}))}.

168 '''

169 try:

170 return x.bit_count() # Python 3.10+

171 except AttributeError:

172 # bin(-x) = '-' + bin(abs(x))

173 return bin(x).count(_1_)

174

175

176 def isbool(obj):

177 '''Check whether an object is C{bool}ean.

178

179 @arg obj: The object (any C{type}).

180

181 @return: C{True} if B{C{obj}} is C{bool}ean,

182 C{False} otherwise.

183 '''

184 return isinstance(obj, bool) # and (obj is False

185# or obj is True)

186

187 if isbool(1) or isbool(0): # PYCHOK assert

188 raise _AssertionError(isbool=1)

189

190 if _FOR_DOCS: # XXX avoid epidoc Python 2.7 error

191

192 def isclass(obj):

193 '''Return C{True} if B{C{obj}} is a C{class} or C{type}.

194

195 @see: Python's C{inspect.isclass}.

196 '''

197 return _inspect.isclass(obj)

198 else:

199 isclass = _inspect.isclass

200

201

202 def iscomplex(obj):

203 '''Check whether an object is a C{complex} or complex C{str}.

204

205 @arg obj: The object (any C{type}).

206

207 @return: C{True} if B{C{obj}} is C{complex}, otherwise

208 C{False}.

209 '''

210 try: # hasattr('conjugate'), hasattr('real') and hasattr('imag')

211 return isinstance(obj, complex) or (isstr(obj)

212 and isinstance(complex(obj), complex)) # numbers.Complex?

213 except (TypeError, ValueError):

214 return False

215

216

217 def isfloat(obj):

218 '''Check whether an object is a C{float} or float C{str}.

219

220 @arg obj: The object (any C{type}).

221

222 @return: C{True} if B{C{obj}} is a C{float}, otherwise

223 C{False}.

224 '''

225 try:

226 return isinstance( obj, float) or (isstr(obj)

227 and isinstance(float(obj), float))

228 except (TypeError, ValueError):

229 return False

230

231

232 try:

233 isidentifier = str.isidentifier # Python 3, must be str

234 except AttributeError: # Python 2-

235

236 def isidentifier(obj):

237 '''Return C{True} if B{C{obj}} is a Python identifier.

238 '''

239 return bool(obj and isstr(obj)

240 and obj.replace(_UNDER_, NN).isalnum()

241 and not obj[:1].isdigit())

242

243

244 def isinstanceof(obj, *classes):

245 '''Check an instance of one or several C{classes}.

246

247 @arg obj: The instance (C{any}).

248 @arg classes: One or more classes (C{class}).

249

250 @return: C{True} if B{C{obj}} is in instance of

251 one of the B{C{classes}}.

252 '''

253 return isinstance(obj, classes)

254

255

256 def isint(obj, both=False):

257 '''Check for C{int} type or an integer C{float} value.

258

259 @arg obj: The object (any C{type}).

260 @kwarg both: If C{true}, check C{float} and L{Fsum}

261 type and value (C{bool}).

262

263 @return: C{True} if B{C{obj}} is C{int} or I{integer}

264 C{float} or L{Fsum}, C{False} otherwise.

265

266 @note: Both C{isint(True)} and C{isint(False)} return

267 C{False} (and no longer C{True}).

268 '''

269 if isinstance(obj, _Ints) and not isbool(obj):

270 return True

271 elif both: # and isinstance(obj, (float, Fsum))

272 try: # NOT , _Scalars) to include Fsum!

273 return obj.is_integer()

274 except AttributeError:

275 pass # XXX float(int(obj)) == obj?

276 return False

277

278

279 try:

280 from keyword import iskeyword # Python 2.7+

281 except ImportError:

282

283 def iskeyword(unused):

284 '''Not Implemented, C{False} always.

285 '''

286 return False

287

288

289 def islistuple(obj, minum=0):

290 '''Check for list or tuple C{type} with a minumal length.

291

292 @arg obj: The object (any C{type}).

293 @kwarg minum: Minimal C{len} required C({int}).

294

295 @return: C{True} if B{C{obj}} is C{list} or C{tuple} with

296 C{len} at least B{C{minum}}, C{False} otherwise.

297 '''

298 return type(obj) in _list_tuple_types and len(obj) >= (minum or 0)

299

300

301 def isodd(x):

302 '''Is B{C{x}} odd?

303

304 @arg x: Value (C{scalar}).

305

306 @return: C{True} if B{C{x}} is odd,

307 C{False} otherwise.

308 '''

309 return bool(int(x) & 1) # == bool(int(x) % 2)

310

311

312 def isscalar(obj):

313 '''Check for scalar types.

314

315 @arg obj: The object (any C{type}).

316

317 @return: C{True} if B{C{obj}} is C{scalar}, C{False} otherwise.

318 '''

319 return isinstance(obj, _Scalars) and not isbool(obj)

320

321

322 def issequence(obj, *excls):

323 '''Check for sequence types.

324

325 @arg obj: The object (any C{type}).

326 @arg excls: Classes to exclude (C{type}), all positional.

327

328 @note: Excluding C{tuple} implies excluding C{namedtuple}.

329

330 @return: C{True} if B{C{obj}} is a sequence, C{False} otherwise.

331 '''

332 return isinstance(obj, _Seqs) and not (excls and isinstance(obj, excls))

333

334

335 def isstr(obj):

336 '''Check for string types.

337

338 @arg obj: The object (any C{type}).

339

340 @return: C{True} if B{C{obj}} is C{str}, C{False} otherwise.

341 '''

342 return isinstance(obj, _Strs)

343

344

345 def issubclassof(Sub, *Supers):

346 '''Check whether a class is a sub-class of some other class(es).

347

348 @arg Sub: The sub-class (C{class}).

349 @arg Supers: One or more C(super) classes (C{class}).

350

351 @return: C{True} if B{C{Sub}} is a sub-class of any B{C{Supers}},

352 C{False} if not (C{bool}) or C{None} if B{C{Sub}} is not

353 a class or if no B{C{Supers}} are given or none of those

354 are a class.

355 '''

356 if isclass(Sub):

357 t = tuple(S for S in Supers if isclass(S))

358 if t:

359 return bool(issubclass(Sub, t))

360 return None

361

362

363 def len2(items):

364 '''Make built-in function L{len} work for generators, iterators,

365 etc. since those can only be started exactly once.

366

367 @arg items: Generator, iterator, list, range, tuple, etc.

368

369 @return: 2-Tuple C{(n, items)} of the number of items (C{int})

370 and the items (C{list} or C{tuple}).

371 '''

372 if not isinstance(items, _Seqs): # NOT hasattr(items, '__len__'):

373 items = list(items)

374 return len(items), items

375

376

377 def map1(fun1, *xs): # XXX map_

378 '''Apply each B{C{xs}} to a single-argument function and

379 return a C{tuple} of results.

380

381 @arg fun1: 1-Arg function to apply (C{callable}).

382 @arg xs: Arguments to apply (C{any positional}).

383

384 @return: Function results (C{tuple}).

385 '''

386 return tuple(map(fun1, xs))

387

388

389 def map2(func, *xs):

390 '''Apply arguments to a function and return a C{tuple} of results.

391

392 Unlike Python 2's built-in L{map}, Python 3+ L{map} returns a

393 L{map} object, an iterator-like object which generates the

394 results only once. Converting the L{map} object to a tuple

395 maintains the Python 2 behavior.

396

397 @arg func: Function to apply (C{callable}).

398 @arg xs: Arguments to apply (C{list, tuple, ...}).

399

400 @return: Function results (C{tuple}).

401 '''

402 return tuple(map(func, *xs))

403

404

405 def neg(x, neg0=None):

406 '''Negate C{x} and optionally, negate C{0.0} amd C{-0.0}.

407

408 @kwarg neg0: Defines the return value for zero C{B{x}}: if C{None}

409 return C{0.0}, if C{True} return C{NEG0 if B{x}=0.0}

410 and C{0.0 if B{x}=NEG0} or if C{False} return C{B{x}}

411 I{as-is} (C{bool} or C{None}).

412

413 @return: C{-B{x} if B{x} else 0.0, NEG0 or B{x}}.

414 '''

415 return (-x) if x else (_0_0 if neg0 is None else (x if not neg0 else

416 (_0_0 if signBit(x) else _MODS.constants.NEG0)))

417

418

419 def neg_(*xs):

420 '''Negate all C{xs} with L{neg}.

421

422 @return: A C{map(neg, B{xs})}.

423 '''

424 return map(neg, xs)

425

426

427 def _reverange(n, stop=-1, step=-1):

428 '''(INTERNAL) Reversed range yielding C{n-1, n-1-step, ..., stop+1}.

429 '''

430 return range(n - 1, stop, step)

431

432

433 def signBit(x):

434 '''Return C{signbit(B{x})}, like C++.

435

436 @return: C{True} if C{B{x} < 0} or C{NEG0} (C{bool}).

437 '''

438 return x < 0 or _MODS.constants.isneg0(x)

439

440

441 def _signOf(x, ref): # in .fsums

442 '''(INTERNAL) Return the sign of B{C{x}} versus B{C{ref}}.

443 '''

444 return +1 if x > ref else (-1 if x < ref else 0)

445

446

447 def signOf(x):

448 '''Return sign of C{x} as C{int}.

449

450 @return: -1, 0 or +1 (C{int}).

451 '''

452 try:

453 s = x.signOf() # Fsum instance?

454 except AttributeError:

455 s = _signOf(x, 0)

456 return s

457

458

459 def _sizeof(inst):

460 '''(INTERNAL) Recursively size an C{inst}ance.

461

462 @return: Instance' size in bytes (C{int}),

463 ignoring class attributes and

464 counting duplicates only once or

465 C{None}.

466

467 @note: With C{PyPy}, the size is always C{None}.

468 '''

469 try:

470 _zB = _sys.getsizeof

471 _zD = _zB(None) # get some default

472 except TypeError: # PyPy3.10

473 return None

474

475 def _zR(s, iterable):

476 z, _s = 0, s.add

477 for o in iterable:

478 i = id(o)

479 if i not in s:

480 _s(i)

481 z += _zB(o, _zD)

482 if isinstance(o, dict):

483 z += _zR(s, o.keys())

484 z += _zR(s, o.values())

485 elif isinstance(o, _list_tuple_set_types):

486 z += _zR(s, o)

487 else:

488 try: # size instance' attr values only

489 z += _zR(s, o.__dict__.values())

490 except AttributeError: # None, int, etc.

491 pass

492 return z

493

494 return _zR(set(), (inst,))

495

496

497 def splice(iterable, n=2, **fill):

498 '''Split an iterable into C{n} slices.

499

500 @arg iterable: Items to be spliced (C{list}, C{tuple}, ...).

501 @kwarg n: Number of slices to generate (C{int}).

502 @kwarg fill: Optional fill value for missing items.

503

504 @return: A generator for each of B{C{n}} slices,

505 M{iterable[i::n] for i=0..n}.

506

507 @raise TypeError: Invalid B{C{n}}.

508

509 @note: Each generated slice is a C{tuple} or a C{list},

510 the latter only if the B{C{iterable}} is a C{list}.

511

512 @example:

513

514 >>> from pygeodesy import splice

515

516 >>> a, b = splice(range(10))

517 >>> a, b

518 ((0, 2, 4, 6, 8), (1, 3, 5, 7, 9))

519

520 >>> a, b, c = splice(range(10), n=3)

521 >>> a, b, c

522 ((0, 3, 6, 9), (1, 4, 7), (2, 5, 8))

523

524 >>> a, b, c = splice(range(10), n=3, fill=-1)

525 >>> a, b, c

526 ((0, 3, 6, 9), (1, 4, 7, -1), (2, 5, 8, -1))

527

528 >>> tuple(splice(list(range(9)), n=5))

529 ([0, 5], [1, 6], [2, 7], [3, 8], [4])

530

531 >>> splice(range(9), n=1)

532 <generator object splice at 0x0...>

533 '''

534 if not isint(n):

535 raise _TypeError(n=n)

536

537 t = iterable

538 if not isinstance(t, _list_tuple_types):

539 t = tuple(t) # force tuple, also for PyPy3

540

541 if n > 1:

542 if fill:

543 fill = _xkwds_get(fill, fill=MISSING)

544 if fill is not MISSING:

545 m = len(t) % n

546 if m > 0: # same type fill

547 t += type(t)((fill,) * (n - m))

548 for i in range(n):

549 # XXX t[i::n] chokes PyChecker

550 yield t[slice(i, None, n)]

551 else:

552 yield t

553

554

555 def _splituple(strs, *sep_splits): # in .mgrs, .osgr, .webmercator

556 '''(INTERNAL) Split a C{comma}- or C{whitespace}-separated

557 string into a C{tuple} of stripped strings.

558 '''

559 t = (strs.split(*sep_splits) if sep_splits else

560 strs.replace(_COMMA_, _SPACE_).split()) if strs else ()

561 return tuple(s.strip() for s in t if s)

562

563

564_XPACKAGES = _splituple(_getenv(_PYGEODESY_XPACKAGES_, NN))

565

566

567 def unsigned0(x):

568 '''Unsign if C{0.0}.

569

570 @return: C{B{x}} if B{C{x}} else C{0.0}.

571 '''

572 return x if x else _0_0

573

574

575 def _xargs_names(callabl):

576 '''(INTERNAL) Get the C{callabl}'s args names.

577 '''

578 try:

579 args_kwds = _inspect.signature(callabl).parameters.keys()

580 except AttributeError: # .signature new Python 3+

581 args_kwds = _inspect.getargspec(callabl).args

582 return tuple(args_kwds)

583

584

585 def _xcopy(inst, deep=False):

586 '''(INTERNAL) Copy an object, shallow or deep.

587

588 @arg inst: The object to copy (any C{type}).

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

590 a shallow copy (C{bool}).

591

592 @return: The copy of B{C{inst}}.

593 '''

594 return _deepcopy(inst) if deep else _copy(inst)

595

596

597 def _xdup(inst, **items):

598 '''(INTERNAL) Duplicate an object, replacing some attributes.

599

600 @arg inst: The object to copy (any C{type}).

601 @kwarg items: Attributes to be changed (C{any}).

602

603 @return: Shallow duplicate of B{C{inst}} with modified

604 attributes, if any B{C{items}}.

605

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

607 '''

608 d = _xcopy(inst, deep=False)

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

610 if not hasattr(d, n):

611 t = _MODS.named.classname(inst)

612 t = _SPACE_(_DOT_(t, n), _invalid_)

613 raise _AttributeError(txt=t, this=inst, **items)

614 setattr(d, n, v)

615 return d

616

617

618 def _xgeographiclib(where, *required):

619 '''(INTERNAL) Import C{geographiclib} and check required version.

620 '''

621 try:

622 _xpackage(_xgeographiclib)

623 import geographiclib

624 except ImportError as x:

625 raise _xImportError(x, where)

626 return _xversion(geographiclib, where, *required)

627

628

629 def _xImportError(x, where, **name):

630 '''(INTERNAL) Embellish an C{ImportError}.

631 '''

632 t = _SPACE_(_required_, _by_, _xwhere(where, **name))

633 return _ImportError(_Xstr(x), txt=t, cause=x)

634

635

636 def _xinstanceof(*Types, **name_value_pairs):

637 '''(INTERNAL) Check C{Types} of all C{name=value} pairs.

638

639 @arg Types: One or more classes or types (C{class}),

640 all positional.

641 @kwarg name_value_pairs: One or more C{B{name}=value} pairs

642 with the C{value} to be checked.

643

644 @raise TypeError: One of the B{C{name_value_pairs}} is not

645 an instance of any of the B{C{Types}}.

646 '''

647 if Types and name_value_pairs:

648 for n, v in name_value_pairs.items():

649 if not isinstance(v, Types):

650 raise _TypesError(n, v, *Types)

651 else:

652 raise _AssertionError(Types=Types, name_value_pairs=name_value_pairs)

653

654

655 def _xnumpy(where, *required):

656 '''(INTERNAL) Import C{numpy} and check required version.

657 '''

658 try:

659 _xpackage(_xnumpy)

660 import numpy

661 except ImportError as x:

662 raise _xImportError(x, where)

663 return _xversion(numpy, where, *required)

664

665

666 def _xpackage(_xpkg):

667 '''(INTERNAL) Check dependency to be excluded.

668 '''

669 n = _xpkg.__name__[2:]

670 if n in _XPACKAGES:

671 x = _SPACE_(n, _in_, _PYGEODESY_XPACKAGES_)

672 e = _enquote(_getenv(_PYGEODESY_XPACKAGES_, NN))

673 raise ImportError(_EQUAL_(x, e))

674

675

676 def _xor(x, *xs):

677 '''(INTERNAL) Exclusive-or C{x} and C{xs}.

678 '''

679 for x_ in xs:

680 x ^= x_

681 return x

682

683

684 def _xscipy(where, *required):

685 '''(INTERNAL) Import C{scipy} and check required version.

686 '''

687 try:

688 _xpackage(_xscipy)

689 import scipy

690 except ImportError as x:

691 raise _xImportError(x, where)

692 return _xversion(scipy, where, *required)

693

694

695 def _xsubclassof(*Classes, **name_value_pairs):

696 '''(INTERNAL) Check (super) class of all C{name=value} pairs.

697

698 @arg Classes: One or more classes or types (C{class}),

699 all positional.

700 @kwarg name_value_pairs: One or more C{B{name}=value} pairs

701 with the C{value} to be checked.

702

703 @raise TypeError: One of the B{C{name_value_pairs}} is not

704 a (sub-)class of any of the B{C{Classes}}.

705 '''

706 for n, v in name_value_pairs.items():

707 if not issubclassof(v, *Classes):

708 raise _TypesError(n, v, *Classes)

709

710

711 def _xversion(package, where, *required, **name):

712 '''(INTERNAL) Check the C{package} version vs B{C{required}}.

713 '''

714 n = len(required)

715 if n:

716 t = _xversion_info(package)

717 if t[:n] < required:

718 t = _SPACE_(package.__name__, _version_, _DOT_(*t),

719 _below_, _DOT_(*required),

720 _required_, _by_, _xwhere(where, **name))

721 raise ImportError(t)

722 return package

723

724

725 def _xversion_info(package): # in .karney

726 '''(INTERNAL) Get the C{package.__version_info__} as a 2- or

727 3-tuple C{(major, minor, revision)} if C{int}s.

728 '''

729 try:

730 t = package.__version_info__

731 except AttributeError:

732 t = package.__version__.strip()

733 t = t.replace(_DOT_, _SPACE_).split()[:3]

734 return map2(int, t)

735

736

737 def _xwhere(where, **name):

738 '''(INTERNAL) Get the fully qualified name.

739 '''

740 m = _MODS.named.modulename(where, prefixed=True)

741 if name:

742 n = _xkwds_get(name, name=NN)

743 if n:

744 m = _DOT_(m, n)

745 return m

746

747

748 if _sys_version_info2 < (3, 10): # see .errors

749 _zip = zip # PYCHOK exported

750 else: # Python 3.10+

751

752 def _zip(*args):

753 return zip(*args, strict=True)

754

755# **) MIT License

756#

757# Copyright (C) 2016-2023 -- mrJean1 at Gmail -- All Rights Reserved.

758#

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

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

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

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

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

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

765#

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

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

768#

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

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

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

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

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

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

775# OTHER DEALINGS IN THE SOFTWARE.