1

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

3

4 u'''Floating point and other formatting utilities.

5'''

6

7 from pygeodesy.basics import _0_0, isint, islistuple, isscalar, isstr, _zip

8# from pygeodesy.constants import _0_0

9 from pygeodesy.errors import _AttributeError, _IsnotError, itemsorted, _or, \

10 _TypeError, _ValueError, _xkwds_get, _xkwds_pop

11 from pygeodesy.interns import NN, _0_, _0to9_, MISSING, _BAR_, _COMMASPACE_, \

12 _DOT_, _dunder_nameof, _E_, _ELLIPSIS_, _EQUAL_, \

13 _H_, _LR_PAIRS, _N_, _name_, _not_, _not_scalar_, \

14 _PERCENT_, _SPACE_, _STAR_, _UNDER_

15 from pygeodesy.interns import _convergence_, _distant_, _e_, _eps_, _exceeds_, \

16 _EQUALSPACED_, _f_, _F_, _g_, _limit_, _no_, \

17 _tolerance_ # PYCHOK used!

18 from pygeodesy.lazily import _ALL_LAZY, _ALL_MODS as _MODS, _getenv

19

20 from math import fabs, log10 as _log10

21

22__all__ = _ALL_LAZY.streprs

23__version__ = '23.06.27'

24

25_EN_PREC = 6 # max MGRS/OSGR precision, 1 micrometer

26_EN_WIDE = 5 # number of MGRS/OSGR units, log10(_100km)

27_OKd_ = '._-' # acceptable name characters

28_PAREN_g = '(%g)' # PYCHOK used!

29_threshold_ = 'threshold' # PYCHOK used!

30

31

32 class _Fmt(str): # in .streprs

33 '''(INTERNAL) Callable formatting.

34 '''

35 name = NN

36

37 def __call__(self, *name_value_, **name_value):

38 '''Format a C{name=value} pair or C{name, value} pair

39 or just a single C{value}.

40 '''

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

42 break

43 else:

44 if len(name_value_) > 1:

45 n, v = name_value_[:2]

46 elif name_value_:

47 n, v = NN, name_value_[0]

48 else:

49 n, v = NN, MISSING

50 t = str.__mod__(self, v)

51 return NN(n, t) if n else t

52

53# def __mod__(self, arg, **unused):

54# '''Regular C{%} operator.

55# '''

56# return str.__mod__(self, arg)

57

58

59 class Fstr(str):

60 '''(INTERNAL) C{float} format.

61 '''

62 name = NN

63

64 def __call__(self, flt, prec=None, ints=False):

65 '''Format the B{C{flt}} like function L{fstr}.

66 '''

67 # see also function C{fstr} if isscalar case below

68 t = str.__mod__(_pct(self), flt) if prec is None else next(

69 _streprs(prec, (flt,), self, ints, True, None))

70 return t

71

72 def __mod__(self, arg, **unused):

73 '''Regular C{%} operator.

74

75 @arg arg: A C{scalar} value to be formatted (either

76 the C{scalar}, or a 1-tuple C{(scalar,)},

77 or 2-tuple C{(prec, scalar)}.

78

79 @raise TypeError: Non-scalar B{C{arg}} value.

80

81 @raise ValueError: Invalid B{C{arg}}.

82 '''

83 def _error(arg):

84 n = _DOT_(Fstr.__name__, self.name or self)

85 return _SPACE_(n, _PERCENT_, repr(arg))

86

87 prec = 6 # default std %f and %F

88 if islistuple(arg):

89 n = len(arg)

90 if n == 1:

91 arg = arg[0]

92 elif n == 2:

93 prec, arg = arg

94 else:

95 raise _ValueError(_error(arg))

96

97 if not isscalar(arg):

98 raise _TypeError(_error(arg))

99 return self(arg, prec=prec)

100

101

102 class _Sub(str):

103 '''(INTERNAL) Class list formatter.

104 '''

105 # see .ellipsoidalNvector.LatLon.deltaTo

106 def __call__(self, *Classes):

107 t = _or(*(C.__name__ for C in Classes))

108 return str.__mod__(self, t or MISSING)

109

110

111 class Fmt(object):

112 '''Formatting options.

113 '''

114 ANGLE = _Fmt('<%s>')

115 COLON = _Fmt(':%s')

116# COLONSPACE = _Fmt(': %s') # == _COLONSPACE_(n, v)

117# COMMASPACE = _Fmt(', %s') # == _COMMASPACE_(n, v)

118 convergence = _Fmt(_convergence_(_PAREN_g))

119 CURLY = _Fmt('{%s}') # BRACES

120 distant = _Fmt(_distant_('(%.3g)'))

121 DOT = _Fmt('.%s') # == NN(_DOT_, n)

122 e = Fstr(_e_)

123 E = Fstr(_E_)

124 EQUAL = _Fmt(_EQUAL_(NN, '%s'))

125 EQUALg = _Fmt(_EQUAL_(NN, '%g'))

126 EQUALSPACED = _Fmt(_EQUALSPACED_(NN, '%s'))

127 exceeds_eps = _Fmt(_exceeds_(_eps_, _PAREN_g))

128 exceeds_limit = _Fmt(_exceeds_(_limit_, _PAREN_g))

129 f = Fstr(_f_)

130 form = _getenv('PYGEODESY_FMT_FORM', NN)

131 F = Fstr(_F_)

132 g = Fstr(_g_)

133 G = Fstr('G')

134 h = Fstr('%+.*f') # height, .streprs.hstr

135 limit = _Fmt(' %s limit') # .units

136 LOPEN = _Fmt('(%s]') # left-open range (L, R]

137 PAREN = _Fmt('(%s)')

138 PAREN_g = _Fmt(_PAREN_g)

139 PARENSPACED = _Fmt(' (%s)')

140 QUOTE2 = _Fmt('"%s"')

141 ROPEN = _Fmt('[%s)') # right-open range [L, R)

142# SPACE = _Fmt(' %s') # == _SPACE_(n, v)

143 SQUARE = _Fmt('[%s]') # BRACKETS

144 sub_class = _Sub('%s (sub-)class')

145 TAG = ANGLE

146 TAGEND = _Fmt('</%s>')

147 tolerance = _Fmt(_tolerance_(_PAREN_g))

148 zone = _Fmt('%02d') # .epsg, .mgrs, .utmupsBase

149

150 def __init__(self):

151 for n, a in self.__class__.__dict__.items():

152 if isinstance(a, (Fstr, _Fmt)):

153 setattr(a, _name_, n)

154

155 def __call__(self, obj, prec=9):

156 '''Return C{str(B{obj})} or C{repr(B{obj})}.

157 '''

158 return str(obj) if isint(obj) else next(

159 _streprs(prec, (obj,), Fmt.g, False, False, repr))

160

161 def no_convergence(self, _d, *tol, **thresh):

162 t = Fmt.convergence(fabs(_d))

163 if tol:

164 t = _COMMASPACE_(t, Fmt.tolerance(tol[0]))

165 if thresh and _xkwds_get(thresh, thresh=False):

166 t = t.replace(_tolerance_, _threshold_)

167 return _no_(t)

168

169 Fmt = Fmt() # PYCHOK singleton

170 Fmt.__name__ = Fmt.__class__.__name__

171

172_DOTSTAR_ = Fmt.DOT(_STAR_)

173# formats %G and %g drop all trailing zeros and the

174# decimal point, making the float appear as an int

175_Gg = (Fmt.G, Fmt.g)

176_FfEeGg = (Fmt.F, Fmt.f, Fmt.E, Fmt.e) + _Gg # float formats

177_Fspec_ = NN('[%[<flags>][<width>]', _DOTSTAR_, ']', _BAR_.join(_FfEeGg)) # in testStreprs

178

179

180 def anstr(name, OKd=_OKd_, sub=_UNDER_):

181 '''Make a valid name of alphanumeric and OKd characters.

182

183 @arg name: The original name (C{str}).

184 @kwarg OKd: Other acceptable characters (C{str}).

185 @kwarg sub: Substitute for invalid charactes (C{str}).

186

187 @return: The modified name (C{str}).

188

189 @note: Leading and trailing whitespace characters are removed,

190 intermediate whitespace characters are coalesced and

191 substituted.

192 '''

193 s = n = str(name).strip()

194 for c in n:

195 if not (c.isalnum() or c in OKd or c in sub):

196 s = s.replace(c, _SPACE_)

197 return sub.join(s.strip().split())

198

199

200 def attrs(inst, *names, **Nones_True__pairs_kwds): # prec=6, fmt=Fmt.F, ints=False, Nones=True, sep=_EQUAL_

201 '''Get instance attributes as I{name=value} strings, with C{float}s

202 formatted by function L{fstr}.

203

204 @arg inst: The instance (any C{type}).

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

206 @kwarg Nones_True__pairs_kwds: Keyword argument for function L{pairs}, except

207 C{B{Nones}=True} to in-/exclude missing or C{None}-valued attributes.

208

209 @return: A C{tuple(B{sep}.join(t) for t in zip(B{names}, reprs(values, ...)))}

210 of C{str}s.

211 '''

212 def _items(inst, names, Nones):

213 for n in names:

214 v = getattr(inst, n, None)

215 if Nones or v is not None:

216 yield n, v

217

218 def _Nones_kwds(Nones=True, **kwds):

219 return Nones, kwds

220

221 Nones, kwds = _Nones_kwds(**Nones_True__pairs_kwds)

222 return pairs(_items(inst, names, Nones), **kwds)

223

224

225 def enstr2(easting, northing, prec, *extras, **wide_dot):

226 '''Return an MGRS/OSGR easting, northing string representations.

227

228 @arg easting: Easting from false easting (C{meter}).

229 @arg northing: Northing from from false northing (C{meter}).

230 @arg prec: Precision, the number of I{decimal} digits (C{int}) or if

231 negative, the number of I{units to drop}, like MGRS U{PRECISION

232 <https://GeographicLib.SourceForge.io/C++/doc/GeoConvert.1.html#PRECISION>}.

233 @arg extras: Optional leading items (C{str}s).

234 @kwarg wide_dot: Optional keword argument C{B{wide}=%d} for the number of I{unit digits}

235 (C{int}) and C{B{dot}=False} (C{bool}) to insert a decimal point.

236

237 @return: B{C{extras}} + 2-tuple C{(str(B{easting}), str(B{northing}))} or

238 + 2-tuple C{("", "")} for C{B{prec} <= -B{wide}}.

239

240 @raise ValueError: Invalid B{C{easting}}, B{C{northing}} or B{C{prec}}.

241

242 @note: The B{C{easting}} and B{C{northing}} values are I{truncated, not rounded}.

243 '''

244 t = extras

245 try: # like .dms.compassPoint

246 p = min(int(prec), _EN_PREC)

247 w = p + _xkwds_get(wide_dot, wide=_EN_WIDE)

248 if w > 0:

249 f = 10**p # truncate

250 d = (-p) if p > 0 and _xkwds_get(wide_dot, dot=False) else 0

251 t += (_0wdot(w, int(easting * f), d),

252 _0wdot(w, int(northing * f), d))

253 else: # prec <= -_EN_WIDE

254 t += (NN, NN)

255 except (TypeError, ValueError) as x:

256 raise _ValueError(easting=easting, northing=northing, prec=prec, cause=x)

257 return t

258

259 if enstr2.__doc__: # PYCHOK expected

260 enstr2.__doc__ %= (_EN_WIDE,)

261

262

263 def _enstr2m3(estr, nstr, wide=_EN_WIDE): # in .mgrs, .osgr

264 '''(INTERNAL) Convert east- and northing C{str}s to meter and resolution.

265 '''

266 def _s2m2(s, m): # e or n str to float meter

267 if _DOT_ in s:

268 m = 1 # meter

269 else:

270 s += _0_ * wide

271 s = _DOT_(s[:wide], s[wide:wide+_EN_PREC])

272 return float(s), m

273

274 e, m = _s2m2(estr, 0)

275 n, m = _s2m2(nstr, m)

276 if not m:

277 p = max(len(estr), len(nstr)) # 2 = Km, 5 = m, 7 = cm

278 m = 10**max(-_EN_PREC, wide - p) # resolution, meter

279 return e, n, m

280

281

282 def fstr(floats, prec=6, fmt=Fmt.F, ints=False, sep=_COMMASPACE_, strepr=None):

283 '''Convert one or more floats to string, optionally stripped of trailing zero decimals.

284

285 @arg floats: Single or a list, sequence, tuple, etc. (C{scalar}s).

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

287 Trailing zero decimals are stripped if B{C{prec}} is

288 positive, but kept for negative B{C{prec}} values. In

289 addition, trailing decimal zeros are stripped for U{alternate,

290 form '#'<https://docs.Python.org/3/library/stdtypes.html

291 #printf-style-string-formatting>}.

292 @kwarg fmt: Optional, C{float} format (C{str}).

293 @kwarg ints: Optionally, remove the decimal dot for C{int} values (C{bool}).

294 @kwarg sep: Separator joining the B{C{floats}} (C{str}).

295 @kwarg strepr: Optional callable to format non-C{floats} (typically

296 C{repr}, C{str}) or C{None} to raise a TypeError.

297

298 @return: The C{sep.join(strs(floats, ...)} joined (C{str}) or single

299 C{strs((floats,), ...)} (C{str}) if B{C{floats}} is C{scalar}.

300 '''

301 if isscalar(floats): # see Fstr.__call__ above

302 return next(_streprs(prec, (floats,), fmt, ints, True, strepr))

303 else:

304 return sep.join(_streprs(prec, floats, fmt, ints, True, strepr))

305

306

307 def _fstrENH2(inst, prec, m): # in .css, .lcc, .utmupsBase

308 # (INTERNAL) For C{Css.} and C{Lcc.} C{toRepr} and C{toStr} and C{UtmUpsBase._toStr}.

309 t = inst.easting, inst.northing

310 t = tuple(_streprs(prec, t, Fmt.F, False, True, None))

311 T = _E_, _N_

312 if m is not None and fabs(inst.height): # fabs(self.height) > EPS

313 t += hstr(inst.height, prec=-2, m=m),

314 T += _H_,

315 return t, T

316

317

318 def _fstrLL0(inst, prec, toRepr): # in .azimuthal, .css

319 # (INTERNAL) For C{_AlbersBase.}, C{_AzimuthalBase.} and C{CassiniSoldner.}

320 t = tuple(_streprs(prec, inst.latlon0, Fmt.F, False, True, None))

321 if toRepr:

322 n = inst.name

323 if n:

324 t += Fmt.EQUAL(_name_, repr(n)),

325 t = Fmt.PAREN(inst.classname, _COMMASPACE_.join(t))

326 return t

327

328

329 def fstrzs(efstr, ap1z=False):

330 '''Strip trailing zero decimals from a C{float} string.

331

332 @arg efstr: Float with or without exponent (C{str}).

333 @kwarg ap1z: Append the decimal point and one zero decimal

334 if the B{C{efstr}} is all digits (C{bool}).

335

336 @return: Float (C{str}).

337 '''

338 s = efstr.find(_DOT_)

339 if s >= 0:

340 e = efstr.rfind(Fmt.e)

341 if e < 0:

342 e = efstr.rfind(Fmt.E)

343 if e < 0:

344 e = len(efstr)

345 s += 2 # keep 1st _DOT_ + _0_

346 if s < e and efstr[e-1] == _0_:

347 efstr = NN(efstr[:s], efstr[s:e].rstrip(_0_), efstr[e:])

348

349 elif ap1z:

350 # %.G and %.g formats may drop the decimal

351 # point and all trailing zeros, ...

352 if efstr.isdigit():

353 efstr += _DOT_ + _0_ # ... append or ...

354 else: # ... insert one dot and zero

355 e = efstr.rfind(Fmt.e)

356 if e < 0:

357 e = efstr.rfind(Fmt.E)

358 if e > 0:

359 efstr = NN(efstr[:e], _DOT_, _0_, efstr[e:])

360

361 return efstr

362

363

364 def hstr(height, prec=2, fmt=Fmt.h, ints=False, m=NN):

365 '''Return a string for the height value.

366

367 @arg height: Height value (C{float}).

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

369 Trailing zero decimals are stripped if B{C{prec}} is

370 positive, but kept for negative B{C{prec}} values.

371 @kwarg fmt: Optional, C{float} format (C{str}).

372 @kwarg ints: Optionally, remove the decimal dot for C{int} values (C{bool}).

373 @kwarg m: Optional unit of the height (C{str}).

374 '''

375 h = next(_streprs(prec, (height,), fmt, ints, True, None))

376 return NN(h, str(m)) if m else h

377

378

379 def instr(inst, *args, **kwds):

380 '''Return the string representation of an instantiation.

381

382 @arg inst: The instance (any C{type}).

383 @arg args: Optional positional arguments.

384 @kwarg kwds: Optional keyword arguments.

385

386 @return: Representation (C{str}).

387 '''

388 return unstr(_MODS.named.classname(inst), *args, **kwds)

389

390

391 def lrstrip(txt, lrpairs=_LR_PAIRS):

392 '''Left- I{and} right-strip parentheses, brackets, etc. from a string.

393

394 @arg txt: String to be stripped (C{str}).

395 @kwarg lrpairs: Parentheses, etc. to remove (C{dict} of one or several

396 C{(Left, Right)} pairs).

397

398 @return: Stripped B{C{txt}} (C{str}).

399 '''

400 _e, _s, _n = str.endswith, str.startswith, len

401 while _n(txt) > 2:

402 for L, R in lrpairs.items():

403 if _e(txt, R) and _s(txt, L):

404 txt = txt[_n(L):-_n(R)]

405 break # restart

406 else:

407 return txt

408

409

410 def pairs(items, prec=6, fmt=Fmt.F, ints=False, sep=_EQUAL_):

411 '''Convert items to I{name=value} strings, with C{float}s handled like L{fstr}.

412

413 @arg items: Name-value pairs (C{dict} or 2-{tuple}s of any C{type}s).

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

415 Trailing zero decimals are stripped if B{C{prec}} is

416 positive, but kept for negative B{C{prec}} values.

417 @kwarg fmt: Optional, C{float} format (C{str}).

418 @kwarg ints: Optionally, remove the decimal dot for C{int} values (C{bool}).

419 @kwarg sep: Separator joining I{names} and I{values} (C{str}).

420

421 @return: A C{tuple(B{sep}.join(t) for t in B{items}))} of C{str}s.

422 '''

423 try:

424 if isinstance(items, dict):

425 items = itemsorted(items)

426 elif not islistuple(items):

427 items = tuple(items)

428 # can't unzip empty items tuple, list, etc.

429 n, v = _zip(*items) if items else ((), ()) # strict=True

430 except (TypeError, ValueError):

431 raise _IsnotError(dict.__name__, '2-tuples', items=items)

432 v = _streprs(prec, v, fmt, ints, False, repr)

433 return tuple(sep.join(t) for t in _zip(map(str, n), v)) # strict=True

434

435

436 def _pct(fmt):

437 '''(INTERNAL) Prefix C{%} if needed.

438 '''

439 return fmt if _PERCENT_ in fmt else NN(_PERCENT_, fmt)

440

441

442 def reprs(objs, prec=6, fmt=Fmt.F, ints=False):

443 '''Convert objects to C{repr} strings, with C{float}s handled like L{fstr}.

444

445 @arg objs: List, sequence, tuple, etc. (any C{type}s).

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

447 Trailing zero decimals are stripped if B{C{prec}} is

448 positive, but kept for negative B{C{prec}} values.

449 @kwarg fmt: Optional, C{float} format (C{str}).

450 @kwarg ints: Optionally, remove the decimal dot for C{int} values (C{bool}).

451

452 @return: A C{tuple(map(fstr|repr, objs))} of C{str}s.

453 '''

454 return tuple(_streprs(prec, objs, fmt, ints, False, repr)) if objs else ()

455

456

457 def _resolution10(resolution, Error=ValueError): # in .mgrs, .osgr

458 '''(INTERNAL) Validate C{resolution} in C{meter}.

459 '''

460 try:

461 r = int(_log10(resolution))

462 if _EN_WIDE < r or r < -_EN_PREC:

463 raise ValueError

464 except (ValueError, TypeError):

465 raise Error(resolution=resolution)

466 return _MODS.units.Meter(resolution=10**r)

467

468

469 def _streprs(prec, objs, fmt, ints, force, strepr):

470 '''(INTERNAL) Helper for C{fstr}, C{pairs}, C{reprs} and C{strs}

471 '''

472 # <https://docs.Python.org/3/library/stdtypes.html#printf-style-string-formatting>

473 if fmt in _FfEeGg:

474 fGg = fmt in _Gg

475 fmt = NN(_PERCENT_, _DOT_, abs(prec), fmt)

476

477 elif fmt.startswith(_PERCENT_):

478 fGg = False

479 try: # to make sure fmt is valid

480 f = fmt.replace(_DOTSTAR_, Fmt.DOT(abs(prec)))

481 _ = f % (_0_0,)

482 except (TypeError, ValueError):

483 raise _ValueError(fmt=fmt, txt=_not_(repr(_DOTSTAR_)))

484 fmt = f

485

486 else:

487 raise _ValueError(fmt=fmt, txt=_not_(repr(_Fspec_)))

488

489 for i, o in enumerate(objs):

490 if force or isinstance(o, float):

491 t = fmt % (float(o),)

492 if ints and t.rstrip(_0to9_ if isint(o, both=True) else

493 _0_).endswith(_DOT_):

494 t = t.split(_DOT_)[0]

495 elif prec > 1:

496 t = fstrzs(t, ap1z=fGg)

497 elif strepr:

498 t = strepr(o)

499 else:

500 t = Fmt.PARENSPACED(Fmt.SQUARE(objs=i), o)

501 raise TypeError(_SPACE_(t, _not_scalar_))

502 yield t

503

504

505 def strs(objs, prec=6, fmt=Fmt.F, ints=False):

506 '''Convert objects to C{str} strings, with C{float}s handled like L{fstr}.

507

508 @arg objs: List, sequence, tuple, etc. (any C{type}s).

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

510 Trailing zero decimals are stripped if B{C{prec}} is

511 positive, but kept for negative B{C{prec}} values.

512 @kwarg fmt: Optional, C{float} format (C{str}).

513 @kwarg ints: Optionally, remove the decimal dot for C{int} values (C{bool}).

514

515 @return: A C{tuple(map(fstr|str, objs))} of C{str}s.

516 '''

517 return tuple(_streprs(prec, objs, fmt, ints, False, str)) if objs else ()

518

519

520 def unstr(where, *args, **kwds):

521 '''Return the string representation of an invokation.

522

523 @arg where: Class, function, method (C{type}) or name (C{str}).

524 @arg args: Optional positional arguments.

525 @kwarg kwds: Optional keyword arguments, except

526 C{B{_ELLIPSIS}=False}.

527

528 @return: Representation (C{str}).

529 '''

530 t = reprs(args, fmt=Fmt.g) if args else ()

531 if kwds and _xkwds_pop(kwds, _ELLIPSIS=False):

532 t += _ELLIPSIS_,

533 if kwds:

534 t += pairs(itemsorted(kwds), fmt=Fmt.g)

535 n = where if isstr(where) else _dunder_nameof(where)

536 return Fmt.PAREN(n, _COMMASPACE_.join(t))

537

538

539 def _0wd(*w_i): # in .osgr, .wgrs

540 '''(INTERNAL) Int formatter'.

541 '''

542 return '%0*d' % w_i

543

544

545 def _0wdot(w, f, dot=0):

546 '''(INTERNAL) Int and Float formatter'.

547 '''

548 s = _0wd(w, int(f))

549 if dot:

550 s = _DOT_(s[:dot], s[dot:])

551 return s

552

553

554 def _0wpF(*w_p_f): # in .dms, .osgr

555 '''(INTERNAL) Float deg, min, sec formatter'.

556 '''

557 return '%0*.*f' % w_p_f # XXX was F

558

559

560 def _xattrs(insto, other, *attrs): # see .errors._xattr

561 '''(INTERNAL) Copy attribute values from B{C{other}} to B{C{insto}}.

562

563 @arg insto: Object to copy attribute values to (any C{type}).

564 @arg other: Object to copy attribute values from (any C{type}).

565 @arg attrs: One or more attribute names (C{str}s).

566

567 @return: Object B{C{insto}}, updated.

568

569 @raise AttributeError: An B{C{attrs}} doesn't exist

570 or is not settable.

571 '''

572 def _getattr(o, a):

573 if hasattr(o, a):

574 return getattr(o, a)

575 try:

576 n = o._DOT_(a)

577 except AttributeError:

578 n = Fmt.DOT(a)

579 raise _AttributeError(o, name=n)

580

581 for a in attrs:

582 s = _getattr(other, a)

583 g = _getattr(insto, a)

584 if (g is None and s is not None) or g != s:

585 setattr(insto, a, s) # not settable?

586 return insto

587

588

589 def _xzipairs(names, values, sep=_COMMASPACE_, fmt=NN, pair_fmt=Fmt.COLON):

590 '''(INTERNAL) Zip C{names} and C{values} into a C{str}, joined and bracketed.

591 '''

592 try:

593 t = sep.join(pair_fmt(*t) for t in _zip(names, values)) # strict=True

594 except Exception as x:

595 raise _ValueError(names=names, values=values, cause=x)

596 return (fmt % (t,)) if fmt else t

597

598# **) MIT License

599#

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

601#

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

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

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

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

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

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

608#

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

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

611#

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

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

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

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

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

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

618# OTHER DEALINGS IN THE SOFTWARE.